ESP-AT

https://docs.espressif.com/projects/esp-at/en/latest/esp32
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ESP-AT is an official AT command framework by Espressif Systems for ESP32, ESP32-C series, and...
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### Example: Initialize, Create, and Start Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Full sequence to initialize the server, create services, and start them.

```text
AT+BLEINIT=2   // Role: server
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
```

--------------------------------

### Interactive Installation Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_clone_project_and_compile_it.html

Example of the interactive prompts encountered during the initial installation process.

```text
$ ./build.py install
Ready to install ESP-IDF prerequisites..

... (more lines of install ESP-IDF prerequisites)

Ready to install ESP-AT prerequisites..

... (more lines of install ESP-IDF prerequisites)

Platform name:
1. PLATFORM_ESP32
...
choose(range[1,7]):1

Module name:
1. WROOM-32 (Firmware description: ...)
...
choose(range[1,7]):1

Enable silence mode to remove some logs and reduce the firmware size?
0. No
1. Yes
choose(range[0,1]):1
Platform name:ESP32 Module name:WROOM-32 Silence:1
Cloning into 'esp-idf'...

... (more lines of clone esp-idf)

Ready to set up ESP-IDF tools..

... (more lines of set up ESP-IDF tools)

All done! You can now run:

./build.py build
```

--------------------------------

### Basic AT Command Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Initial setup commands for Wi-Fi mode and connection.

```text
AT+CWMODE=1
AT+CWJAP="ssid","password"
```

--------------------------------

### Example: Configure TCP/SSL Server Timeout

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Example sequence to enable multiple connections, start a server, and set the timeout.

```text
AT+CIPMUX=1
AT+CIPSERVER=1,1001
AT+CIPSTO=10
```

--------------------------------

### Example: Set Header and Download Resource

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/HTTP_AT_Commands.html

Demonstrates setting a Range header and performing an HTTP GET request.

```AT Command
// Set the request header
AT+HTTPCHEAD=18

// After receiving the ">" symbol, enter the Range request header below to download only the first 256 bytes of the resource
Range: bytes=0-255

// Download HTTP resource
AT+HTTPCGET="https://docs.espressif.com/projects/esp-at/en/latest/esp32/index.html"
```

--------------------------------

### AT+BLEGATTSIND Usage Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence for initializing a server, starting advertising, and sending an indication.

```text
AT+BLEINIT=2      // Role: server
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEADVSTART    // Start advertising. After the client is connected, it must be configured to receive indications.
AT+BLEGATTSCHAR?  // Query the characteristics which the client can receive indications.
// For example, to indicate 4 bytes of data using the 7th characteristic in the 3rd service, use the following command:
AT+BLEGATTSIND=0,3,7,4
// After the symbol ">" shows, input 4 bytes of data, such as "1234". Then the data will be transmitted automatically.
```

--------------------------------

### Start and Disable mDNS Service Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Examples for starting an mDNS service with specific parameters and disabling the function.

```text
// Start an mDNS service. Set the hostname to "espressif", service type to "_iot", and port to 8080.
AT+MDNS=1,"espressif","_iot",8080

// Disable mDNS function
AT+MDNS=0
```

--------------------------------

### Example: Update Connection Parameters

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

A complete example showing initialization, connection, and parameter update.

```text
AT+BLEINIT=1   // Role: client
AT+BLECONN=0,"24:0a:c4:09:34:23"
AT+BLECONNPARAM=0,12,14,1,500
```

--------------------------------

### Configure ESP32 Device Parameters

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/Web_server_AT_Examples.html

Initial setup commands to clear previous settings, set the Wi-Fi mode, configure the SoftAP, enable multiple connections, and start the web server.

```text
AT+RESTORE
```

```text
AT+CWMODE=3
```

```text
AT+CWSAP="pos_softap","espressif",11,3,3
```

```text
AT+CIPMUX=1
```

```text
AT+WEBSERVER=1,80,40
```

--------------------------------

### AT+FSMOUNT Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/FS_AT_Commands.html

Examples for manually mounting and unmounting the filesystem.

```text
// unmount the filesystem manually
AT+FSMOUNT=0

// mount the filesystem manually
AT+FSMOUNT=1
```

--------------------------------

### AT+CIPSTART Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Various examples demonstrating TCP and TCPv6 connection establishment with different parameters.

```text
AT+CIPSTART="TCP","iot.espressif.cn",8000
AT+CIPSTART="TCP","192.168.101.110",1000
AT+CIPSTART="TCP","192.168.101.110",1000,60
AT+CIPSTART="TCP","192.168.101.110",1000,,"192.168.101.100"

// Connect to GitHub's TCP server with a 5-second timeout
AT+CIPSTART="TCP","www.github.com",80,,,5000

AT+CIPSTART="TCPv6","test-ipv6.com",80
AT+CIPSTART="TCPv6","fe80::860d:8eff:fe9d:cd90",1000,,"fe80::411c:1fdb:22a6:4d24"

// esp-at has obtained an IPv6 global address by AT+CWJAP before
AT+CIPSTART="TCPv6","2404:6800:4005:80b::2004",80,,"240e:3a1:2070:11c0:32ae:a4ff:fe80:65ac"
```

