Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
en:hw:05-1-wire [2018/09/20 13:37]
tomhora ↷ Page name changed from en:hw:05-1-wire-thermometers to en:hw:05-1-wire
— (current)
Line 1: Line 1:
-====== 1-Wire ====== 
-1-Wire is a device communications bus system that provides low-speed data, signaling, and power over a single conductor. 
  
-UniPi tries to maximize the reliability of the whole network by serializing the bus as much as possible. This is achieved by using 4 wires (GND, VCC, Data-IN, Data-OUT). This four-wire design is used in our 1Wire temperature sensors and 8port hubs. 
- 
-===== 1-Wire thermometers ===== 
- 
-{{ :​en:​hw:​03-1wire:​xds18b20.jpg?​direct&​100|}} 
- 
-The DS18B20 is widely used [[en:​automation:​02-glossary:​1wire-hidden|1-Wire]] sensor in TO-92 package. ​ 
- 
- 
-  * Power supply range is 3.0V to 5.5V 
-  * Measures temperatures from -55°C to +125°C (-67°F to +257°F) 
-  * ±0.5°C accuracy from -10°C to +85°C 
-  * Converts 12-bit temperature to digital word in 750 ms (max.) 
-  * Can be powered from data line 
- 
-==== UniPi 1-wire temperature sensor ==== 
-The [[https://​www.unipi.technology/​1-wire-temperature-sensor-p63?​categoryId=3|UniPi 1-Wire temperature sensor]] is equipped with RJ45 connector, so it is easy to connect to [[en:​hw:​02-neuron|UniPi Neuron]] controllers and [[en:​hw:​06-1-wire-hub|UniPi 1-Wire hub]]. In order to connect the sensor to UniPi Axon, you have to cut off the connector, put on the ferrules (see [[en:​automation:​01-how-to:​wiring-hidden|wiring guidelines]]) and screw it to the Axon's 1-Wire connector according to [[en:​automation:​02-glossary:​1wire-hidden#​wire_on_unipi_axon|this pinout]] 
- 
-The sensor introduces a 4 wire connection for better reliability of larger network, which can be converted to 3 wire version for simplification. 
- 
-{{ :​en:​hw:​03-1wire:​1-wire-temperature-meter.png?​direct |}} 
- 
-FIXME How to connect temperature sensor with RJ45/or the HUB to the controller (Neuron/​Axon) where there is crew connector insted of RJ45? 
- 
-FIXME 3wire connection 
- 
-FIXME 4wire connection 
-===== Firvena attachable sensor with hose clamp =====  
- 
-FIXME 
- 
-===== Firvena sensor for air conditioning pipes ===== 
- 
-FIXME