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4G telematics unit

For fleet and device management

TMU Pi3 telematics unit from Autopi (Denmark) is built on top of the Raspberry Pi 3 model A+ SBC (single-board computer). It can be connected to in-vehicle CAN networks via the OBD2 port.

The TMU Pi3 is upgradeable to the Raspberry Pi4 thus targeting future application (Source: Autopi)

The device is based on the 1,4-GHz Broadcom BCM2837B0 SOC (system on chip) with Cortex-A53 64-bit quad-core processor. A 512-MiB SDRAM and a 32-GiB micro SD card with installed Raspbian Jessie operating system and Autopi Core software are included. Supported CAN-based higher-layer protocols include ISO 15765-4 (diagnostic over CAN), J1939, and others. Wifi, Bluetooth, and 4G/LTE cellular network are offered for wireless connectivity. The TMU Pi3 is upgradeable to the Raspberry Pi4, if additional computing power and Ethernet support are required.

The connected vehicles can be tracked using browser-based Autopi Management Cloud software (Source: Autopi)

The unit features a GPS (global positioning system) receiver, a HDMI (video output) interface, an audio jack, built-in speakers, a micro USB port, and 18 programmable GPIO (general purpose input/output) pins. A 3-Axis accelerometer is implemented. On larger orders, it is possible to expand the TMU with a 3-axis gyroscope. Two LEDs indicate power and status of the device. Sizing 137 mm x 36mm x 66mm, it works with power supply of up to 35VDC, which is suitable for use in trucks. A built-in power management system prevents the vehicle’s battery from being drained when the TMU is left plugged in for extended periods of time. The operating temperature can range from -20 °C to +70 °C.

Together with the fleet and device management software Autopi Management Cloud the connected vehicles can be tracked and the data can be visualized and diagnosed on a PC or a mobile device. The dashboard is based on customizable widgets. The vehicle trips’ data can be stored in the cloud. Important events and notifications can be reviewed with the chosen functions.


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Kvaser Sontheim