Now it’s time to have a look at sending the data the Octopus microcontroller has measured, through its own sensors or attached ones, over the net.
For this tutorial, we’ll use the Octopus microcontroller’s on-board Bosch BME680 sensor.
Note for Mac and Pi users: Unfortunately, there’s an incompatibility with the Mac OS compiler and the Bosch BME680 BEC driver. Things fail in the compilation stage. A workaround is to read a single BME680 value at a time, or use a different BME680 driver, without BSEC. Sometimes it works, just try or use a windows system
The BME680 BSEC is a great sensor, which can measure:
- Air pressure
- Relative humidity ( rH )
- VOC – Volatile Organic Compounds.
- IAQ – Air Quality Index (AQI). AQI values between 0-100 means the air is relatively ok. AQI values between 100 and 200 means it’s a good idea to ventilate regularly. Values above 200 indicate one needs to ventilate urgently.
The AQI value is calculated based on several factors. Thankfully we don’t need to worry about performing the calculations oursleves. The BME680 BSEC library does the complex calculations, and simply delivers us an AQI number. Simply select things relevan in the BSEC Block (the red arrow) and get the AQI value.
Thingsspeak Block with Bosch BME680 SEC in ArduBlocks
Sending measured data with Thingsspeak
Data can be sent from the Octopus, using the free Thingsspeak open source project and service. One can use the Thingsspeak website for free, for personal or educational purposes. Alternatively, one could also install the Thingsspeak software on a Raspberry PI, and use it as a Thingsspeak data receiving server. Using a Raspberry PI with Thingsspeak provides a low cost and low power solution.„Send data from the Octopus using Thingsspeak“ weiterlesen