I have just updated my rpi node red install, using a script - now 1.3.5. Ran through all the errors corrected them, and had to reinstall various items on the palette. Everything is now good except GPIO pins. Even I2c on I2C-0 works correctly from within node red.
However all the GPIO pins show as not available in node red. I have played with them on the command line gpio readall etc - they all work as expected. Node red cannot see them for some reason. I can]t see anything in the logs except this warning comment :-
'[warn] rpi-gpio : Raspberry Pi specific node set inactive'.
Is this a hint perhaps?
Please can anyone suggest where to look next?
(I tend to faff with the command line stuff - following texts and get lost if something doesn't happen as expected. I am a retired engineer but with no real knowledge of this type of OS.)
SOLVED. May thanks.
I discovered python 3.5 was installed so tried running that on the command line and importing the RPi.GPIO module. It worked. I then changed the system python link to point at 3.5, restarted node red and GPIOs are back. Something not right with the python 3.9.5 installation or location I guess.
Not sure why at the moment but it works and the heating is back on.