Freematics Forum

Software serial is only reliable at 9600bps and the adapter requires 38400bps or higher. I suggest you communicating with PC via software serial or use Arduino Mega or our Freematics Esprit dev board. Both have multiple hardware serial. https://freematics.com/store/?route=product/product&product...

Actually I am working on this to make wifi optional and re-connectable. Auto uploading on connection of wifi is a useful feature but its implementation is not in my list so you are on your own.

Be aware you can't use USB serial as Arduino's hardware serial is connected to the adapter.

Use the latest ESP32 Arduino package in PlatformIO now like following [env:esp32dev] platform = https://github.com/platformio/platform-espressif32.git#feature/arduino-upstream platform_packages = platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.4 board=esp...

Neither model B or model H supports J1850.

Try adding following line after device waking up. I've also committed this change to github. Let me know if it solves your problem.

When you saw OBD is not properly reinitialized, did all subsequent attempts fail?

This issue is fixed in Freematics Builder 1.2.3.

This is likely an issue in the latest ESP32 Arduino core package. Try using PlatformIO instead.
https://freematics.com/forum/viewtopic.php?f=11&t=44751

Can you make sure libraries and core are rebuilt?