TerraPulse is an open-source, high-precision seismic activity monitoring system designed with Wemos D1 Mini (ESP8266). It measures real-time gravitational forces (G-force), detects vibrations, and provides both local visual/auditory alerts and remote mobile monitoring.
- Dual-Mode Operation: Works in IoT Mode (WiFi connected) for remote monitoring and Standalone Mode (Offline) for independent safety.
- Real-Time Data Visualization: Live G-force monitoring via OLED display and a custom-built Mobile App.
- Advanced Control: 4-button physical interface on the device to adjust sensitivity, reset peak values, and manage power (Screen Toggle).
- Failsafe Alarm System: Active Low buzzer integration for instant auditory warnings during "DANGER" levels.
The system is built on a robust mechatronic foundation, ensuring signal stability with decoupling capacitors.
- Microcontroller: Wemos D1 Mini (ESP8266)
- IMU Sensor: MPU6050 (Accelerometer & Gyroscope)
- Vibration Sensor: 801S High Sensitivity Module
- Display: 0.96" SSD1306 OLED (I2C)
- Alert: Active Low Buzzer Module
- Power: 18650 Li-ion Battery + TP4056 Charger
- Filtering: 100nF/470uF Bulk & Decoupling capacitors.
Developed using MIT App Inventor, the mobile application communicates with the device via an HTTP Web Server.
| Normal Mode | Alarm Mode |
|---|---|
 |
 |
- Live Sismograf: Visualizes the pulse of the earth.
- Dynamic Threshold: Adjust device sensitivity remotely using a slider.
- Status Logs: Real-time "NORMAL" vs "DANGER" status updates.
├── src/
│ ├── Terrapulse_source_code.ino # Main firmware
│ └── i2c_device_finding_code.ino # Debug tool for I2C addresses
├── mobile/
│ ├── Terra_Pulse_Mobile_App.aia # App Inventor source file
│ └── Terra_Pulse.apk # Ready-to-install Android app
├── hardware/
│ ├── Terra_Pulse_Schematic.fzz # Fritzing schematic file
│ └── Terrapulse_schematics.png # High-res circuit diagram
└── assets/ # Screenshots & UI icons
├── Terrapulse_online_mode.jpeg
├── Terrapulse_offline_mode.jpeg
├── Terrapulse_normal_mode_mobile.jpeg
├── Terrapulse_alarm_mode_mobile.jpeg
└── Terrapulse_schematics.png
- Hardware: Assemble the circuit as shown in
hardware/Terrapulse_schematics.png. - Firmware: * Open
src/Terrapulse_source_code.inoin Arduino IDE.- Enter your WiFi credentials.
- Upload to Wemos D1 Mini.
- Mobile App: Install
mobile/Terra_Pulse.apkon your Android device. Enter the IP address displayed on the OLED (see below) into the app.
İsmet Akalın 3rd-year Mechatronics Engineering Student at Izmir Katip Celebi University Embedded Systems & Robotics Enthusiast
This project is licensed under the MIT License.