Features: 1. Onboard mature and stable ESP-12F WIFI module, large capacity 4M BYTE FLASH;
2. The I/O port of the WIFI module and the UART program download port are all lead out to facilitate secondary development;
3. Onboard AC-DC switching power supply module, the power supply mode supports AC90-250V/DC7-30V/5v;
4. Onboard WIFI module RST reset button;
5. ESP-12F supports the use of development tools such as ECLIPSE/ARDUIN0 IDE and provides reference programs for the development environment;
6. Onboard 4-channel 5V relays output switching signals, suitable for controlling loads with operating voltages within AC250V/Dc30V;
7. Onboard power indicator, 1 programmable LED and relay indicator.
Interface Description: Programming port: GND, RX, TX, and 5V of ESP8266 are connected to GND, TX, RX, and 5V of the external TTL serial port module respectively. IO0 needs to be