SimpleRTK2B to a raspberry pi via serial not working

Q&A forumCategory: QuestionsSimpleRTK2B to a raspberry pi via serial not working
deerefanatic asked 1 month ago

Hello, I have a SimpleRTK2B that I’ve connected to a raspberry Pi 3 via soldered short wires directly from the tx1 rx1 pins on the RTK2B to the rx/tx pins on the GPIO. I made sure to wire tx-rx rx-tx, but when I open the serial port, I get nothing, no messages. if I connect the usb port and open the USB tty interface, I get messages. I’ve already run the raspi-config tool to turn off the console via serial function of the pi. Any ideas?

Ardusimple Staff replied 1 month ago

Hi deerefanatic,
could you confirm:
1. That simpleRTK2B ground is connected to RPi ground?
2. That you enabled TX1/RX1 by connecting IOREF to the desired voltage?

2 Answers
clive1 answered 1 month ago

GPIO14 to RX1 / GPIO15 from TX1?
The RPi 3 has some issue about how they map these pins vs the BlueTooth
Also need to kill the getty task which keeps stealing the TTY (/dev/serial0)
sudo systemctl stop serial-getty@ttyAMA0.service
sudo systemctl disable serial-getty@ttyAMA0.service

deerefanatic answered 1 month ago

Thanks! it was the IOREF pin. I attached it to the 3.3v line from the pi and it works great now.

Ardusimple Staff replied 1 month ago

Thanks for the confirmation, we close this ticket.