I have a sensor which spits out information via serial and I am trying to receive that input on my Raspberry Pi 3 via the serial RX (BCM pin 15).
I'm using the wiringPi library in a C++ program to use the serial interface. I'm fairly certain that my code that reads from the serial device is correct because I was able to use USB serial devices fine.
I am trying to use /dev/ttyAMA0 in the openSerial function, which can be opened successfully. I just can't seem to get any data.
Basically:
- I'm using the BCM pin numbers in wiringPi (
wiringPiSetupGpio) - I have uart enabled in raspi-config
- I have confirmed that I'm getting output from my sensor
- I've double checked my wiring
- I know my code works with USB serial devices
I know it could be something as simple as one wrong connection, but I've checked thoroughly and had some fresh sets of eyes look at it too, so I feel like there might be something else that I'm missing.
Not sure if related:
When I have the RX pin connected to my sensor for a few minutes, the Pi will eventually freeze. I'm not sure exactly what happens when it freezes. My ssh connection will freeze, but I can still see the ethernet light blink when I type.
I was thinking this might be caused by a short or overvoltage, but the behavior seems quite odd.
Edit:
I have everything working now. I removed the console and kbdg sections from my cmdline.txt, and added dtoverlay=pi3-disable-bt to my config.txt. I have narrowed the freezing issue to the ethernet port.