--------------------------------

### Create and Start Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/bluetooth_le_at_examples.html

Configure and start GATT services on the server.

```AT Command
AT+BLEGATTSSRVCRE
```

```AT Command
OK
```

```AT Command
AT+BLEGATTSSRVSTART
```

```AT Command
OK
```

--------------------------------

### ESP32 Startup Log Output

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Get_Started/Downloading_guide.html

Example of the expected bootloader and firmware initialization log output when the device starts correctly.

```text
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:5884
ho 0 tail 12 room 4
load:0x40078000,len:15844
load:0x40080400,len:3560
entry 0x40080604
I (29) boot: ESP-IDF v5.0-541-g885e501d99-dirty 2nd stage bootloader
I (29) boot: compile time 08:40:13
I (29) boot: chip revision: v1.0
I (34) boot.esp32: SPI Speed      : 40MHz
I (38) boot.esp32: SPI Mode       : DIO
I (43) boot.esp32: SPI Flash Size : 4MB
I (47) boot: Enabling RNG early entropy source...
I (53) boot: Partition Table:
I (56) boot: ## Label            Usage          Type ST Offset   Length
I (64) boot:  0 phy_init         RF data          01 01 0000f000 00001000
I (71) boot:  1 otadata          OTA data         01 00 00010000 00002000
I (78) boot:  2 nvs              WiFi data        01 02 00012000 0000e000
I (86) boot:  3 at_customize     unknown          40 00 00020000 000e0000
I (93) boot:  4 ota_0            OTA app          00 10 00100000 00180000
I (101) boot:  5 ota_1            OTA app          00 11 00280000 00180000
I (108) boot: End of partition table
I (113) esp_image: segment 0: paddr=00100020 vaddr=3f400020 size=1a854h (108628) map
I (161) esp_image: segment 1: paddr=0011a87c vaddr=3ff80063 size=00008h (     8) load
I (161) esp_image: segment 2: paddr=0011a88c vaddr=3ffbdb60 size=04d5ch ( 19804) load
I (174) esp_image: segment 3: paddr=0011f5f0 vaddr=40080000 size=00a28h (  2600) load
I (176) esp_image: segment 4: paddr=00120020 vaddr=400d0020 size=11f5c0h (1177024) map
I (609) esp_image: segment 5: paddr=0023f5e8 vaddr=40080a28 size=1e948h (125256) load
I (660) esp_image: segment 6: paddr=0025df38 vaddr=400c0000 size=00064h (   100) load
I (676) boot: Loaded app from partition at offset 0x100000
I (676) boot: Disabling RNG early entropy source...
no external 32k oscillator, disable it now.
at param mode: 1
AT cmd port:uart1 tx:17 rx:16 cts:15 rts:14 baudrate:115200
module_name: WROOM-32
max tx power=78, ret=0
2.5.0

```

--------------------------------

### System Prompt Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples of setting the system prompt state for different behaviors.

```text
// print no prompt info when quitting passthrough mode
// print detailed connection prompt info
// print no prompt info when the connection status is changed
AT+SYSMSG=2
```

```text
// In the transparent transmission mode, a prompt message will be printed when the Wi-Fi, socket, Bluetooth LE or Bluetooth status changes
AT+SYSMSG=4
```

--------------------------------

### Hostname Configuration Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Example sequence to set the station mode and configure the hostname.

```text
AT+CWMODE=3
AT+CWHOSTNAME="my_test"
```

--------------------------------

### HTTP Client Request Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/HTTP_AT_Commands.html

Examples of HEAD, GET, and POST requests using the AT+HTTPCLIENT command.

```text
// HEAD Request
AT+HTTPCLIENT=1,0,"http://httpbin.org/get","httpbin.org","/get",1

// GET Request
AT+HTTPCLIENT=2,0,"http://httpbin.org/get","httpbin.org","/get",1

// POST Request
AT+HTTPCLIENT=3,0,"http://httpbin.org/post","httpbin.org","/post",1,"field1=value1&field2=value2"
```

--------------------------------

### SSL Connection Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Various examples of using AT+CIPSTART to connect to SSL servers, including IPv6 and timeout configurations.

```text
AT+CIPSTART="SSL","iot.espressif.cn",8443
AT+CIPSTART="SSL","192.168.101.110",1000,,"192.168.101.100"

// Connect to Microsoft Bing's SSL server with a 5-second timeout
AT+CIPSTART="SSL","www.bing.com",443,,,5000

// esp-at has obtained an IPv6 global address by AT+CWJAP before
AT+CIPSTART="SSLv6","240e:3a1:2070:11c0:6972:6f96:9147:d66d",1000,,"240e:3a1:2070:11c0:55ce:4e19:9649:b75"
```

--------------------------------

### Classic Bluetooth SPP Initialization Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BT_AT_Commands.html

Examples for initializing the SPP profile as master or slave.

```text
AT+BTSPPINIT=1    // master
AT+BTSPPINIT=2    // slave
```

