WiFi Module to Serial Port Test Expansion Board Adapter Board ESP-01S Compatible with ESP8266 for Arduino

Introduce This is an expansion board suitable for ESP 01S WiFi module After power on the module is in BOOT flash mode and AT command test can be performed directly through the serial port on the expansion board If you want to burn the firmware first press and hold the Flash key on the expansion board and then click to burn in the burning software interface and then press the RST key of the expansion board After releasing the Flash key the module will enter the download mode and start burning record firmware Technical Parameter Working voltage DC 5VWorking current minimum 500mASize 24 41 3 11 9mmCommunication voltage 3 3VExpanding boardUSB to serial port module FT232 module GNDGNDVCC5VTXRXRXTXPackage includes 1 x expansion board with cableInstructions 1 AT command setting methodWhen setting the AT command we also need to use a USB to serial port module FT232 module an ESP8266 WIFI module KS0339 and use a mini USB cable to connect to the computer After the connection is successful open the ESP8266 debugging tool select the baud rate of 115200 click to open the serial port click to test AT the data receiving window will output OK other AT settings the method is similar 2 Firmware burning methodWhen burning the firmware we also need to use a USB to serial port module FT232 module one by one ESP8266 WIFI module KS0339 and use the mini USB cable to connect to the computer After installing the firmware you can enter the corresponding software to