Opensource DUCO Co2 and temperature sensor. (known as Duco CO2 sensor 0000-4216)

The following is released: Schematic B.O.M (Bill Of Materials) Gerber Files 3D files of the Housing Schematic: Download Schematic: B.O.M: Gerber Files: Change file name to: 00000-4216-Co2-Sensor.Gerber.V2.1.zip (add Z to zip) Step File of PCBA Housing Files: When 3D printing add support to the TOP side underneath the clips. More info on Github:

Xiaomi Air Purifier 001 PPM FIX!

I received an email from Pekka (Thanks!) who found out about this problem in a video/comment. Two distinct signs: Slow to respond to particle changes. Display only shows 001 Cause: The sensor used in the Xiaomi Air Purifiers is the: PMS9003M by Plantpower Datasheet: This sensor uses a pin named SET. The function of that… Continue reading Xiaomi Air Purifier 001 PPM FIX!

Opensource Duco Vochtsensor (Moisture Sensor) (0000-4218)

The following is released: Schematic B.O.M (Bill Of Materials) Gerber Files 3D files of the Housing Schematic: Download Schematic: B.O.M: Gerber Files: Change file name to: 0000-4218-vochtsensor-humidity-sensor-SHT-20.GERBEer_V2 .zip (add Z to zip) Step File of the PCBA: Housing: When 3D printing add support to the TOP side underneath the clips.

Xiaomi Air purifier 3H/C/PRO NFC MOD, How does it work?

After opensourcing the mod chip I wanted to give some insights on how the mod-chip itself works. open source info: click As can be seen in the image above, the system consist out of several sub systems.The two most important sub-systems are: NFC Filter Stm32F412RET6 There are two ways to bypass the NFC filters, Make… Continue reading Xiaomi Air purifier 3H/C/PRO NFC MOD, How does it work?

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