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:
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!
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.
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?
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!
I often get the question what tools do you use for Hacking Hardware/ Software.While making this list I realize the fortune of equipment that I’ve gathered over time.. (sorry for not including cheaper stuff… I’ve replaced allot over time) Non of the links are affiliate links. I’m not getting paid to list any of these… Continue reading (Hardware) Hacking tools
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)
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.
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!
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