Feelloo connected GPS medallion for cats

A GPS tracker worn on a cat’s collar, combining GPS, Wi-Fi and LoRa in a small battery-powered device.

1Medallion: 27 mm, 7 g, waterproof, clips onto the collar. GPS, Wi-Fi and LoRa on a SAM R34/35 (Cortex-M0+).
2Base: charges the medallion, relays its data over Wi-Fi and talks to it over LoRa up to about 300 m. Its light shows when the cat is at home.
3Companion app: live position on a map, activity tracking and alerts.

Fig. 1Simplified 3D view, not to scale in detail. Drag to rotate, scroll to zoom.

Category: IoT & GNSS
Organization: Ubiscale
Period: 2019 – 2022
Technologies: SAM R34/35 (Cortex-M0+), Bare metal C, LoRa, Wi-Fi, GPS, OTA
Website: feelloo.com ↗

Context

Feelloo lets owners locate their cat. The device has to be small and light, run on a battery for as long as possible, and be updatable in the field.

My role

Developed the bare-metal C firmware for GPS, Wi-Fi and LoRa connectivity: state machine design, power management, over-the-air firmware updates and a custom bootloader.