Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy Brand_Dagu Product Dimensions: 50

Product Dimensions: 50

just make sure your battery can handle it

The Polar T34 Non-Coded Heart Rate Transmitter monitors and then wirelessly transmits your heart rate data from the chest strap to a Polar WearLink+ compatible receiver

8bit Embedded MMC

etc as you would into a normal Pi

Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy Brand_Dagu Product Dimensions: 50Add reliable Bluetooth Low Energy to your project with the Adafruit Bluefruit LE UART Friend. It works with any hardware or software serial port and includes hardware flow control for stable data transfer. Use it as a simple UART data link between your microcontroller and an iOS or Android deviceperfect for wireless control, debugging, or testing via the Bluefruit mobile apps or your own custom BLE setup. Would you like to add powerful and easy to use