IoT RFID reader

IoT RFID reader thumbnail
RFID is a conveninent technology for access control and authentication. In this project, I connected an RC522 RFID reader to an ESP32 in order to use it for IoT applications. Additionally, to provide feedback to the user, the ESP32 is also connected to an SSD1306 OLED display and a buzzer. I chose an ESP32 over an ESP8266 simply because of the amount of GPIOs required.
ESP8266RFIDPCB designProjectsIoT +1

HUD Goggles

HUD Goggles thumbnail
This headset enables the overlay of information on top of its user's field of view. The field of view of the user is captured by a camera and then fed to video goggles, while a MAX7456 OSD chip overlays text on the video feed.

IoT EM4305 RFID Reader

IoT EM4305 RFID Reader thumbnail
RFID tags come in various forms and sizes, from standard plastic cards to chips that can be implanted in one's hand. I got particularly interested in RFID rings, which can be purchased online for less than USD 20$. Those are based on EM4305 chips, which require a compatible reader. Thus, I designed an IoT EM4305 reader that can exchange data over MQTT with other devices.

Cashless payment system

Cashless payment system thumbnail
A company I worked for had a coffee machine for which employees could purchase coffee. However, the payment was done by putting coins in a jar. Not only did this present the obvious risk of theft, this system was also impractical for people not carrying spare change at all time. I decided to solve this issue by designing this cashless payment system.
ElectronicsProjectsIoTMongoDBNode.js +1

IoT lock

IoT lock thumbnail
Have you ever left your apartment and couldn't remember if you locked your front door or not? Sadly, if it is unlocked, there is not much you can do about it until you get back home. This system is an attempt to solve the problem. Simply put, it consists of attaching an actuator to the door's original locking mechanism control it with through WiFi.
FeaturedMechatronicsCAD3D printingIoT +3

IoT air conditioner controller

IoT air conditioner controller thumbnail
Air conditioners consume a fair amount of electricity. As such, forgetting to turn one off before leaving one's home can result in an expensive electricity bill. This is a Wi-Fi enabled controller for air condtioners, which can turn the unit on or off according to MQTT messages. It is built around an Wemos D1 mini and interfaces with the AC using an IR LED.

Control IoT devices with a Xiaomi Mi Band 2

Control IoT devices with a Xiaomi Mi Band 2 thumbnail
Smartwatches can be rather expensive and tend to be known for their poor battery life. On the other hand, Xiaomi's Mi band 2 is cheap and its battery lasts for up to 20 days. However, the Mi band 2 is mainly limited to fitness tracking functions, at least without the appropriate apps.

WiFi light bulb controller

WiFi light bulb controller thumbnail
Wifi controlled smart light bulbs can now be purchased from less than USD 10. However, those can often only be used by a specific application provided by the vendor and can involve exchanging data with a third party server. I wanted a solution to use my own software while benefiting from the cheap hardware so I replaced the wifi module of a a cheap Wifi light bulb my own electronics.
SMDProjectsIoTWIPPCB design +1

An RFID ring as a front door key

An RFID ring as a front door key thumbnail
Global warming and the COVID-19 pandemic are some the many challenges humanity is having to face. However, I somehow decided that the problem I was going to solve is having to take my keys out of my pocket whenever I lock or unlock my front door.

Multi-user MQTT platform

Multi-user MQTT platform thumbnail
Mosquitto is usually the first candidate to come to mind when looking for an MQTT broker. However, by default, Mosquitto manages users using a password file. This makes it difficult to easily add or remove users, especially when the broker is deployed in Kubernetes.
ProjectsKubernetesMQTTWIPSecurity +1