Freematics Forum

Hello, i discovered that the OBD2 device does need to be connected to the car ECU or to an emulator of the ECU in order to work. There is not way it works without being plugging it into an obd2 socket. And also, i tryied its usage on other cars, and eventually it worked on Seat cars, but not on Kia ...

Hello, Can you compare with what is happening with Arduino? I do not own an Arduino, but i could try with a Teensy 3.0, or with various Freescale or PIC32 boards i have, but i guess the result would be the same, since I checked that the data is really sent properly from the Teensy 3.1 to the OBD2. O...

So you didn't connect adatper's VCC? Yes, i did not connect it to VCC It should work with universal ground. Can you check what Teensy receive from the adapter? Is it in plain text? Yes, the OBD2 adapter is not sending anything. It is like the OBD2 adapter did not receive any data, although i verifi...

So you didn't connect adatper's VCC? It should work with universal ground. Can you check what Teensy receive from the adapter? Is it in plain text? yes, the VCC of the OBD II connector is not attached to anything. The teensy is not receiving anything,i verified it with an oscilloscope. on the other...

Hello Stanley, the VCC of the OBD II adapter is disconnected from anything. On the other hand, the GROUND is connected to the Teensy 3.1 ground pin. One question: i verified that, on the UART, the level of voltage on the TX pin of the Teensy 3.1 is about 3 Volt. Is that ok? Or the OBDII needs an hig...

Hello Stanley, So you didn't connect adatper's VCC? It should work with universal ground. Can you check what Teensy receive from the adapter? Is it in plain text? for additional information, the Teensy serial port is using TTL levels, i.e. it it 3.3Volt level. Is this ok for the OBD II adapter? Whic...

So you didn't connect adatper's VCC? It should work with universal ground. Yes, the VCC of the OBD II adapter is not connected to anything. Is there away to modify the OBD II adapter in order to output 5 Volt instead of 3.3Volt? Can you check what Teensy receive from the adapter? Is it in plain tex...

Hello, I bought an OBD II adapter MODEL A (UART) 3.3 Volt (I ordered the 5Volt one, but something got wrong :/), and I connected my Teensy 3.1 to the OBD II adapter using this schema: Teensy 3.1 RX1 <---> TX Arduino OBD II Teensy 3.1 TX1 <---> RX Arduino OBD II Teensy 3.1 GND <==> GND Arduino OBD II...