BLE + LORA : PPG / Temp / 9DOF IMU sensors Wearable device

Wearable health recording device, comprised of a) Motherborad and up to b) 2 daughter boards Requirements: Low power / Bluetooth / small size factor HARDWARE DESIGN MotherBoard ("MB") MCU: LORA ISP4520 from Insight SP based on nRF52x - 1x IMU 9DOF [TBD Bosh / TDK] - Switch on/off button - LED: pairing / on - 1x Analog connector - 2x external antennas connectors - Debug pad Size : 15x25mm Daughterboard ("DB") - 1x Skin Temperature sensor (could be TMP 117) - 1x Max 30102 Maxim Integrated / [see example MAXREFDES117#: Heart-Rate and Pulse-Oximetry Monitor, ] Size : 10x10mm Max30102 and temp sensor can be on a flexible PCB board connected to the Motherboard (MB) Motherboard and Daughter board connected through flat flexible cable, 10cm long, . Power: Lipo battery ~350mHA FIRMWARE DEVELOPMENT DFU - OTA 1. Training Mode (over bluetooth BLE) Initialize Connect to mobile App Run Heart Rate algorithm (to be provided by us) Collect sensor data (temperature, motion, raw sensor data, calculated HR, battery level indicator) 2. Monitoring Mode (over LORA) When in Monitoring mode, send calculated HR et Temp every [1min] over LORA Output file format to be provided by us User select between 1. or 2. using mobile phone App (over BLE). Specs: 5 samples prototype / Seeedstudio, testing and debugging FW PlatformIO HW Design using Eagle