I'm interfacing a Kern weight scale through serial port with Node-RED. The communication works perfectly in a terminal in both direction.
However, I'm only able to write to the serial port with NR with the "serial out" and "serial request" node but I wasn't successful to get any answer form it with either "serial in" or "serial request" nodes.
For example, when I monitor my serial device with "cat /dev/ttyUSB0" in a terminal while sending a message from NR, I get an answer in the terminal but nothing from within NR, "serial request" node goes in timeout and "serial in" remains mute ...
What am I missing ?
node red: v1.1.3