Welcome back, in this post I will cover connecting, testing and integrating the [DS 18B20](https://www.adafruit.com/product/381) sensor with the raspberry Pi3 and Ros2. # Connecting and Testing Started by following the Ground Temperature section of this [guide](https://projects.raspberrypi.org/en/projects/build-your-own-weather-station/2). It didn't fully work and I found myself questioning whether or not I had correctly crimped wire connectors onto the end of the sensor. After some time I found you have to actually mount /boot before editing /boot/config.txt. The boot config editing should go as follows: <code> sudo mount /dev/mmcblk0p1 /boot </code> <code> sudo nano /boot/config.txt </code> Add <code> dtoverlay=w1-gpio,gpiopin=4 </code> to the end of the file. The ground sensor is connected through the bread board as shown.  # Adding Ros2 Added another ros node to the project called [DS18B20_sensor.py](https://gitlab.com/Robotjini/mimir/-/blob/master/mimir/DS18B20_sensor.py). The node publishes the temperature in Celsius published on the ros topic /ds18B20_temperature. Check out the [third blog](https://steemit.com/diy/@robotjini/5tdps3-3-custom-weather-station-temperature-pressure-humidity-sensor-install) for information on downloading and using the code. Created a [launch file](https://gitlab.com/Robotjini/mimir/-/blob/master/launch/all_sensors_launch.py) in /launch to launch all 3 active sensors and will be expanded for the remaining wind and rain sensor. To use after building and sourcing the ROS project run <code>ros2 launch mimir all_sensors_launch.py</code>. Please like and subscribe. 1. [Building a Custom Weather Station in ROS2 Parts and Plans (DIY BLOG)](https://beta.steemit.com/ros2/@robotjini/1-building-a-custom-weather-station-in-ros2-parts-and-plans-diy-blog) 2. [Custom Weather Station: Installing Ros2 (DIY BLOG)](https://beta.steemit.com/diy/@robotjini/2-custom-weather-station-installing-ros2-diy-blog) 3. [Custom Weather Station: Temperature, Pressure, Humidity Sensor Install](https://steemit.com/diy/@robotjini/5tdps3-3-custom-weather-station-temperature-pressure-humidity-sensor-install) 4. [Custom Weather Station: UV Sensor install](https://steemit.com/diy/@robotjini/4-custom-weather-station-uv-sensor-install)
| author | robotjini |
|---|---|
| permlink | 5-custom-weather-station-ground-temperature-sensor |
| category | diy |
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| created | 2020-03-17 14:13:42 |
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| author | build-it.curator |
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| permlink | q7e5ok |
| category | diy |
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