Large drainback solar hot water project

ESharp · 10-27-13, 10:44 AM

One issue I’m working through at the moment is getting reliable readings from the temperature sensors. As soon as I plug in a fourth sensor, I stop getting readings from all of them. I’ve done a bit of googling and I apparently chose the least recommended configuration for longer wire runs with multiple One Wire sensors, the star, or hub. This is when each sensor is on it’s own wire and they all connect back to the one spot next to the arduino. For larger networks of sensors a daisy-chain configuration is recommended.

Guidelines for Reliable Long Line 1-Wire Networks - Tutorial - Maxim

10-27-13, 10:44 AM	#23
ESharp Lurking Renovator Join Date: Apr 2012 Location: NS, Canada Posts: 21 Thanks: 1 Thanked 9 Times in 6 Posts	One issue I’m working through at the moment is getting reliable readings from the temperature sensors. As soon as I plug in a fourth sensor, I stop getting readings from all of them. I’ve done a bit of googling and I apparently chose the least recommended configuration for longer wire runs with multiple One Wire sensors, the star, or hub. This is when each sensor is on it’s own wire and they all connect back to the one spot next to the arduino. For larger networks of sensors a daisy-chain configuration is recommended. Guidelines for Reliable Long Line 1-Wire Networks - Tutorial - Maxim