I'm attempting to convert 5V TX signals from a SparkFun OBD-II UART to 3.3V RX Signals to a SparkFun Artemis RedBoard ATP. I found a schematic to make that happen, rolled up my sleeves and made an awesome soldered solution:
(adding protective electrical tape of course)
When I hook it all up, I can see that the OBD-II UART is receiving requests (no conversion happening there, sending 3.3V signals from RedBoard). However, I'm not seeing anything come back through my custom mess. I was getting data back before with infrequent 5V responses (which I learned I should stop that, and the data was out of whack possibly as a result). So one possibility is that I fried my board.
Before additional trials, does the wiring look correct?
Thanks for taking a look!