Connected alert beacon
A one-button device that sends its wearer’s position to a mobile app.
- Prototype
- IoT
- Embedded
- Mobile
Soil moisture monitoring station
A self-powered station that measures moisture at three depths and tells farmers when to irrigate.
- In production
- Product
- IoT
- Embedded
- Data
- Role
- Electronics design, firmware and dashboard
- Year
- 2024
Context
Fictional project. Cooperatives irrigate by guesswork for lack of reliable, affordable measurements.
Problem
Off-the-shelf probes cost too much and assume network coverage that fields do not have.
Solution
A solar-powered station transmitting over LoRaWAN to a gateway shared by the village.
Technical sheet
| Feature | Value |
|---|---|
| Microcontroller | ESP32-S3 |
| Sensors | 3 capacitive probes, temperature |
| Connectivity | LoRaWAN 868 MHz |
| Power | 2 W panel + LiFePO4 battery |
Architecture diagram
Hardware
| Component | Role | Quantity |
|---|---|---|
| ESP32-S3-WROOM-1 | Processing unit | 1 |
| SX1262 | LoRa radio | 1 |
| Sonde capacitive v2 | Moisture sensing | 3 |
Stack
- ESP32 (C/C++)
- LoRaWAN
- MQTT
- PostgreSQL
Results
- water used during the pilot
- −25 %
- months of measured battery life
- 14
Links
Related projects
Leak detection from vibration
Experiment: an accelerometer and a tiny on-device model to spot a leak on a pipe.
- Concept
- AI
- Embedded