Freematics Forum

I got it to work, though the OBD communication is still shaky (it takes several tries for obd.init to succeed). For whatever reason I can only make one reliable obd.read() call per loop. I only need PID_RUNTIME, so I removed PID_RPM and things seem to work.

After lots of work I've achieved some shaky communication, by looping through protocols and hitting on the right one: void setup() { obd.begin(); conn=obd.init(); if (!conn) { for (int i=0; i<4; i++) { if (i==0) obd.setProtocol(PROTO_CAN_11B_500K); else if (i==1) obd.setProtocol(PROTO_CAN_11B_250K);...

My car was bought new in 2010 in the US, so it uses the ISO 15765 CAN. Quote: "2008: All cars sold in the United States are required to use the ISO 15765-4 signaling standard (a variant of the Controller Area Network (CAN) bus)." ( Source: http://en.wikipedia.org/wiki/On-board_diagnostics ...

Downloaded the new lib, recompiled, uploaded to Arduino, same thing: it gets stuck on obd.init().

Nothing connected to Tx/Rx on Arduino. Yellow lead from I2C Adapter plugged into SCL, blue into SDA, power red/blue to Vin/GND. The power from OBD seems to work, as Arduino boots up.

We have a problem here. I see several messages about the I2C Adapter not working, which are being shrugged off. My freshly bought I2C Adapter Model B doesn't work. To verify that everything is OK with OBD in my car I used two independent tools: a MaxiScan LCD scanner and a Bluetooth OBD adapter that...

In the emulator GUI, could you implement an option to automatically increase the "Time Since Engine Start" clock every second since the "Ignition" button was last clicked, as it would happen in real life? I have a sequence of events dependent on this time and it would be much eas...

I just got the ODB-II Model B adapter. This page http://arduinodev.com/hardware/obd-kit/ tells me to connect the yellow/blue wires to SCL/SDA pins. The adapter I got has black/red and yellow/white connectors. I assume the yellow is to be connected to SCL and the white to SDA, correct?

Thanks. One more question... I'd like to debug my Arduino code at home, using an OBD emulator. Given that the Rx/Tx connectors need to be plugged in for this model to work, is there any way to print out debug messages through the serial port in Arduino's IDE? I assume that when the Rx/Tx ports on th...

I have 3 pairs of connectors: red/black (I assume it's +5V/GND), blue/yellow (I assume it's SDA/SCL) and white/green (I assume it's Rx/Tx). Images of my unit and connectors enclosed. http://imageshack.com/a/img674/2110/jLVOM4.jpg http://imageshack.com/a/img661/4148/nzbqZ5.jpg