water meter / Wasserzähler - AI-on-the-edge

thingiverse

This is a system to take pictures of a water meter for house monitoring the water consumption. It is a part of a house automation system in order to monitor and check the water consumption. The system conists of 3 major parts: 1. Round clamping adapter to my watermeter = screwless fixation system on water meter, that can be adjusted to the individual geometries 2. Tube towards camera - here done with two parts to allow heights adjustment 3. Camera holder for ESP32-CAM with OV2640. The ESP32-CAM modules has an inbuild flash LED, so no additional illumination is needed. The 3D printed parts are connected with a self made spherical bajonet connection (see [here](https://www.thingiverse.com/thing:3270713)) The camera is a all-in-one image processing device: AI-on-the-edge - also described here: [https://github.com/jomjol/AI-on-the-edge-device/wiki](https://github.com/jomjol/AI-on-the-edge-device/wiki) In order to use it as a water meter, the fixed foucs objective of the OV2640 has to be manipulated, as it only results in sharp image for distance bigger than ~40cm. By this the image of the water meter is getting too small for further automated readout processing. **ATTENTION: this will end any warranty as the sealing of the lens objective is broken!** I removed the fixation glue of the OV2640 lens with a sharp knife (see picture). After this I could screw the objective in and out. Rotating it by about a quarter counterclockwise results in a focus plane about 10cm to the lens. You need to figure out your best setting with a little bit of try and error for your specifig environment. Everything is done within the ESP32-module and on the SD card as data storage. The detailed description of the electronic setup can be found here: [https://github.com/jomjol/water-meter-system-complete](https://github.com/jomjol/water-meter-system-complete). There is an intensive discussion on the usage and details in the [iobroker forum](https://forum.iobroker.net/topic/23577/wasserz%C3%A4hler-selfmade). This discussion is in German. For more information do not hesitate to contact me! Have fun, jomjol P.S.: This system is an improved version of [https://www.thingiverse.com/thing:3860911](https://www.thingiverse.com/thing:3860911). Improvement: - No additional external server is needed, the image processing and conversion is fully integrated in the ESP32CAM firmware. - integrated web server as user interface for configuration etc.