--------------------------------

### AT+WEBSERVER Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Web_server_AT_Commands.html

Examples showing how to enable the web server with specific port and timeout settings, and how to disable it.

```text
// Enable the Web server with port 80, and the timeout for the every connection is 50 seconds
AT+WEBSERVER=1,80,50

// Disable the Web server
AT+WEBSERVER=0
```

--------------------------------

### DHCP Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Examples demonstrating how to enable or disable DHCP for Station and SoftAP modes.

```text
// Enable Station DHCP. If the last DHCP mode is 2, the current DHCP mode will be 3.
AT+CWDHCP=1,1

// Disable SoftAP DHCP. If the last DHCP mode is 3, the current DHCP mode will be 1.
AT+CWDHCP=0,2
```

--------------------------------

### Install Project Environment

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_clone_project_and_compile_it.html

Run the installation script to set up Python packages, ESP-IDF, and required compiler tools.

```bash
./build.py install
```

```bash
python build.py install
```

--------------------------------

### SNTP Time Query Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Examples demonstrating how to configure SNTP and query the time.

```text
AT+CWMODE=1
AT+CWJAP="1234567890","1234567890"
AT+CIPSNTPCFG=1,8,"cn.ntp.org.cn","ntp.sjtu.edu.cn"
AT+CIPSNTPTIME?
+CIPSNTPTIME:Tue Oct 19 17:47:56 2021
OK

or

AT+CWMODE=1
AT+CWJAP="1234567890","1234567890"
AT+CIPSNTPCFG=1,530
AT+CIPSNTPTIME?
+CIPSNTPTIME:Tue Oct 19 15:17:56 2021
OK
```

--------------------------------

### DNS Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Examples demonstrating how to enable automatic DNS, set manual IPv4 addresses, and set manual IPv6 addresses.

```text
AT+CIPDNS=0
AT+CIPDNS=1,"208.67.222.222","114.114.114.114","8.8.8.8"

// first DNS Server based on IPv6: China Future Internet Engineering Center
// second DNS Server based on IPv6: google-public-dns-a.google.com
// third DNS Server based on IPv6: main DNS Server based on IPv6 in JiangSu Province, China
AT+CIPDNS=1,"240c::6666","2001:4860:4860::8888","240e:5a::6666"
```

--------------------------------

### Example: Query BLE GATTS Characteristics

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Sequence to initialize the server, create and start a service, then query characteristics.

```text
AT+BLEINIT=2   // Role: server
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEGATTSCHAR?
```

--------------------------------

### BLE Notification Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

A sequence of commands to initialize a server, start advertising, and send a notification to a connected client.

```text
AT+BLEINIT=2      // Role: server.
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEADVSTART    // Start advertising. After the client is connected, it must be configured to receive notifications.
AT+BLEGATTSCHAR?  // Query the characteristics which the client will be notified of.
// For example, to notify of 4-byte data using the 6th characteristic in the 3rd service, use the following command:
AT+BLEGATTSNTFY=0,3,6,4
// After the symbol ">" shows, enter the 4-byte data, such as "1234". Then the data will be transmitted automatically.
```

--------------------------------

### AT+MQTTPUB Usage Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/MQTT_AT_Commands.html

Example sequence for configuring, connecting, and publishing a JSON string via MQTT.

```text
AT+CWMODE=1
AT+CWJAP="ssid","password"
AT+MQTTUSERCFG=0,1,"ESP32","espressif","1234567890",0,0,""
AT+MQTTCONN=0,"192.168.10.234",1883,0
AT+MQTTPUB=0,"topic","\"{\"timestamp\":\"20201121085253\"}\"",0,0  // When sending this command, please pay attention to whether special characters need to be escaped.
```

--------------------------------

### DHCP Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Examples for enabling custom DHCP ranges and reverting to default settings.

```text
AT+CWDHCPS=1,3,"192.168.4.10","192.168.4.15"

AT+CWDHCPS=0 // Disable the settings and use the default IPv4 address range.
```

--------------------------------

### MCU Wake-up Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/user_at_commands.html

Examples showing how to enable and disable the MCU wake-up configuration.

```text
// Enable wake-up MCU configuration. Before each time the AT sends data to the MCU, it will first use the GPIO18 pin of the Wi-Fi module to wake up the MCU at a high level and hold on the high level for 10 seconds.
AT+USERWKMCUCFG=1,1,18,1,10000,3

// Enable wake-up configuration
AT+USERWKMCUCFG=0
```

--------------------------------

### Start TCP Server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/TCP-IP_AT_Examples.html

Starts a TCP server on the specified port.

```AT
AT+CIPSERVER=1,35
```

```Response
OK
```

--------------------------------

### Example Usage of AT+BLESPPCFG

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Examples showing how to reset, set, and query SPP parameters.

```text
AT+BLESPPCFG=0          // reset Bluetooth LE SPP parameters
AT+BLESPPCFG=1,3,5,3,7  // set Bluetooth LE SPP parameters
AT+BLESPPCFG?           // query Bluetooth LE SPP parameters
```

