August-31st-2021, 06:43 AM
(This post was last modified: August-31st-2021, 07:26 AM by Armin@netPI.)
But your Node-RED screen shot indicates to me that you set the serial port to name "/dev/ttyUSB" ... but the real USB device is named "/dev/ttyUSB0".
„You never fail until you stop trying.“, Albert Einstein (1879 - 1955)