V0

red box

  • data communication LED indicator
  • spare pins
  • EN button and flash button IO10
  • power LED
  • flash button programmable LED

yello box

  • Power input

Green Box

  • USB A native USB
  • micro USB native USB, same

Blue box

  • jumper, RS232 / RS485 output selector
  • GND / +5V
  • DB9 connector, includes a jumper selector for pin2
  • cable terminal output RS232 / RS485,

V1

  • set red jumpers for RS485
  • set blue jumpers for RS232

Design logs

added

  • power protection

not added

  • 2.1mm barrel plug

demo vidoe

  • https://www.youtube.com/shorts/bP3zJOAH-PU
  • https://www.youtube.com/shorts/yHJsV8njQ3E
  • https://www.youtube.com/shorts/BCYFG2o0iMA
  • https://www.youtube.com/shorts/9svPSDBRmKE

ref