GPS Tracking via Handy-Talky Networks

Oil palm plantations are large, remote, and almost always outside reliable cellular coverage. That makes conventional GPS tracking — the kind that reports location over GPRS or LTE — unreliable exactly where you need it most.

Why handy-talky radio

Handy-talky (HT) radios are already standard equipment on most plantations for voice communication between field staff. That existing infrastructure has three properties worth reusing:

• Coverage that already matches the operating area — if voice calls work, the radio link works.
• Low per-unit cost compared to deploying a parallel satellite or cellular tracking network.
• No recurring data plan — the constraint becomes airtime/channel usage, not a metered SIM.

The basic architecture

1. A GPS receiver module on the tracked unit (vehicle or personnel device) captures a location fix at a set interval.
2. The coordinates are encoded into a compact payload — every byte matters on a narrowband radio channel.
3. The payload is transmitted over the existing HT radio channel to a base station.
4. The base station decodes incoming payloads and feeds them into a monitoring dashboard for real-time visualization.

[GPS Module] -> [Encoder] -> [HT Radio TX] -----> [HT Radio RX] -> [Decoder] -> [Monitoring Dashboard]

Trade-offs to expect

• Update frequency vs. channel congestion. Voice and telemetry may need to share a channel or use adjacent frequencies — this has to be planned with whoever manages the radio license, not bolted on afterward.
• Payload size discipline. Narrowband radio channels don't forgive verbose payloads the way an MQTT-over-LTE link does.
• Positioning accuracy vs. power draw. More frequent GPS fixes mean better tracking resolution but faster battery drain on field units.

This approach won't replace cellular tracking where cellular is actually available — but where it isn't, reusing radio infrastructure that's already trusted and already deployed is often more practical than adding a new network just for telemetry.