Hi - new to everything (raspberry pi, python, node-red) but some experience with i2c
I have built a board for my Pi that has a number of i2c devices (RTC, ADC, DAC and I/O expansion) - I have all of these working in python via thonny
I'm working on getting them working (specifically the I/O, ADC and DAC) with Node-Red
I ran i2cdetect -y 1 straight after a reboot and can clearly see 4 i2c parts (0x0c, 0x20, 0x4d and 0x68 in the table (0x20 (decimal 32) is the PCF8574 I/O expansion chip I'm working on for the moment) - (I can confirm that this part works fine in Python on this address)
I've installed
npm install --unsafe-perm node-red-contrib-i2c
In ~/.node-red of my pi - as instructed here
I have this flow to start with
[{"id":"78223869.732038","type":"tab","label":"Flow 4","disabled":false,"info":""},{"id":"d2a792fc.0850c","type":"debug","z":"78223869.732038","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":390,"y":100,"wires":[]},{"id":"e72af964.8aa9c8","type":"inject","z":"78223869.732038","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":80,"y":140,"wires":[["8d06713c.e47d4"]]},{"id":"bbf568e2.860b78","type":"debug","z":"78223869.732038","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":390,"y":180,"wires":[]},{"id":"8d06713c.e47d4","type":"i2c scan","z":"78223869.732038","name":"","busno":"1","x":240,"y":140,"wires":[["d2a792fc.0850c"],["bbf568e2.860b78"]]}]
My debug output appears to show nothing of value like this
Once I run that - if I try i2cdetect -y 1 again, I see this (which is puzzling)
It seems quite hard to find any clear instruction about how to use the i2c nodes (but I am a newbie and a bit thick - so that could just be me)
If anyone could help me make any sens of this I would be really grateful. Thanks in advance
BTW - what is the correct term for a board on which the Pi is fitted (as opposed to a HAT which is fitted to the Pi)? I've built my own development board and I'm not sure if that would be called a boot, sole, foot or some other equally odd name?
