My Pi 3 is connected to a solar panel system with an USB to RS232 cable. Unfortunately I am unable to receive any data with the Pi so far. I got it working under Windows. What I've checked on my Pi so far:
1) My pi recognizes the device.
root@zonnepaneel:~# lsusb Bus 001 Device 005: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
2) The device is listed as ttyUSB1 and the rights should be sufficient.
root@zonnepaneel:~# dmesg | grep tty [0.000820] console [tty1] enabled [7221.626142] usb 1-1.2: pl2303 converter now attached to ttyUSB1 root@zonnepaneel:~# ls -l /dev/ttyUSB* crw-rw-rw- 1 root tty 188, 1 feb 13 10:11 /dev/ttyUSB1
3) It can be connected with cu (baud rate 9600 is correct).
root@zonnepaneel:~# cu -l /dev/ttyUSB1 -s 9600 --parity=none Connected.
However, no data is displayed. What can I try to make this work?