Teardown
Inside the Pebble HR
A look at the first heart-rate Pebble — useful context before you attempt a battery job.
Key components
- STM32 ARM Cortex-M microcontroller family
- E-paper display + controller
- Optical heart-rate sensor (LED + photodiode)
- Bluetooth LE module
- 3-axis accelerometer
- Vibration motor
- ~200 mAh Li-ion pack (verify before ordering replacements)
