While planning on attending a live music venue for the first time in ~2 years, I decided the only way I’d feel safe doing so was being able to calculate the CO2 ppm live.
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Low flow shower head
We replaced our 90s shower head with a low flow 5 L/min shower head
Sending data over LTE
Sending air quality sensor data over a mobile LTE network with a Blues Notecard.
Power & battery management
Until now I’ve been powering the water quality sensors via a USB cable either to an external power supply, or directly to my laptop for debugging. For the sensors to work in the real world they’ll need to have at least a day’s battery life if not a week to be useable. I can imagine …
Upgrading The Things Uno RN2903 firmware
It turns out that it wasn’t only the range that might have been causing my connection problems to The Things Network – Andrew Sargent from OpenSensing spotted that in my logs the LoRaWAN RN2903 chip was reporting a firmware version 0.9.5 whereas the version needed to connect is 1.0.3 I’m on macOS, so ideally wanted …