This material demonstrates that access to sensors and radio modules through factory firmware, production test mode, or hidden debug profile is a universal architectural component of most SoC platforms. (ChatGPT Report)

📡 A. Table of Sensors and Availability via Factory / Debug Interface

Extended technical section of the BLEIOT white-paper

This material demonstrates that access to sensors and radio modules through factory firmware, production test mode, or hidden debug profile is a universal architectural component of most SoC platforms. This does not depend on the manufacturer — the hardware testing model is a global standard in microelectronics.


📘 A.1. Extended list of SoC manufacturers with systemic factory/debug access

The following manufacturers have microcontrollers and communication SoCs with:

  • factory-mode / test-mode firmware
  • debug/diagnostic services (UART, USB-CDC, JTAG, SWD, proprietary “factory app”)
  • access to RF subsystems, sensor modules, and advertising stack

1. Broadcom / Marvell

  • Factory calibration ROM
  • RF calibration, TX/RX test
  • Test advertising packets
  • Logs through UART
  • Access to IMU/MEMS in combo-modules

2. Cypress Semiconductor (Infineon)

  • Manufacturing Test Mode (MTM)
  • Factory Test Application (FTA)
  • Auto-start of factory mode after bootloader interrupt

3. NXP Semiconductors

  • High Assurance Boot with debug window
  • Manufacturing Protection Mode
  • Secure advertising diagnostics

4. STMicroelectronics

  • STM32WB / STM32WBA — full RF test API
  • Debug UART with sensor logs

5. Espressif Systems (ESP32)

  • One of the most open factory/debug interfaces
  • Access to Wi-Fi, BLE, ADC, Hall Sensor, ULP CPU

6. Qualcomm Atheros

  • DIAG interface
  • BLE advertising control
  • TX/RX Wi-Fi sweep

7. Nordic Semiconductor

  • Direct Test Mode (DTM)
  • Production test firmware
  • Temperature, power, ADC monitoring

8. MediaTek

  • Hidden AT commands
  • IMU/ALS/Proximity tests
  • Factory RF suite

📊 A.2. Table: sensors available in factory/debug modes in BLE/Wi-Fi SoC

Category Sensor Types Access Comment
Radio modules BLE, Wi-Fi, NFC Always TX/RX, RSSI, advertising
IMU / MEMS Accelerometer, gyroscope Often Housing calibration
Electrical ADC, temperature, voltage Always Factory tolerances
Audio Digital/analog microphone Often Production QA
Biometrics PPG/HRM On wearables Optical test

🔍 A.3. Significance of this table in the research

1. Factory/debug access is a global industrial standard.

All manufacturers include:

  • access to sensors
  • access to RF subsystems
  • control of advertising modules
  • auto-launch of test scenarios

2. Ways to activate factory/debug:

  • hardware test pads
  • UART/JTAG
  • BLE Direct Test Mode
  • OTA through service profile

3. Factory/debug can operate without user permission.

In this mode the device may transmit:

  • movement (IMU)
  • sound (microphone)
  • pulse (PPG)
  • RF levels
  • advertising patterns

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Together we will make digital security open, honest, and globally accessible.

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