With the (1-Wire) interface of Teltonika FMU125 GPS vehicle tracker, you can monitoring the vehicle temperature or manage the "Driver identification" through RFID/iButtons and avoid the unauthorized driving of your vehicle in field service management. FMU125 of Teltonika is compatible with Bluetooth 4.0 + LE and using the Bluetooth connectivity you can paring external peripherical: (humidity and temperature sensors, barcode reader, Low Energy sensors). If you need vehicle telemetry data, Teltonika FMU125 GPS vehicle tracker can read "Can Bus" data that extract from the (ECU - engine control unit) of vehicle, the Can Bus events are send to an online server. For improve the "Driving control" in your vehicle or in their automatic vehicle dispatch, FMU125 of Teltonika has the follows "predefined scenarios" that you can active in the FMU125 configuration: (green driving, over speeding detection, jamming detection, GNSS fuel control counter, digital output control via call, excessive idling detection, immobilizer, iButton read notification, unplug detection, towing detection, crash detection, routes detection). The most recommended solution for real-time hours of service control of the vehicle that have installed an Teltonika FMU125 GPS tracker, is register the FMU125 tracker in a Tracking Management Platform always online, FMU125 also accept and send text messages from a mobile phone via SMS, FMU125 can be use an REST API to connect existing applications.