Flying Blind with the Heltec Cube

Now that I’ve got the Heltec Cube sending messages to the Things Network, the next thing to do was to get the device reading from my particle sensor. This was tricky because the sensor uses the one serial port on the Cube. That’s the same port as is used for programming and sending diagnostics. So I had to fly my code “blind”. Fortunately the Cube has a single neopixel on the board which I can control from software. And by using that, plus testing the code on another device first, I managed to get it working.

If you watch the two second video above you can see the pixel flash green when the message goes through. I’m very proud of that….