This is a multi-board system comprised from two types of devices sensor/hub and inductive charging station. Multi-role multi-connection of BLE interface is key feature of the sensor/hub device. Up to 12 BLE slave sensor devices can connect to one central hub device aggregating traffic and forwarding to mobile phone. In addition to that device have inductive charging capabilities, motion detection, resistance measurement and data streaming and logging.
Requirements:
- BLE interface for device configuration,
- Data streaming and logging,
- Motion detection,
- Power supply via CR2470
Major components:
- nRF52832 & STM32L432
- BMI160
- W25N01
- OPA333, OPA172 & TPS782xx
- BQ24050, LM2587
Number of PCB layers: 4
BOM price: 56 USD
Realization time: 10 weeks
