Smart Ring Firmware & App
Budget: $1,500 – $3,000 USD
I’ve completed the hardware design of a smart ring built around the nRF52810 SoC. It includes MAX30102 (SpO₂/heart rate), TMP117 (temperature), ADS1115 (strain sensing), and BQ25120A (battery/charging).
I’m looking for a developer to handle firmware and mobile app development.
Tasks:
Write firmware for nRF52810 using nRF SDK or Zephyr.
Interface all I²C sensors and stream data over BLE.
Create a simple mobile app (Flutter or React Native) to show heart rate, SpO₂, temperature, strain, and battery level.
Ensure low-power operation and stable BLE connection.
Deliver tested firmware (.hex + source) and app (.apk + source).
You should have:
Strong nRF52 BLE experience (custom GATT services).
Good knowledge of I²C sensor drivers.
Prior wearable or IoT BLE project experience.
What I’ll provide:
Schematic, BOM, pin map, and full hardware details.
I’m looking for a developer to handle firmware and mobile app development.
Tasks:
Write firmware for nRF52810 using nRF SDK or Zephyr.
Interface all I²C sensors and stream data over BLE.
Create a simple mobile app (Flutter or React Native) to show heart rate, SpO₂, temperature, strain, and battery level.
Ensure low-power operation and stable BLE connection.
Deliver tested firmware (.hex + source) and app (.apk + source).
You should have:
Strong nRF52 BLE experience (custom GATT services).
Good knowledge of I²C sensor drivers.
Prior wearable or IoT BLE project experience.
What I’ll provide:
Schematic, BOM, pin map, and full hardware details.