AetherX is a precision environmental sensor which can gather a number of statistics in real time. This device was designed with ease of use and portability in mind. This project is in a functional state and is considered "complete" for the time being. All features of this project, minus the microphone, are functional and calibrated. In the future, I plan to revisit this project to make improvements.
All code for this project is within Core/src. Schematic, PCB and assembly files are contained within AetherX_KiCad.
Sensors:
- LM61 - Temperature
- DHT20 - Relative humidity and temperature
- OPT101 - Light intensity at 650nm wavelength
- MAX9814 - Microphone with signal output
Power
This device is powered by 2x AA batteries. I tested the battery life of this device and found it can last ~1 month before a battery change is needed. Further improvements could be made to the code for additional power savings.
- 2/25/25: 5mA @ 3V (15mW)
- 7/30/25 3.8mA @ 3V (11.4mW)
Software
- Re-do reading functions with ADC rank (only do readings when displayed)
- Screens: ADC voltage stats, humidity, time/date, clicker, settings?
- Restructure data in structs?
- Signal processing for MAX9814 (frequency data via FFT, sound level in dB)
Future Work
- Wireless daughter boards (STM32WB55, 3D print sphere case?)
- Data logging (>24hrs)