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Inside the Pebble HR

A detailed look at the internals of the Pebble HR smartwatch

Pebble HR Teardown

The Pebble HR (Pebble 2) introduced heart rate monitoring to the Pebble lineup. Here's a look at what's inside this innovative smartwatch.

Pebble HR Teardown

The main board with the e-paper display controller

Pebble HR Components

Heart rate sensor and battery components

Key Components:

  • STM32 ARM Cortex-M3 microcontroller
  • 1.26-inch e-paper display
  • Optical heart rate sensor
  • Bluetooth 4.0 LE module
  • 3-axis accelerometer
  • Vibration motor
  • 200mAh lithium-ion battery
The heart rate sensor uses LED lights and a photodiode to detect blood flow through your wrist.