Page 1 of 1

Help for a beginner hobbyist :) Freematics OBDII can't upload :(

Posted: Tue Mar 14, 2023 3:11 pm
by ercngns
Hi everyone! I checked but could not see a specific thread for introduction etc.. I am a car enthusiast but also a tech head. Couple years back I purchased the Freematics OBDII adapter with motion sensor (I believe it is V2.1 because the cable is un-pluggable). Back then I remember I did couple trials with it for reading and displaying the RPM etc on my Nextion touch screen. I did get it working with simple UI.

So my issue is now that I can not communicate with the Freematics at all. I see under the device manager as "USB-SERIAL CH340" but whatever I tried, AVR Dudes, Arduino IDE, Freematics builder all times out (Via USB connection). I am trying to find a way to maybe flash the Freematics with USBasp but idk the pins on the board for connection etc. Can anyone help me with this?