Using Freematics ONE molex port for something other than gps

Discussion about software developed by Freematics, including Freematics Builder and Freematics Emulator GUI
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vatic42
Posts: 2
Joined: Thu Mar 03, 2022 9:49 am

Using Freematics ONE molex port for something other than gps

Post by 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
Site Admin
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Joined: Sat Mar 01, 2014 3:15 am

Re: Using Freematics ONE molex port for something other than gps

Post by stanley »

ESP32's GPIO 26 and 34 are connected to molex port of ONE+ and you can use them for any purposes.
vatic42
Posts: 2
Joined: Thu Mar 03, 2022 9:49 am

Re: Using Freematics ONE molex port for something other than gps

Post by vatic42 »

I have a Freematics ONE, not the +. Is it the same in both models?
stanley
Site Admin
Posts: 968
Joined: Sat Mar 01, 2014 3:15 am

Re: Using Freematics ONE molex port for something other than gps

Post by 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.
Image
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