ds18b_script
A python script for DS18b temperature sensor which writes to InfluxDB 2.0
Tested with InfluxDB 2 and Raspberry Pi 4 running Raspbian 64bit. InfluxDB 2 runs on the same host that hosts the script (localhost).
The script runs
Dependencies
Python3. Also:
pip install influxdb-client
Edit /boot/config.txt to enable GPIO. Add the following to the [all] section:
dtoverlay=w1-gpio
Find out manually which unique ID to use. Something like:
sudo modprobe w1-gpio
sudo modprobe w1-therm
ls /sys/bus/w1/devices/28-*/w1_slave
You can test it with:
cat /sys/bus/w1/devices/28-*/w1_slave
The output should look like:
2a 01 55 05 7f a5 81 66 8c : crc=8c YES
2a 01 55 05 7f a5 81 66 8c t=18625
Once you find it copy and paste the path into temp_sensor1 variable.
Put the InfluxDB 2 token into token variable.
Put the hostname into host variable.
Change the org variable if necessary.
Daemonize
The script will run continiously in foreground. You can use it with screen or tmux and detach. However cleaner way would be to install supervisord and use it with supervisor.
Install supervisor with:
sudo apt install supervisor
And add the config for our temperature sensor by creating a new file at /etc/supervisor/conf.d/temperature.conf. The contents of the file should be:
[program:supervisor_temperature]
command=/usr/bin/t1-logger.py
Change the command path to the path of your t1-logger.py script.
check with sudo supervisorctl status
supervisor_temperature RUNNING pid 4963, uptime 0:26:09