USB TTL Dat

  • Green = TX
  • White = Rx
  • Red = VCC
  • Black = GND

Product links

  • PL2303 - https://www.electrodragon.com/product/pl2303ta-usb-ttl-usb-serial-cable-win-88-1-compatible/

Use case

for ESP32 or ESP8266 :

  • TXD -> RXD
  • RXD -> TXD
  • 5V -> 5V
  • GND -> GND.
  • Connect IO0 to GND, and then power up to enter into programming mode

troubleshooting checklist

reverse TX RX in case wrong wiring of communication

software com-monitor-dat

other interface