Dust Sensor Node
A LoRa dust sensor keeping tabs on shop air quality so my lungs don't have to find out the hard way.
Status: Two Units Deployed & Testing
Sawdust, sanding, laser fumes — the shop generates a lot of things that probably shouldn't be breathed in more than necessary. This node is a wireless environmental monitor that watches airborne particulate matter, temperature, and humidity, then radios the readings out over LoRa to a receiver instead of needing WiFi coverage everywhere a sensor might end up.
Two units are currently built and deployed, actively testing air quality around the shop. In parallel, an upgraded revision is in the works — higher grade particulate sensors and a proper enclosure, replacing the current bare-board setup.
Hardware
| Controller | Heltec WiFi LoRa 32 V4.3 (ESP32-S3, SX1262 LoRa radio, OLED) |
| Air Quality Sensor | Sensirion SPS30 particulate matter sensor (I2C) |
| PM Readings | PM1.0, PM2.5, PM4.0, PM10, particle count |
| Environment Sensor | DHT11 temperature / humidity module |
| Receiver | DX-LR02-A (ASR6601) |
What's Next
- Finalize the DHT11 wiring and confirm temp/humidity readings on the OLED.
- Build the upgraded revision: higher grade PM sensor plus a real enclosure instead of a bare board.
- Define a proper LoRa packet structure with timestamp and node ID, so multiple units can report in.
- Nail down LoRa frequency and radio settings, and confirm the Heltec talks reliably to the DX-LR02-A receiver.
- Evaluate running the nodes on battery instead of tethered power.