Hello, first post here. I purchased an OBD II UART board as part of a digital dashboard project I’m working on but I cannot establish communication with it. In multiple environments I have been unable to reset the board using ATZ or receive any response from it. So far I have tried communicating with it through an Arduino as well as a generic USB UART CP2102 adapter with the board powered by a bench harness and the vehicle. I can see the RX light blink when i send a command in puTTy, but there is never a response.
My main question is this: can I have damaged the board in some way by soldering the pins in badly? This was my first time soldering pin headers and they didn’t look great. There are no bridges between the RX and TX pins, and the ground is..grounding. The RX pin sits at 3.54v and the TX at 3.48 when tested between the pin and ground. At this point I’m ready to buy another one and chalk this up to hamfistedness but I wanted to try a forum post first. Thanks in advance and please let me know what other info i might need to provide.
