This video presents a detailed teardown and reverse-engineering attempt of a disposable capsule endoscopy device, commonly known as a "pill camera." The presenter carefully disassembles the sealed, waterproof plastic capsule, revealing a surprisingly complex internal architecture built on a stack of small PCBs. Key components identified include a camera module with an image sensor and lens, four illumination LEDs, a flexible wraparound antenna, two coin cell batteries, and a large internal magnet. The core of the device is a Texas Instruments CC1310 sub-GHz RF microcontroller, accompanied by other unidentified chips likely responsible for image processing and power management. The investigation confirms a light sensor is used to activate the device from a sleep state. However, attempts to dump the firmware and analyze the software were unsuccessful, as the microcontroller's SWD (Serial Wire Debug) interface was locked, preventing further access.
A Teardown of a Disposable Pill Camera
0:00:06 - Device Introduction: The video introduces a capsule endoscopy or "pill camera," a disposable, ingestible device with a camera, battery, and RF transmitter designed to capture images inside the digestive tract. The goal is to tear it down and potentially power it on.
0:02:36 - Destructive Teardown: The presenter begins the disassembly by carefully cutting and prying open the sealed plastic dome, eventually using pliers to break through the casing to access the internal electronics without damaging them.
0:04:48 - Light-Based Activation: A front-facing sensor, initially mistaken for an antenna, is identified as a light sensor. The presenter theorizes this is used to wake the device from a sleep state when its packaging is opened, confirming it is a single-use product.
0:05:54 - Core Components Revealed: The internal assembly is removed, revealing a flexible printed circuit (FPC) that wraps around the entire module and functions as an antenna.
0:06:18 - Texas Instruments RF Microcontroller: The main processor is identified as a Texas Instruments CC1310, a microcontroller with an integrated sub-GHz RF transceiver (operating between 400-900 MHz) for transmitting the images.
0:09:25 - Large Internal Magnet: A significant portion of the internal volume is occupied by a large, powerful magnet. Its exact purpose is unclear, though the presenter notes that some similar devices use external magnets for activation.
0:10:34 - Multi-Chip Architecture: Further disassembly reveals multiple stacked PCBs containing the CC1310, another chip labeled "L Y 215C" (likely an image processor), and several other unidentified components for power regulation and control.
0:15:02 - Activation Confirmed: By supplying external power, the presenter confirms the activation mechanism. The device remains in a low-power sleep mode until light hits the front sensor, at which point the current draw increases, and the device wakes up.
0:15:50 - Firmware Access Denied: Attempts to reverse engineer the device's software fail. The SWD (Serial Wire Debug) interface on the CC1310 microcontroller is locked, and the UART bootloader is inaccessible, preventing the firmware from being read.
0:16:42 - Limited Functionality: Although the device can be powered on, causing the illumination LEDs to blink periodically, the locked firmware prevents any further interaction or understanding of its communication protocol.