Smart Telemetry Collar

The problem

Commercial pet trackers are a closed subscription box. The same problem — where is the animal, is it moving normally — is worth far more to a smallholder farmer tracking livestock, and nobody builds for that price point.

What I did

1. 01

   ESP32 as the orchestrator: it wakes the subsystems, packages readings and publishes them rather than any one sensor owning the loop

2. 02

   SIM808 for GPS fixes and GPRS transmission, validated against a live SIM rather than a bench simulator

3. 03

   MPU6050 accelerometer and gyroscope for activity and step counting, which doubles as the inactivity signal

4. 04

   Inactivity-triggered sleep modes, since battery life is the constraint that decides whether a collar is wearable at all

5. 05

   Kept the sensor layer modular, so heart rate or bark detection can be added without touching the core architecture

Outcome

• Working proof of concept validated end to end — GPS acquisition, cellular transmission, motion capture and cloud ingest

• Sleep modes demonstrated to extend battery life, the gate on any real deployment

• Documented to a standard another engineer can pick up and build against