• TCP communication
• MQTT communication
• Connecting to a microcontroller
• Mobile APP development - communicating with STM32 - MQTT

Basic Info

The ESP8266 itself:

Wiring is as follows:

Connecting to WiFi

Command	Response	Purpose
AT+UART=115200,8,1,0,0	OK	Set the baud rate
AT	OK	Test whether AT commands are available
AT+RST	OK, then init info	Restart the ESP8266
AT+GMR	Version info	Check the firmware version
AT+CWMODE=1	OK	Set the WiFi mode (STA mode) The ESP8266 can act as a client (STA), a hotspot (AP), or both at once (AP+STA). 0 turns WiFi off, 1 is STA mode, 2 is AP mode, 3 is AP+STA mode
AT+CWJAP="name","password"	WIFI CONNECTED WIFI GOT IP OK	Connect to WiFi
AT+CWJAP?	+CWJAP:"your WiFi name","xx:xx:xx:xx:xx:xx",channel,signal_strength	Check the connection status (verify the connection succeeded)
AT+CIFSR	+CIFSR:STAIP,"192.168.1.100" +CIFSR:STAMAC,"a4:e5:7c:26:1a:3f" OK	Get the assigned IP
AT+CWQAP	OK	Disconnect from WiFi