I am really struggling with this one. I want to attach multiple (5 or so would be nice) DS18B20 sensors (3 meter cable), but I can't get more than two to function. Two will show up in the devices folder with their proper address, but once I attach more this is all I get:
I have tried so many things, 3.3v, 5v, parasitic mode, all to no avail.
I attached all sensors one at a time, and they all showed up.
I got a new raspberry Pi, same thing.
- I have a 47k Ohm resistor from + to data.
- Tried a stronger power source for the raspberry (2.5A instead of 2A), no change.
Since the sensors worked when attached by one by one, I am assuming that the wiring is correct.
Here's a pic of the wiring nonetheless:
As you can see I am using Wago connectors instead of a breadboard. From left to right: ground (goes to the ground pin obviously), data (goes to gpio 4, pin 7), and 5v/3v. The 47k ohm resistor connects data and 5v/3v.
I'd be grateful for any help or pointers to finally get this to work.
