Firmware

When developing with ESPHome on ESP32 devices, crashes can be frustrating to debug without proper stack traces. Enabling coredumps provides detailed crash information to help identify the root cause of issues. Configuration To enable coredump functionality, you’ll need to modify your ESPHome configuration and create a custom partition table. This setup is for the Arduino framework - ESP-IDF configurations will differ slightly. ESPHome Configuration Add the following to your ESPHome YAML configuration: ...

Adtran 411 Security Audit Adtran produces equipment for fiber ISPs. I was provided an Adtran 411 by my current ISP for Internet access and decided to take a deep look into it. Hardware The Adtran 411 is a small GPON fiber ONT (Optical Network Terminal) designed to give symmetrical gigabit fiber Internet to SOHO users. It connects to the ISP via a GPON uplink and provides the user a normal ethernet RJ-45 connector to plug their router into and a RJ-11 port for a landline to be tunneled over VOIP. ...

Bambu P1S Hacking contains firmware dumps, PCB analysis, and X-ray scans of the Bambu Labs P1S 3D printer’s ESP32-S3 controller board. The repository documents reverse engineering efforts to understand the printer’s firmware architecture and hardware implementation. The collection includes multiple firmware dumps processed through bin-voter to generate corrected flash images, detailed PCB trace analysis, and hardware documentation. This research provides insights into the printer’s embedded systems and potential modification opportunities.

Bin Voter reconstructs correct binary files from multiple corrupted firmware dumps by implementing a voting algorithm across byte positions. The tool compares corresponding bytes from multiple binary files and selects the most frequently occurring value at each position. This Python utility is designed for firmware recovery scenarios where multiple partial or corrupted dumps are available but no single dump is completely intact. Bin Voter can recover clean firmware images by leveraging statistical analysis across multiple corrupted sources.

This post outlines the process to replace a Tuya radio module with one running ESPHome to fully control a heated mattress pad locally with Home Assistant. I purchased a Sunbeam Heated Mattress Pad for those cold winter nights. The mattress pad controller connects to WiFi and has a remote control app. However, it has a safety feature that limits functionality. The app can only adjust heat levels and turn the pad off unless you’ve recently pressed a physical button on the controller, effectively limiting the app to changing heat levels and turning the device off. ...

This post outlines a security assessment of the new Sena Wifi Adapter I performed last summer for fun. With the world on lock-down due to COVID-19, I spent a lot of time last summer escaping the city going on motorcycle rides through the mountains and forests surrounding the bay area. It’s the perfect social distance activity because if you get within 6ft of someone you are likely to crash. One of my favorite motorcycle accessories is my Sena headset. It allows me to listen to navigation or music from my phone over Bluetooth while riding, and talk to other riders in my group. ...

Sometime in the first half of 2018 there was an explosion of “Dockless e-scooters” appearing all over the Bay Area. These devices are electric scooters that anyone can rent for a one-way trip and find/leave them (at the time) anywhere you want. As one could guess this led to lots of issues but they where convenient and I wanted one of my own so I did a little research onto how to acquire one for private use. ...