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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 ===== | ||
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| - | {{ :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 | ||
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| - | ==== 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 the older variants of [[en:hw:02-neuron|Unipi Neuron]] controllers or the [[en:hw:06-1-wire-hub|UniPi 1-Wire hub]]. The newer variant of Unipi Neu | ||
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| - | ron PLCs and the Unipi Axon product line both use a 3-wire screw terminal which** does not support the RJ45 connector**. To connect the 1-Wire temperature sensor to Axon or Neuron controllers, you can use two methods | ||
| - | - cut off the sensor's RJ45 connector, put ferrules on the conductors and screw them into a screw terminal connector included in the controller's package following [[https://kb.unipi.technology/_media/en:automation:02-glossary:infografika_axon.png|this pin-out scheme]] | ||
| - | - use a [[https://www.unipi.technology/rj45-3-pin-1-wire-cable-reduction-p325|cable reduction]] | ||
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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|}} | ||
