Hi all, I'm trying to communicate between a Raspberry Pi (3B, 3B+, 4B) on OpenBSD 6.9 and an Arduino with the built in (GPIO) serial interface. With the Raspi 3B version, the serial interface definitely seems to be work. I can use the console when connecting my laptop to the UART pins of the Raspi and:
boot> set tty com0 Now I do not want to communicate with the Arduino. The tty should not block the serial interface: boot> set tty fb0 However, when I try to use any available serial interface, I always get an error message: # cu /dev/cuaU0 -s 115200 cu: open("/dev/cuaU0"): Device not configured This repeats for all available devices. Has someone successfully used the serial device? Any hints? Thanks Sven