ESP8266 WiFi 4 Channel 30A Relay Module DC 7-28V 5V ESP-12F Development Board
17,36 €
GND, Rx, TX and 5V of esp8266 record and write port are respectively connected with GND, TX, RX and 5V of external TTL serial port module. Nano Sheild. Mature and stable esp-12f WiFi module on board, large capacity 4m Byte Flash.
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