Using Freematics ONE molex port for something other than gps

[vatic42]

Hello,

I have a Freematics ONE. I'd like to use the tx and rx pins on the molex port for something other than gps. Mainly I just want to set and hold them high or low based on a condition, and use that pin to trigger a relay elsewhere in the vehicle.

I've tried the COBDSPI::ioConfig/ioWrite, but that doesn't seem to work. I understand they are connected to the STM controller based on the schematic... where is the control set for that controller?

Any thoughts or ideas?

Thanks,
Matt

[stanley]

ESP32's GPIO 26 and 34 are connected to molex port of ONE+ and you can use them for any purposes.

[vatic42]

I have a Freematics ONE, not the +. Is it the same in both models?

[stanley]

Freematics ONE has PC0/PC1 (A0/A1 in Arduino's context) available on the soldering pad located at top left of PCB as picture below.