Freematics Forum

Did you modify the datalogger sketch or just used ours?

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Can you compare with what is happening with Arduino?

Since more than a year ago, we have upgraded I2C version (model B). So now it only has 4 wires.

You mean it works for a very short time after plugged in?

In current implementation of OBD library, only mode 01 is handled. You can though send "0902\r" to request for the VIN data and parse it.

Setting echo off does not mean there will be no response. Echo is regarding to the sending back of the received bytes.
ATZ does a lot work including initialization and that's why it's slow. You can send ATV for getting version information.

Can you try this configuration first:

The majority of users have no problem compiling the sketch. I really don't know why you have these errors.

What's the OBD time (polling interval) you got?