--------------------------------

### AT+BLEGATTSSETATTR Usage Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence for initializing a server and setting a characteristic value.

```text
AT+BLEINIT=2   // Role: server.
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEGATTSCHAR?
// For example, to set 1 byte of data of the 1st characteristic in the 1st service, use the following command:
AT+BLEGATTSSETATTR=1,1,,1
// After the symbol ">" shows, input 1 byte of data, such as "8". Then the setting starts.
```

--------------------------------

### Example: Discover Primary Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence for initializing a client, connecting, and discovering primary services.

```text
AT+BLEINIT=1   // Role: client
AT+BLECONN=0,"24:12:5f:9d:91:98"
AT+BLEGATTCPRIMSRV=0
```

--------------------------------

### Full AT+USEROTA Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/user_at_commands.html

A complete example showing the command, the prompt, the URL reception, and the final success status.

```text
AT+USEROTA=36

OK

>
Recv 36 bytes

OK
```

--------------------------------

### Firmware Upgrade Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Various examples of using the AT+CIUPDATE command with different parameters for network and version configuration.

```text
AT+CWMODE=1
AT+CWJAP="1234567890","1234567890"
AT+CIUPDATE
AT+CIUPDATE=1
AT+CIUPDATE=1,"v1.2.0.0"
AT+CIUPDATE=1,"v2.2.0.0","mqtt_ca"
AT+CIUPDATE=1,"v2.2.0.0","ota",1
AT+CIUPDATE=1,,,1
AT+CIUPDATE=1,,"ota",1
AT+CIUPDATE=1,"v2.2.0.0",,1
```

--------------------------------

### Read NVS Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples for reading namespaces and specific key-value pairs.

```text
// Read all namespaces
AT+SYSMFG=1

// Read all key-value pairs of client_cert namespace
AT+SYSMFG=1,"client_cert"

// Read the value of client_cert.0 key in client_cert namespace
AT+SYSMFG=1,"client_cert","client_cert.0"
```

--------------------------------

### TCP/SSL Client Passthrough Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples demonstrating various configurations for TCP, SSL, and IPv6 client connections.

```text
AT+SAVETRANSLINK=1,"192.168.6.110",1002,"TCP"
AT+SAVETRANSLINK=1,"www.baidu.com",443,"SSL"
AT+SAVETRANSLINK=1,"240e:3a1:2070:11c0:55ce:4e19:9649:b75",8080,"TCPv6"
AT+SAVETRANSLINK=1,"240e:3a1:2070:11c0:55ce:4e19:9649:b75",8080,"SSLv6"
```

--------------------------------

### UDP Passthrough Mode Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples for enabling UDP and UDPv6 passthrough modes.

```text
AT+SAVETRANSLINK=1,"192.168.6.110",1002,"UDP",1005
AT+SAVETRANSLINK=1,"240e:3a1:2070:11c0:55ce:4e19:9649:b75",8081,"UDPv6",1005
```

--------------------------------

### Configure and Start Advertising

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/bluetooth_le_at_examples.html

Set advertising parameters, data, and start the advertising process.

```text
AT+BLEADVPARAM=50,50,0,0,7,0,,
```

```text
OK
```

```text
AT+BLEADVDATA="0201060A09457370726573736966030302A0"
```

```text
OK
```

```text
AT+BLEADVSTART
```

```text
OK
```

--------------------------------

### Set Wi-Fi Mode Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Example command to set the device to SoftAP+Station mode.

```text
AT+CWMODE=3
```

--------------------------------

### Example: Discover BLE Characteristics

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence to initialize a client, connect, list services, and discover characteristics.

```text
AT+BLEINIT=1   // Role: client
AT+BLECONN=0,"24:12:5f:9d:91:98"
AT+BLEGATTCPRIMSRV=0
AT+BLEGATTCCHAR=0,1 // set a specific index according to the result of the previous command
```

--------------------------------

### Example Bluetooth LE Device Name Configuration

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example of setting the device name to 'esp_demo'.

```text
AT+BLENAME="esp_demo"
```

--------------------------------

### Initialize SSL server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/TCP-IP_AT_Examples.html

Starts the SSL server on the specified port.

```AT Command
AT+CIPSERVER=1,8070,"SSL"
```

```Response
OK
```

--------------------------------

### Deinitialize Wi-Fi Driver Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Example command to deinitialize the Wi-Fi driver to free up RAM.

```text
// Deinitialize Wi-Fi driver
AT+CWINIT=0
```

--------------------------------

### Example: Configure SNTP Server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Examples of enabling the SNTP server with various time zone formats.

```text
// Enable SNTP server, set timezone to China (UTC+08:00)
AT+CIPSNTPCFG=1,8,"cn.ntp.org.cn","ntp.sjtu.edu.cn"
or
AT+CIPSNTPCFG=1,800,"cn.ntp.org.cn","ntp.sjtu.edu.cn"

// Enable SNTP server, set timezone to New York of the United States (UTC–05:00)
AT+CIPSNTPCFG=1,-5,"0.pool.ntp.org","time.google.com"
or
AT+CIPSNTPCFG=1,-500,"0.pool.ntp.org","time.google.com"

// Enable SNTP server, set timezone to New Zealand (Chatham Islands, UTC+12:45)
AT+CIPSNTPCFG=1,1245,"0.pool.ntp.org","time.google.com"
```

