Those parallel interface E-ink displays have way better specs and costs cheaper. However they require additional hardware to create the driving voltages, which require a custom PCB and SMD soldering. This project (at least for the development hardware) does not require any special tools or custom PCB. Those display are really tempting though...
High CO2 levels can cause drowsiness, tiredness, and decreases productivity.
You don't just study or read in your house, do you? Big 1800mAh battery keeps it powered for multiple days.
Keep comfortable while you do your work. Built-in fan keeps air flowing for the most accurate readings, all in a pocketable package.
3.7" ePaper display capable of displaying not just current sensor readings, but also trend graphs, podomoro timers, todo lists and reminders, calendar schedule, vocabulary lists, you name it.
Currently a prototype hardware unit is used for development.
More information about the hardware will be released in the future.
Here's a brief list of the bill of materials:
- Firebeetle 2 ESP32 development board
- Waveshare 3.7" ePaper display HAT
- Senseair S8 LP NDIR CO2 sensor
- SHT31 temperature and humidity sensor
- 1800mAh lithium polymer battery
- microSD breakout board
- 25mm 5V 0.35W DC fan
- 2 sliding switches, 1 SMD soft silent switch, 7*2 female pin header
- Wire wrapping wire, 1mm cardstock, transparent projection film (as screen protector)