Evaluating location tracking technologies for asset management on battery-powered edge devices. GPS provides excellent outdoor accuracy (2-5m) but consumes significant power - our tests show 500-800mA draw during active tracking. Device battery life drops from 6 months to 3-4 weeks with continuous GPS.
Bluetooth Low Energy offers much better power efficiency (15-30mA) and works indoors where GPS fails. However, BLE range is limited (30-100m depending on environment) and requires beacon infrastructure. Accuracy is 3-10m depending on beacon density.
Considering hybrid approaches but concerned about implementation complexity. What’s worked well in production environments? How do you balance accuracy requirements against battery life constraints?
Automatic switching works well. Use GPS signal strength as trigger - if GPS signal weak or unavailable for 30 seconds, switch to BLE scanning. When GPS signal returns strong (>4 satellites), switch back. We use geofencing too - inside defined warehouse zones, prefer BLE even if GPS available. This saves power while maintaining accuracy where it matters.
Don’t overlook edge data filtering for GPS. You don’t need continuous tracking for most assets. Implement intelligent tracking - only get GPS fix when asset moves (use accelerometer to detect movement). Stationary assets tracked via last known location. This reduced our GPS active time by 85%, extending battery life to 5-6 months while maintaining tracking accuracy.
We use GPS for outdoor asset tracking exclusively. Yes, battery life is shorter, but accuracy is non-negotiable for our use case (construction equipment tracking). We mitigated battery issues by using larger batteries (10,000mAh) and solar charging panels. GPS fix every 5 minutes gives us good balance - battery lasts 8-10 months with solar assist.
BLE is perfect for indoor warehouses. We deployed 200 BLE beacons across our 400K sqft facility. Asset tracking is accurate to within 5 meters, and device batteries last 8-12 months. The beacon infrastructure cost was significant upfront ($15K) but operational costs are minimal. GPS would be useless inside our metal building anyway.