TYRE PRESSURE MONITORING SYSTEM USING BLUETOOTH LOW ENERGY




A tyre pressure monitoring system (TPMS) aims to monitor air pressure on various automotive systems. The most common TPMS sensors mainly use sub-GHz radio standards to transfer information to the vehicle’s computer. There are two different types: direct (dTPMS) and indirect (iTPMS). The use of bluetooth low energy (BLE) connectivity makes it possible offering a high performance. All information will be displayed in real-time by simple user interface with low power consumption. With low power consumption, applications can run on a small battery for many years. As result, it’s actually extremely positive when talking about M2M communication and automotive systems.

TYRE PRESSURE MONITORING SYSTEM USING BLUETOOTH LOW ENERGY

TPMS helps to avoid the tyre wear and improves road safety.  Due to the advantages of a longer battery life and connectivity, DA14585 is suitable for IoT applications in various industries. The figure 1 show a typical block diagram for a TPMS system.

Bluetooth low energy for automotive industry

Connectivity, Intelligence and energy saving are the main features for the new generation of IoT devices. Luckily, SmartBond can achieve all these features. Especially relevant is one of the series, DA14585 SoC. It offers all benefits, such as, full support of all bluetooth standards, including version 5. Moreover, it is suitable  for many applications, as remote controls, proximity tags, headlights, connected medical devices, smart home and smart automotive (Figure 2). The figure 2 shown the block diagram of DA14585, where is visualized the ARM M0 core and other peripherals.

With 96 kB of RAM and retention capability, DA14585 offers a wider memory than its predecessor in order to fully utilize standard features. Moreover, it also includes an integrated microphone interface for low-cost voice support. DA1485 supports a wide range of power supply voltages from 0.9 to 3.6 V. This range offers a wider choice of energy sources with a great design performance.

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