I am building a Testbench composed of several industrial IoT Wireless CO2 Temperature Humidity Sensors. They were placed in a room and close to each other and configured to read on one minute interval. While there was a minor different in the readings from the temperature and humidity sensors, the Co2 sensor’ readings exposed a relatively considerable different.
Any ideas about how to calibrate the sensors so their readings can be relatively close.
The attached image shows the Co2 readings from a Grafana dashboard.
I used nine IoT wireless sensors and their Co2 readings are red framed on the left.
Yes, I am using Node-red to read from the sensors using the Micro Mqtt Gateway
node red supports force calibration
You can send the configuration command just like any other command.
- Go to sensor config in node res
- Select auto cfg
- Set the calibration value to 400
- Put the gateway node in cfg mode
- Put the sensor in cfg mode using cfg and reset button
- While calibrating make sure sensor in a clean open environment
The calibration process will take 3 min.
Thank you very much for the response.
Can you elaborate more regarding the connection of the Wi-Fi Micro Gateway for MQTT to the node-red using the Wireless gateway node. I tried but did not work. I connected the gateway to the Raspberry using USB cable and having the node-red installed and running. Moreover, the gateway is run and send data to the node-red using the MQTT.
You will need a USB modem
Thanks a lot for this nice video.