- Tue Aug 12, 2014 10:12 am
#173606
Good Afternoon,
I'm trying to get my OBD-II-UART working with my Arduino but it doesn't seem to receive any serial data that the OBD-II-UART sends.
I've tested the serial code to send data then print out returned data on an LCD and this works when using my serial monitor in the arduino program so I know it's not my arduino or code. However I can send data fine to the OBD-II-UART (since the lights flash to indicate it's been reset when I send ATZ) but no data is read back.
Using my arduino uno board I removed the ATMega to use the board as an FTDI converter and again using the serial monitor was able to send data to the OBD-II-UART fine but again no data is returned. I've got TX-O soldered correctly and similarly RX-I also GND is connected to the board so I can't figure out why the OBD-II-UART can receive data but not send it (even tho the TX light flashes).
Any help would be greatly appreciated,
George.
EDIT: I've also noticed that when using a serial terminal (a different one), when typing commands in the device will return these characters but if I remove the rx wire it will stop echoing these characters. Weird that it does that but won't display any actual data
I'm trying to get my OBD-II-UART working with my Arduino but it doesn't seem to receive any serial data that the OBD-II-UART sends.
I've tested the serial code to send data then print out returned data on an LCD and this works when using my serial monitor in the arduino program so I know it's not my arduino or code. However I can send data fine to the OBD-II-UART (since the lights flash to indicate it's been reset when I send ATZ) but no data is read back.
Using my arduino uno board I removed the ATMega to use the board as an FTDI converter and again using the serial monitor was able to send data to the OBD-II-UART fine but again no data is returned. I've got TX-O soldered correctly and similarly RX-I also GND is connected to the board so I can't figure out why the OBD-II-UART can receive data but not send it (even tho the TX light flashes).
Any help would be greatly appreciated,
George.
EDIT: I've also noticed that when using a serial terminal (a different one), when typing commands in the device will return these characters but if I remove the rx wire it will stop echoing these characters. Weird that it does that but won't display any actual data