--------------------------------

### TCP/SSL Server Passthrough Workflow Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

A complete workflow example including SoftAP configuration, setting the passthrough mode, and restarting the module.

```text
// Set Wi-Fi SoftAP information, SSID is esp-ap-001, no password, channel 11, open encryption, maximum 3 connections
AT+CWSAP="esp-ap-001","",11,0,3

// Set to enter TCP server passthrough mode on power-up, listening on port 1002
AT+SAVETRANSLINK=3,1002,"TCP",2

// Restart the module
AT+RST

// PC connects to esp-ap-001 and uses a TCP client tool to connect to ESP32's port 1002
nc 192.168.4.1 1002

// Transmit data in passthrough mode
```

--------------------------------

### Example: Initialize Server and Create Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Demonstrates setting the device role to server and creating services.

```text
AT+BLEINIT=2   // Role: server
AT+BLEGATTSSRVCRE
```

--------------------------------

### Wi-Fi Reconnection Configuration Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Examples demonstrating different reconnection strategies, including interval settings and immediate reconnection triggers.

```AT Command
// The ESP32 station tries to reconnect to AP at the interval of one second for 100 times.
AT+CWRECONNCFG=1,100

// The ESP32 station will not reconnect to AP when disconnected.
AT+CWRECONNCFG=0,0

// Start reconnecting to the AP immediately after the command is set.
AT+CWRECONNCFG=2,50,1
```

--------------------------------

### Establish Classic Bluetooth SPP Connection Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BT_AT_Commands.html

Example command to establish an SPP connection with no security.

```text
AT+BTSPPCONN=0,0,"24:0a:c4:09:34:23"
```

--------------------------------

### AT+BTSPPSTART

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BT_AT_Commands.html

Starts the Classic Bluetooth SPP profile.

```APIDOC
## AT+BTSPPSTART

### Description
Starts the Classic Bluetooth SPP profile.

### Command
AT+BTSPPSTART

### Response
OK
```

--------------------------------

### Handle Optional Parameters in Setup Command

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_add_user-defined_AT_commands.html

Implementation of a setup command that checks for omitted parameters using ESP_AT_PARA_PARSE_RET_OMITTED.

```c
uint8_t at_setup_cmd_test(uint8_t para_num)
{
    int32_t para_int_1 = 0;
    int32_t para_int_2 = 0;
    uint8_t *para_str_3 = NULL;
    uint8_t *para_str_4 = NULL;
    uint8_t num_index = 0;
    uint8_t buffer[64] = {0};
    esp_at_para_parse_ret_t parse_result = ESP_AT_PARA_PARSE_RET_OK;

    snprintf((char *)buffer, 64, "this cmd is setup cmd and cmd num is: %u\r\n", para_num);
    esp_at_port_write_data(buffer, strlen((char *)buffer));

    parse_result = esp_at_get_para_as_digit(num_index++, &para_int_1);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
        return ESP_AT_RESULT_CODE_ERROR;
    } else {
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "first parameter is: %d\r\n", para_int_1);
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    parse_result = esp_at_get_para_as_digit(num_index++, &para_int_2);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OMITTED) {
        if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
            return ESP_AT_RESULT_CODE_ERROR;
        } else {
            // sample code
            // user needs to customize the operation
            memset(buffer, 0, 64);
            snprintf((char *)buffer, 64, "second parameter is: %d\r\n", para_int_2);
            esp_at_port_write_data(buffer, strlen((char *)buffer));
        }
    } else {
        // sample code
        // the second parameter is omitted
        // user needs to customize the operation
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "second parameter is omitted\r\n");
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    parse_result = esp_at_get_para_as_str(num_index++, &para_str_3);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OMITTED) {
        if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
            return ESP_AT_RESULT_CODE_ERROR;
        } else {
            // sample code
            // user needs to customize the operation
            memset(buffer, 0, 64);
            snprintf((char *)buffer, 64, "third parameter is: %s\r\n", para_str_3);
            esp_at_port_write_data(buffer, strlen((char *)buffer));
        }
    } else {
        // sample code
        // the third parameter is omitted
        // user needs to customize the operation
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "third parameter is omitted\r\n");
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    parse_result = esp_at_get_para_as_str(num_index++, &para_str_4);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
        return ESP_AT_RESULT_CODE_ERROR;
    } else {
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "fourth parameter is: %s\r\n", para_str_4);
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    return ESP_AT_RESULT_CODE_OK;
}
```

