- 1 (Waveshare) ESP32-C3-Zero or clone.
- 1 RJ12 connector and cable (6 wires)
- 1 Resistor in the range 1 - 4 kΩ is recommended.
- Optionally, hot melt glue and large heat shrink tubing.
Connect according to this image:
It is fairly likely that the internal pull-up resistor will not be effective at the data rates used by the serial communication. Adding an external pull-up resistor between 3.3V and GPIO1 will avoid the risk of having to troubleshoot a likely problem:
Some hot-melt glue and heat shrink tubing will make it more robust:
