Xiaomi Modchip open source!

The following will be released: Schematic B.O.M (Bill Of Materials) Geber Files Software binaries (see below) I will write the following tutorials: How to flash your Modchip How to order your Modchip see below Explanation of how the software works. Schematic: Downloadable PDF: B.O.M. This is quite a simple schematic, the hardest part was finding… Continue reading Xiaomi Modchip open source!

Opensource DUCO Humidity and temperature sensor. (known as DUCO Vochtsensor 0000-4218)

Duco Vochtsensor

Two days ago I installed a new ventilation system in my home. My product of choice: DucoBox Silent 400 m3/h. Why:1. Made (or Designed) in the Netherlands.2. On opening up the device, I saw no costs spared on Electrical Safety or components. (Images will follow)3.Fitted nice in my technical room. For the bathroom I went… Continue reading Opensource DUCO Humidity and temperature sensor. (known as DUCO Vochtsensor 0000-4218)

How to install Xiaomi Air purifier Mod Chip to your 3H 3C or Pro device.

Step 1:Remove the power cord and wait until the device is fully powered off.Failing of this step has a high risk of electric shock or damaging the air purifier. Step 2:Turn the device upside down. Step3:Remove the four rubber feet. (I used a flat screwdriver to wiggle them out) Step 3.5:Remove the four Phillips screws… Continue reading How to install Xiaomi Air purifier Mod Chip to your 3H 3C or Pro device.

Xiaomi Air Purifier 3H/C/PRO MODCHIP is here!

After a couple of nights tinkering ,PCBA designing , software writing and a couple of PCBA revisions later success: (see GIF , above) Why: Using these air purifiers is a wasteful and expensive experience. There are no third party filters on the market , and no options to disable the NFC check. I wanted to… Continue reading Xiaomi Air Purifier 3H/C/PRO MODCHIP is here!

Xiaomi Air Purifier 3H Reverse Engineering Part 3: ESP32 DUMP

Yesterday, I received a mail! By a user named : tuxuser. I thought I was alone in the world of Xiaomi Air purifier poking… Since more people are getting involved I decided to update some more information on the web! I dumped the ESP Flash contents using : Link (look closely and you will see… Continue reading Xiaomi Air Purifier 3H Reverse Engineering Part 3: ESP32 DUMP

Xiaomi Air Purifier 3H Reverse Engineering Part 2: Fremont EEPROM dump

As stated in the first post, the main PCBA contains a Fremont EEPROM. I used one of many Chinese flash tools (mine is a SP8-F made by fly-pro…) ROM dump: The first thing I do with a ROM dump is to analyze the data using a website called : http://binvis.io I then upload my binary… Continue reading Xiaomi Air Purifier 3H Reverse Engineering Part 2: Fremont EEPROM dump

Installing and using ESPtools

Step 1.Install Python (On Windows 10) Option 1: On Windows 10, you may type “python” in the Windows search box beside the Windows Start button and download Python from the Windows App Store. Option 2: Download the latest version of python from their website: click Don’t forget to check the “Add Python X to PATH”… Continue reading Installing and using ESPtools

Xiaomi Air Purifier 3H Reverse Engineering Part 1: Probing Around

Welcome to the family Xiaomi Air Purifier H3! If something enters my house I open it as quickly as possible and start probing around. The following information is for educational Purposes only! Note, I absolutely love Xiaomi stuff since it is cheap, of decent build quality, and it’s fun to probe around in! How to… Continue reading Xiaomi Air Purifier 3H Reverse Engineering Part 1: Probing Around