https://okyang.github.io/ A solar-powered time-lapse camera for your plants :seedling:. Visit the Project Page 🔧 Sun, 19 Apr 2026 00:00:00 -0400 https://okyang.github.io/2026-04-19-esp32-plant-cam/ https://okyang.github.io/2026-04-19-esp32-plant-cam/ AQI Buddy is a minimal air quality display using a Wio Terminal and Plantower PMS503. It is designed to be portable so you can measure the air quality anywhere you go. For example, the air quality when cooking, driving on the highway, outdoors, indoors, etc. Youtube Video Instructables Hackster.io Visit... Tue, 30 Dec 2025 00:00:00 -0500 https://okyang.github.io/2025-12-30-aqi-buddy/ https://okyang.github.io/2025-12-30-aqi-buddy/ Another iteration of the classic motion activated pi camera project. This one will save videos to a platform called Gofile - Free file sharing and storage platform. Features Senses motion Records video that is converted to a MP4 format Sends MP4 files to Gofile - Free file sharing and storage... Tue, 06 Sep 2022 00:00:00 -0400 https://okyang.github.io/2022-09-06-pir_activated_cam_2/ https://okyang.github.io/2022-09-06-pir_activated_cam_2/ This project shows you how to send temperature and humidity telemetry to Adafruit IO using the LYWSD03MMC and a Raspberry Pi. Using Bluetooth communication we find the broadcast of the LYWSD03MMC and communicate its readings to Adafruit IO. It’s a cute little temperature and humidity sensor with LCD display as... Sun, 20 Feb 2022 00:00:00 -0500 https://okyang.github.io/2022-02-20-temp_humid_monitoring_adaio/ https://okyang.github.io/2022-02-20-temp_humid_monitoring_adaio/ Air Quality Index (AQI) uses pollutants such as Particulate Matter 2.5 microns (PM2.5) to indicate air quality. This is a topic that I have been interested in for quite a while as PM2.5 is an important indicator of air pollution. It is invisible, yet it can cause serious health effects.... Sun, 20 Feb 2022 00:00:00 -0500 https://okyang.github.io/2022-02-20-aqi_monitoring_adaio/ https://okyang.github.io/2022-02-20-aqi_monitoring_adaio/ This project records videos whenever there is any motion detected. This could be used as a security camera for your snacks, a backyard wildlife monitor, and more. My Raspberry Pi had some issues with its GPIO pins and I also learned that some specific sensors do not work well with... Fri, 17 Sep 2021 00:00:00 -0400 https://okyang.github.io/2021-09-17-pir_activated_cam/ https://okyang.github.io/2021-09-17-pir_activated_cam/ A continuation of the ZotBins Project, called ZotBins Community Edition (ZBCE), an open-source project. I further work with the ZotBins team at UCI to help expand the concept of ZotBins where any city, business, university, classroom, or home could implement a smart waste metrics system. Visit the Project Page 🔧... Tue, 17 Aug 2021 00:00:00 -0400 https://okyang.github.io/2021-08-17-zbce/ https://okyang.github.io/2021-08-17-zbce/ ZotPonics is a Smart and Automated Hydroponics system for Sustainable Agriculture. With a system of sensors, pumps, lights, and other peripherials that are controlled by a mobile-based user-interface where people can grow tasty vegetables or any plants right from the comfort of their own home. It is 85% more water... Mon, 16 Aug 2021 00:00:00 -0400 https://okyang.github.io/2021-08-16-zotponics/ https://okyang.github.io/2021-08-16-zotponics/ ZotBins is system of Smart Waste Bins with a Web-based User Interface to collect real-time waste data. Through IoT, ZotBins is able to use waste data to encourage zero waste practices from a behavioral approach while also demonstrating use of quantifiable data to improve waste management systems holistically. Visit the... Mon, 16 Aug 2021 00:00:00 -0400 https://okyang.github.io/2021-08-16-zotbins/ https://okyang.github.io/2021-08-16-zotbins/ Have you ever been in a situation where you have trash, but you don’t know how you should throw it away? This app allows users to scan barcodes of certain items that they want to throw away and the app will return detailed instructions of how to properly dispose of... Mon, 16 Aug 2021 00:00:00 -0400 https://okyang.github.io/2021-08-16-barcode_waste_scanner/ https://okyang.github.io/2021-08-16-barcode_waste_scanner/