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en:hw:05-1-wire [2019/10/16 06:49]
jan_kozak [Firvena attachable sensor with hose clamp]
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-======%hide 1-Wire Devices ===== 
-====== 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. 
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-===== 1-Wire thermometers ===== 
- 
-{{ :​en:​hw:​03-1wire:​xds18b20.jpg?​direct&​100|}} 
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-The DS18B20 is widely used [[en:​automation:​02-glossary:​1wire-hidden|1-Wire]] sensor in TO-92 package. ​ 
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-  * 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 l 
- 
-==== 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]] 
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-The sensor introduces a 4 wire connection for better reliability of larger network, which can be converted to 3 wire version for simplification. 
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-{{ :​en:​hw:​03-1wire:​1-wire-temperature-meter.png?​direct |}} 
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-==== Connecting a single 1-Wire sensor to the Unipi controller ==== 
-{{:​en:​hw:​1wire_temp_eng.png?​600|}} 
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-==== Connecting a pair of 1-Wire sensors to the Unipi controller via RJ45 splitter ==== 
-{{:​en:​hw:​splittereng.png?​600|}} 
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-==== Connecting multiple 1-Wire sensors through a 1-Wire hub==== 
-{{:​en:​hw:​hub_simple_eng.png?​600|}} 
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-==== Creating a multi-hub extensive network of 1-Wire sensors==== 
-{{:​en:​hw:​hubeng.png?​600 
-|}} 
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-=====%hide Firvena attachable sensor with hose clamp ===== 
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-%h 
-ide FIXME 
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-=====%hide Firvena sensor for air conditioning pipes ===== 
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-FIXME