View source for DS18B20 1-WIRE TEMPERATURE SENSOR

==Introduction to the product ==
The DS18B20 is a digital temperature sensor created by Dallas Semiconductor (now part of Maxim Integrated). It uses a special 1-Wire® communication protocol. This protocol allows data transfer using just a single data line, which significantly reduces the number of required connections! 

You can find this sensor in two main types: 
*  A TO-92 package that looks like a small transistor 
*  A waterproof probe that’s perfect for measuring temperatures in wet environments, underground, or places that are hard to reach 
[[File:DS18B20 SENSOR.webp|thumb|right|300px]]
{| class="wikitable"
! style="background-color:#800020; white-space:nowrap; color:white;" | Parameters
! style="background-color:#800020; white-space:nowrap; color:white;" | Value
|-
|Power Supply 
|3V to 5.5V 
|-
|Current Consumption 
|1mA 
|-
|Temperature Range 
|(-55 to 125°C)
|-
|Accuracy 
|±0.5°C 
|-
|Resolution 
|9 to 12 bit (selectable) 
|-
|Conversion Time 
|< 750ms 
|-
|}
'''Wiring'''
<div style="color: red; font-weight: bold;"> Red - Power</div>
<div style="color: black; font-weight: bold;"> Black - GND  </div>
<div style="color: yellow; font-weight: bold;">Yellow / White - Data   </div>

==Configuration==
Before configuring, ensure that the DS18B20 sensor(s) are connected to the '''Transight''' telematics device as per the sensor pinout.  
Improper wiring may lead to failed communication or sensor detection issues.

<div style="color: red; font-weight: bold;">⚠️ Note: Up to 3 DS18B20 sensors can be connected to any Transight device that supports 1-Wire functionality.</div>

== Step 1: Enable 1-Wire Sensor Interface ==

This command activates the 1-Wire port for sensor communication.
 
'''Command:'''
<pre>
SET CUENOW:ON
</pre>
 
'''Expected Response:'''
<pre>
IMEI: 862942074896044
Command: SET CUENOW:ON
Response:  
Error : 0
</pre>
 
'''Verification Command:'''
<pre>
GET CUENOW
</pre>
 
'''Expected Verification Response:'''
<pre>
IMEI: 862942074896044
Command: GET CUENOW
Response: ENOW:ON
Error : 0
</pre>

== Step 2: Configure the 1-Wire Sensor Model ==

This command sets the sensor model to DS18B20.
 
'''Command:'''
<pre>

SET CUOWCFG:DS18B20
</pre>
 
'''Expected Response:'''
<pre>

IMEI: 862942074896044

Command: SET CUOWCFG:DS18B20
 
Response:  

Error : 0
</pre>
 
'''Verification Command:'''
<pre>

GET CUOWCFG
</pre>
 
'''Expected Verification Response:'''
<pre>

IMEI: 862942074896044

Command: GET CUOWCFG
 
Response: OWCFG: DS18B20

Error : 0
</pre>
 
== Step 3: Specify the Number of Connected Sensors ==

Define the number of connected DS18B20 sensors. Maximum supported: 3.
 
'''Command:'''
<pre>

SET CUOWNOS:1
</pre>
 
*(Update the number `1` to `2` or `3` if more sensors are connected.)*
 
'''Expected Response:'''
<pre>

IMEI: 862942074896044

Command: SET CUOWNOS:1
 
Response:  

Error : 0
</pre>
 
'''Verification Command:'''
<pre>

GET CUOWNOS
</pre>
 
'''Expected Verification Response:'''
<pre>

IMEI: 862942074896044

Command: GET CUOWNOS
 
Response: TEMPERATURE SENSOR NOS: 1

Error : 0
</pre>
 
== ⚠️ Mandatory Finalization Step ==

Apply and save the sensor settings.
 
'''Command:'''
<pre>
SET CUMR:2
</pre>

== Post-Configuration Validation Checklist ==

Once configuration is completed, verify the data stream:
 
* 🔄 Monitor incoming packets from the device.

* 🌡️ Ensure temperature values are included in the payload.

* 📈 Confirm periodic updates from each connected sensor.

* ✅ Check the accuracy and consistency of readings.