--------------------------------

### AT+BLESCAN Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Various examples demonstrating how to start and stop scanning with different filter configurations.

```text
AT+BLEINIT=1    // Role: client
AT+BLESCAN=1    // start scanning
AT+BLESCAN=0    // stop scanning
AT+BLESCAN=1,3,1,"24:0A:C4:96:E6:88"  // start scanning, filter type is MAC address
AT+BLESCAN=1,3,2,"ESP-AT"  // start scanning, filter type is device name
AT+BLESCAN=1,3,3,"FF01"  // start scanning, filter type is UUID
AT+BLESCAN=1,3,4,-50  // start scanning, filter type is RSSI
AT+BLESCAN=1,3,1,"24:0A:C4:96:E6:88",1  // start scanning, filter type is MAC address, perform duplicate check
```

--------------------------------

### Example Bluetooth LE Address Configurations

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Examples for setting static, private, and public device addresses.

```text
AT+BLEADDR=1,"f8:7f:24:87:1c:7b"    // Set Random Device Address, Static Address
AT+BLEADDR=1                        // Set Random Device Address, Private Address
AT+BLEADDR=0                        // Set Public Device Address
```

--------------------------------

### Example: Read BLE Characteristics

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence to initialize a client, connect, and read a specific descriptor value.

```text
AT+BLEINIT=1   // Role: client.
AT+BLECONN=0,"24:12:5f:9d:91:98"
AT+BLEGATTCPRIMSRV=0
AT+BLEGATTCCHAR=0,3 // Set a specific index according to the result of the previous command.
// For example, to read 1st descriptor of the 2nd characteristic in the 3rd service, use the following command:
AT+BLEGATTCRD=0,3,2,1
```

--------------------------------

### Query mDNS Services Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Example of publishing a service via avahi-publish and querying it using the AT+MDNS command.

```text
// Publish mDNS service on PC using avahi-publish
avahi-publish -s my_instance _my_printer._tcp 35 "version=v4.1.0.0"

// Query PTR records in the local network via AT command
AT+MDNS=2,0,"_my_printer","_tcp"

// Response result
+MDNS:234,
IF=1
IP=0
PTR=my_instance
SRV=espressif-1.local:35
TXT=version=v4.1.0.0
A=192.168.200.249
AAAA=240e:1234:204c:bd02:d80f:8c45:3576:2574
AAAA=240e:1234:204c:bd02:f043:47f0:7c39:0002
AAAA=240e:1234:204c:bd02:2971:f412:14c6:fa00

OK

// Disable mDNS function
AT+MDNS=0
```

--------------------------------

### Start SmartConfig

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/network_provisioning_examples.html

Initiates SmartConfig provisioning with a specific AES key.

```text
AT+CWSTARTSMART=4,0,"1234567890123456"
```

```text
OK
```

--------------------------------

### Implement Setup Command with Optional Parameter

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_add_user-defined_AT_commands.html

C function demonstrating how to parse parameters and handle cases where the final string parameter is omitted.

```c
uint8_t at_setup_cmd_test(uint8_t para_num)
{
    int32_t para_int_1 = 0;
    uint8_t *para_str_2 = NULL;
    uint8_t *para_str_3 = NULL;
    uint8_t num_index = 0;
    uint8_t buffer[64] = {0};
    esp_at_para_parse_ret_t parse_result = ESP_AT_PARA_PARSE_RET_OK;

    snprintf((char *)buffer, 64, "this cmd is setup cmd and cmd num is: %u\r\n", para_num);
    esp_at_port_write_data(buffer, strlen((char *)buffer));

    parse_result = esp_at_get_para_as_digit(num_index++, &para_int_1);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
        return ESP_AT_RESULT_CODE_ERROR;
    } else {
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "first parameter is: %d\r\n", para_int_1);
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    parse_result = esp_at_get_para_as_str(num_index++, &para_str_2);
    if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
        return ESP_AT_RESULT_CODE_ERROR;
    } else {
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "second parameter is: %s\r\n", para_str_2);
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    }

    if (num_index == para_num) {
        memset(buffer, 0, 64);
        snprintf((char *)buffer, 64, "third parameter is omitted\r\n");
        esp_at_port_write_data(buffer, strlen((char *)buffer));
    } else {
        parse_result = esp_at_get_para_as_str(num_index++, &para_str_3);
        if (parse_result != ESP_AT_PARA_PARSE_RET_OMITTED) {
            if (parse_result != ESP_AT_PARA_PARSE_RET_OK) {
                return ESP_AT_RESULT_CODE_ERROR;
            } else {
                // sample code
                // user needs to customize the operation
                memset(buffer, 0, 64);
                snprintf((char *)buffer, 64, "third parameter is: %s\r\n", para_str_3);
                esp_at_port_write_data(buffer, strlen((char *)buffer));
            }
        } else {
            // sample code
            // the third parameter is omitted
            // user needs to customize the operation
            memset(buffer, 0, 64);
            snprintf((char *)buffer, 64, "third parameter is omitted\r\n");
            esp_at_port_write_data(buffer, strlen((char *)buffer));
        }
    }

    return ESP_AT_RESULT_CODE_OK;
}
```

