I bought this board to use with my RPi 3 B+ (with raspbian Stretch)in a project scanning CAN BUS signals off my vehicle using OBDII to DB9 cable.
https://smile.amazon.com/dp/B01JYNHNW6/ ... UTF8&psc=1
I have hooked it up on my RPi, powering it with 5v off the GPIO pin, with TX to GPIO15 (RX) and RX to GPIO14TC. The module powers on for like 2 - 3 seconds and shuts off. Is this normal? Do I have to enable the UART in boot config? Do I need to feed signal to the DB9 connector for it to work?
Thanks in advance.