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en:sw:01-mervis:attaching-1-wire-devices-hidden [2021/05/03 07:43] – [Attaching 1-Wire temperature sensor] avsetulaen:sw:01-mervis:attaching-1-wire-devices-hidden [2024/09/24 11:22] (current) – avsetula
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     * defined task running a program from **Executable project**     * defined task running a program from **Executable project**
     * successfully executed **Build**     * successfully executed **Build**
-  * [[https://www.unipi.technology/power-supplies-c15|24V power supply]]+  * [[https://www.unipi.technology/power-supplies-c15|24 V⎓ power supply]]
   * [[https://www.unipi.technology/1-wire-temperature-sensor-p63?categoryId=3|1-Wire temperature sensor]]   * [[https://www.unipi.technology/1-wire-temperature-sensor-p63?categoryId=3|1-Wire temperature sensor]]
  
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 ===== Attaching 1-Wire temperature sensor ===== ===== Attaching 1-Wire temperature sensor =====
  
-You can find all the informations about how to connect the DS18B20 based temeperature sensor [[en:hw:05-sensors:1-wire|here]].+You can find all the informations about how to connect the DS18B20 based temeperature sensor [[en:automation:02-glossary:1wire-hidden|here]].
  
 ===== Configuring 1-Wire bus in Mervis ===== ===== Configuring 1-Wire bus in Mervis =====
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 ===== Detecting 1-Wire sensors ===== ===== Detecting 1-Wire sensors =====
  
-1-Wire bus is a serial bus, which can interconnect many sensors. Each sensor has its unique HW address, through which the master of the bus addresses the slave and reads data from. Therefor we need to tell UniPi controller to look for a certain devices on the bus. Luckily, we can detect all the sensors on the bus and then select the ones we are interested in.+1-Wire bus is a serial bus, which can interconnect many sensors. Each sensor has its unique HW address, through which the master of the bus addresses the slave and reads data from. Therefor we need to tell Unipi controller to look for a certain devices on the bus. Luckily, we can detect all the sensors on the bus and then select the ones we are interested in.
  
 To detect the sensors, right click on the **1wire** channel name under the PLC in the **Solution** tab of the **Left panel**. In the context menu, click on the **Detect One Wire Sensors**. To detect the sensors, right click on the **1wire** channel name under the PLC in the **Solution** tab of the **Left panel**. In the context menu, click on the **Detect One Wire Sensors**.
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 {{ :en:sw:01-mervis:attaching-1-wire-devices-09-selecting-sensors.png?direct |}} {{ :en:sw:01-mervis:attaching-1-wire-devices-09-selecting-sensors.png?direct |}}
 +
 +<WRAP center round important 90%>
 +If you have connected a Unipi 1W-TH-IB(2) sensor and after autodetection **1W-UniversalAi** is not automatically selected in the "Prototype name" column, you must manually select it, otherwise the sensor will not work correctly.
 +</WRAP>
  
 The importing of the sensor will proceed and finish with restoring the PLC's mode. The importing of the sensor will proceed and finish with restoring the PLC's mode.
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 ===== Debugging solution ===== ===== Debugging solution =====
-The Mervis IDE has a feature called **Debugging**, which allows to connect to the running UniPi controller, read its state and even alter the variables on-the-fly. To start the debugging, click on the **Start Debugging** button on the **Ribbon**.+The Mervis IDE has a feature called **Debugging**, which allows to connect to the running Unipi controller, read its state and even alter the variables on-the-fly. To start the debugging, click on the **Start Debugging** button on the **Ribbon**.
  
 {{ :en:sw:01-mervis:attaching-1-wire-devices-13-debug.png?direct |}} {{ :en:sw:01-mervis:attaching-1-wire-devices-13-debug.png?direct |}}
  
-To view the variables and their state in debug mode, click on the **Variable Browser** tab on the **Main window**. You will be presented with all the variables available in the controller. You can use searching by **Name**. Our temperature sensor has been autonamed "1W-Thermometer" (check the device in the **Left panel** under the **1wire** channel), so enter this name into the **Name** searchbox. The variable containing the actual temperature is called **1W-Thermometer_Temperature** and its current value in PLC is **29.875**°C.+To view the variables and their state in debug mode, click on the **Variable Browser** tab on the **Main window**. You will be presented with all the variables available in the controller. You can use searching by **Name**. Our temperature sensor has been autonamed "1W-Thermometer" (check the device in the **Left panel** under the **1wire** channel), so enter this name into the **Name** searchbox. The variable containing the actual temperature is called **1W-Thermometer_Temperature** and its current value in PLC is **29.875** °C.
  