--------------------------------

### Bluetooth LE Encryption Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Full sequence of commands to initialize, configure, and start encryption.

```text
AT+RESTORE
AT+BLEINIT=2
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEADDR?
AT+BLESECPARAM=1,0,16,3,3
AT+BLESETKEY=123456
AT+BLEADVSTART
// Use your Bluetooth LE debugging app as a client to establish a Bluetooth LE connection with the ESP32
AT+BLEENC=0,3
```

--------------------------------

### Example: Stop BLE GATTS Service

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Sequence to initialize the server, create, start, and then stop a service.

```text
AT+BLEINIT=2   // Role: server
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVSTART
AT+BLEGATTSSRVSTOP
```

--------------------------------

### Example: Discover Included Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example sequence for discovering included services after identifying primary service indices.

```text
AT+BLEINIT=1   // Role: client
AT+BLECONN=0,"24:12:5f:9d:91:98"
AT+BLEGATTCPRIMSRV=0
AT+BLEGATTCINCLSRV=0,1  // set a specific index according to the result of the previous command
```

--------------------------------

### AT+CWLAPOPT Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Examples demonstrating how to configure print masks and authentication mode filters for the AT+CWLAP command.

```text
// The first parameter is reserved;
// The second parameter is 31, namely 0x1F, meaning that the corresponding bits of <print mask> are set to 1. All parameters will be shown in the result of AT+CWLAP.
AT+CWLAPOPT=,31
AT+CWLAP

// Just show the AP which authmode is OPEN
AT+CWLAPOPT=,31,-100,1
AT+CWLAP
```

--------------------------------

### AT+CIPSERVER

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/sysmfg_at_examples.html

Starts an SSL server using certificates stored in the manufacturing partition.

```APIDOC
## AT+CIPSERVER

### Description
Starts an SSL server. If certificates are present in the manufacturing partition, they are automatically used for the SSL handshake.

### Command Syntax
AT+CIPSERVER=1,<port>,"SSL"[,<CA_enable>]

### Parameters
- **port** (int) - The port to listen on (e.g., 8883).
- **CA_enable** (int) - Optional. Set to 1 to enable CA verification for mutual authentication.
```

--------------------------------

### Initialize TCP Server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/TCP-IP_AT_Examples.html

Starts the TCP server on the default port 333.

```text
AT+CIPSERVER=1
```

```text
OK
```

--------------------------------

### AT+BTSTARTDISC

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BT_AT_Commands.html

Starts the Classic Bluetooth discovery process to find nearby devices.

```APIDOC
## AT+BTSTARTDISC

### Description
Initiates the Classic Bluetooth discovery process with specified inquiry parameters.

### Parameters
- **<inq_mode>** (integer) - Required - 0: General inquiry mode, 1: Limited inquiry mode.
- **<inq_len>** (integer) - Required - Inquiry duration (Range: 0x01 ~ 0x30).
- **<inq_num_rsps>** (integer) - Required - Number of inquiry responses to receive (0 for unlimited).

### Response
Returns device information including: <bt_addr>, <dev_name>, <major_dev_class>, <minor_dev_class>, <major_srv_class>, <rssi>.

### Request Example
AT+BTSTARTDISC=0,10,10
```

--------------------------------

### Example: Configure Server with Max Connections

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Sets up a server with a maximum of 2 connections.

```text
AT+CIPMUX=1
AT+CIPSERVERMAXCONN=2
AT+CIPSERVER=1,80
```

--------------------------------

### Start Advertising

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/bluetooth_le_at_examples.html

Initiates the advertising process for the ESP32 server.

```AT Command
AT+BLEADVSTART
```

--------------------------------

### SPI Driver Initialization Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Driver_AT_Commands.html

Demonstrates initializing the SPI driver with specific parameters and deleting the driver.

```text
AT+DRVSPIINIT=102400,0,0,0,0,3 // SPI clock: 100 kHz; mode: 0; both command and address bits are 0; not use DMA; transmit and receive LSB first
OK
AT+DRVSPIINIT=0   // delete SPI Driver
OK
```

--------------------------------

### AT+BLEHIDKB Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example usage to input the character 'a'.

```text
AT+BLEHIDKB=0,4,0,0,0,0,0   // input the string "a"
```

--------------------------------

### Build the Project

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_clone_project_and_compile_it.html

Compile the project firmware.

```bash
./build.py build
```

```bash
python build.py build
```

--------------------------------

### Configure GATT Server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/bluetooth_le_at_examples.html

Create and start services on the Bluetooth LE server.

```AT Command
AT+BLEGATTSSRVCRE
```

```AT Command
AT+BLEGATTSSRVSTART
```

--------------------------------

### AT+BLEHIDMUS Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Example usage for sending mouse movement data.

```text
AT+BLEHIDMUS=0,10,10,0
```

--------------------------------

### Example Usage of AT+CWSTARTSMART

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Sets the device to station mode and initiates the SmartConfig process.

```text
AT+CWMODE=1
AT+CWSTARTSMART
```

