HTresearch

4 ms·

1. 1.▲
   by HTresearch 4y ago

   No link yet. Still working on a web site for it.
2. 2.▲
   by HTresearch 4y ago

   OLED is the cheapest display with enough resolution. No Bluetooth. A previous version had it, but the development effort was much higher, given it then needed an App also. I wanted something simple for say a school teacher to report value
3. 3.▲
   by HTresearch 4y ago

   The current readings are on the display. The QR code encodes 40 previous values of CO2 plus 40 of the VOC index. I have a debug mode that can display the whole URL, but it is so long that it would be impractical to type it in instead of th
4. 4.▲
   by HTresearch 4y ago

   It sounds like you are looking for something like the air monitor I have been developing over the last two years. It is about the size of a deck of cards and fits in a shirt pocket. The Lithium Polymer battery powers it for 12-16 hours an