 {{ :en:sw:01-mervis:attaching-1-wire-devices-14-variable-browser.png?direct |}} {{ :en:sw:01-mervis:attaching-1-wire-devices-14-variable-browser.png?direct |}}
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 We have connected the temperature sensor to our controller and verified, that we can read current temperature. Now we can use it in very simple temperature regulator. We have connected the temperature sensor to our controller and verified, that we can read current temperature. Now we can use it in very simple temperature regulator.
  
-We will be monitoring temperature and if the temperature will be under 30°C, we will turn the ''RO2.1'' ''ON'' and when the temperature will be greater or equal to 30°C, we will turn the ''RO2.1'' ''OFF''. The ''RO2.1'' will represent a heating element.+We will be monitoring temperature and if the temperature will be under 30 °C, we will turn the ''RO2.1'' ''ON'' and when the temperature will be greater or equal to 30 °C, we will turn the ''RO2.1'' ''OFF''. The ''RO2.1'' will represent a heating element.
  
-We could "hardwire" the temperature "30°C" into the program, but we wouldn't be able to change it afterwards other than reprogramming the PLC. Most likely, we would like to set the threshold (or desired) temperature by some knob, buttons or even HMI device. So it is better to define it as another variable and set the threshold by changing the variable's value. Later we can wire this variable to some other HW input.+We could "hardwire" the temperature "30 °C" into the program, but we wouldn't be able to change it afterwards other than reprogramming the PLC. Most likely, we would like to set the threshold (or desired) temperature by some knob, buttons or even HMI device. So it is better to define it as another variable and set the threshold by changing the variable's value. Later we can wire this variable to some other HW input.
  
 Our program will therefor need two inputs: ''measured_temperature'' and ''threshold_temperature''. In programming, each variable has to have some type - a definition, of what it can store. It can be integer, real number, boolean, character, string of characters or even more complicated type. Temperature by its nature is real number and so will be our variables ''measure_temperature'' and ''threshold_temperature''. Our program will therefor need two inputs: ''measured_temperature'' and ''threshold_temperature''. In programming, each variable has to have some type - a definition, of what it can store. It can be integer, real number, boolean, character, string of characters or even more complicated type. Temperature by its nature is real number and so will be our variables ''measure_temperature'' and ''threshold_temperature''.
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 If you have the correct connections, you can **Build** the solution and if the **Build** succeeds, **Deploy** the solution to the controller. If you have the correct connections, you can **Build** the solution and if the **Build** succeeds, **Deploy** the solution to the controller.
  
-If your **Deploy** went well, you can **Start Debugging**. In the debugging mode, you can see actual values of each input and output of each block. You can see temperature in our office is 29.625°C, which is less then threshold of 30°C and therefor the heating is ''ON'' (''TRUE'').+If your **Deploy** went well, you can **Start Debugging**. In the debugging mode, you can see actual values of each input and output of each block. You can see temperature in our office is 29.625 °C, which is less then threshold of 30 °C and therefor the heating is ''ON'' (''TRUE'').
  
 {{ :en:sw:01-mervis:attaching-1-wire-devices-23-debugging-low.png?direct |}} {{ :en:sw:01-mervis:attaching-1-wire-devices-23-debugging-low.png?direct |}}
  
-I warmed up the sensor a little bit and now it shows 30.875°C which is more than 30°C and therefor the heating is ''OFF'' (''FALSE'')+I warmed up the sensor a little bit and now it shows 30.875 °C which is more than 30 °C and therefor the heating is ''OFF'' (''FALSE'')
  
 {{ :en:sw:01-mervis:attaching-1-wire-devices-23-debugging-high.png?direct |}} {{ :en:sw:01-mervis:attaching-1-wire-devices-23-debugging-high.png?direct |}}
  
-Also the relay on your UniPi controller should switch ''ON'' and ''OFF''. If yes, congratulations! You just created your very first temperature regulator.+Also the relay on your Unipi controller should switch ''ON'' and ''OFF''. If yes, congratulations! You just created your very first temperature regulator.
  
 ===== Download ===== ===== Download =====
  
 You can download the whole project here: {{ :en:sw:01-mervis:attaching-1-wire-devices.zip |}} You can download the whole project here: {{ :en:sw:01-mervis:attaching-1-wire-devices.zip |}}
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