--------------------------------

### Flash Partition Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples for erasing and writing to the mfg_nvs partition.

```text
// erase the "mfg_nvs" partition in its entirety.
AT+SYSFLASH=0,"mfg_nvs",4096,8192

// write a new "mfg_nvs" partition (size: 0x1C000) at offset 0 of the "mfg_nvs" partition.
AT+SYSFLASH=1,"mfg_nvs",0,0x1C000
```

--------------------------------

### Start Bluetooth LE Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/bluetooth_le_at_examples.html

Starts the previously created GATT services.

```AT
AT+BLEGATTSSRVSTART
```

```text
OK
```

--------------------------------

### Test AT Startup

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Verifies that the module is responsive to AT commands.

```text
AT
```

```text
OK
```

--------------------------------

### AT+CWLAP Usage Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Wi-Fi_AT_Commands.html

Examples of searching for APs with specific parameters or just by SSID.

```text
AT+CWLAP="Wi-Fi","ca:d7:19:d8:a6:44",6,0,400,1000

// Search for APs with a designated SSID:
AT+CWLAP="Wi-Fi"
```

--------------------------------

### Erase NVS Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/Basic_AT_Commands.html

Examples for erasing namespaces or specific key-value pairs.

```text
// Erase all key-value pairs of client_cert namespace (That is, erase all client certificates)
AT+SYSMFG=0,"client_cert"

// Erase the client_cert.0 key-value pair of client_cert namespace (That is, erase the first client certificate)
AT+SYSMFG=0,"client_cert","client_cert.0"
```

--------------------------------

### Set Up SSL Server

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/TCP-IP_AT_Examples.html

Initializes the SSL server on the specified port.

```text
AT+CIPSERVER=1,8070,"SSL",1
```

```text
OK
```

--------------------------------

### Start GATTS Services

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Commands to start all services or a specific service by index.

```text
AT+BLEGATTSSRVSTART
```

```text
AT+BLEGATTSSRVSTART=<srv_index>
```

--------------------------------

### Start Classic Bluetooth SPP Profile

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/classic_bluetooth_at_examples.html

Starts the SPP profile service.

```text
AT+BTSPPSTART
```

```text
OK
```

--------------------------------

### SNTP Interval Configuration Example

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Example of configuring the SNTP interval to one hour.

```text
AT+CIPSNTPCFG=1,8,"cn.ntp.org.cn","ntp.sjtu.edu.cn"

OK

// synchronize SNTP time every hour
AT+CIPSNTPINTV=3600

OK
```

--------------------------------

### Example: Configure BLE Scan Parameters

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/BLE_AT_Commands.html

Initializes the device as a client and sets specific scanning parameters.

```text
AT+BLEINIT=1   // Role: client
AT+BLESCANPARAM=0,0,0,100,50
```

--------------------------------

### Example: Configure MQTT ALPN

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/MQTT_AT_Commands.html

Complete sequence to configure and connect using MQTT ALPN.

```text
AT+CWMODE=1
AT+CWJAP="ssid","password"
AT+CIPSNTPCFG=1,8,"ntp1.aliyun.com","ntp2.aliyun.com"
AT+MQTTUSERCFG=0,5,"ESP32","espressif","1234567890",0,0,""
AT+MQTTALPN=0,2,"mqtt-ca.cn","mqtt-ca.us"
AT+MQTTCONN=0,"192.168.200.2",8883,1
```

--------------------------------

### Start Music Playback

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Examples/classic_bluetooth_at_examples.html

Sends the command to start audio playback via A2DP.

```text
AT+BTA2DPCTRL=0,1
```

```text
OK
```

--------------------------------

### Example Usage of AT+CIPSSLCCIPHER

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Examples for setting cipher suites in both single and multiple connection modes.

```text
// Single connection: (AT+CIPMUX=0), cipher suites are TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 and TLS_ECDHE_ECDSA_WITH_AES_256_CCM
AT+CIPSSLCCIPHER=2,0xC023,0xC0AD

// Multiple connections: (AT+CIPMUX=1), cipher suites are TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 and TLS_ECDHE_ECDSA_WITH_AES_256_CCM
AT+CIPSSLCCIPHER=0,2,0xC023,0xC0AD
```

--------------------------------

### UDP Transmission Examples

Source: https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Command_Set/TCP-IP_AT_Commands.html

Various examples of establishing UDP unicast, multicast, and time-synced connections.

```text
// UDP unicast
AT+CIPSTART="UDP","192.168.101.110",1000,1002,2
AT+CIPSTART="UDP","192.168.101.110",1000,,,"192.168.101.100"

// Establish UDP transmission with pool.ntp.org, set 5-second timeout
AT+CIPSTART="UDP","pool.ntp.org",123,,,,5000

// UDP unicast based on IPv6 network
AT+CIPSTART="UDPv6","fe80::32ae:a4ff:fe80:65ac",1000,,,"fe80::5512:f37f:bb03:5d9b"

// UDP multicast based on IPv6 network
AT+CIPSTART="UDPv6","FF02::FC",1000,1002,0
```
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