DC 7-28V / 5V ESP8266 WIFI 8 Kanal Relais Modul ESP-12F Entwicklungsboard
14,31 €
Programming port: ESP8266's GND, RX, TX, 5V are respectively connected to the GND, TX, RX, 5V of the external TTL serial port module. IO0 needs to be connected to GND when downloading, and then disconnect the connection between IO0 and GND after the download is complete;.
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