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Identify all UART pins with a single script. You won't need a multimeter ever again.
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Latest commit db8d635 Jun 18, 2019
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PinNinja Output abstraction Jun 18, 2019 Update Jun 18, 2019


you won't need a multimeter ever again

Identify all UART pins by flashing a simple script.


  • Flash the script to an Uno.
  • Connect the UART Pins to A0,A1,A2,A3 in any order.
  • Switch on the device.
  • Connect the Arduino to your PC.
  • Open up the Serial Monitor.
  • See the magic happen.

Sample output

This has been tested on a couple of routers and on an ESP8266 with 100% success rate.

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