The Arduino Nano 33 IoT appears in designs for automated plant watering, a cloud-controlled LED coaster and home environmental monitoring. The compact board has built-in Wi-Fi and Bluetooth Low Energy, while each project adds hardware and software for its particular task.
Automated plant watering
Arduino’s automated-watering example lists the Nano 33 IoT alongside a soil moisture sensor, relay and water pump. Arduino says its cloud service displays real-time data and supports remote pump activation, either manually or automatically when the soil becomes too dry.
Sensor calibration is a separate consideration. DFRobot says its waterproof capacitive soil moisture sensor requires calibration to establish its measurement range. The company documents changes in readings with soil conditions, compaction and insertion depth, as well as variation between individual sensors.
A cloud-controlled LED coaster
Project creator Mastoras Inc describes a smart coaster built around a Nano 33 IoT, a circular printed circuit board, a 9V battery and 32 LEDs. The design specifies eight LEDs in each of four colors: red, blue, green and white. A 3D-printed case houses the electronics.
The creator describes an Arduino Cloud dashboard with four sliders for adjusting LED brightness. The documented construction process includes breadboard prototyping, circuit-board design, programming, soldering and assembly inside the printed enclosure.
Home environmental monitoring
In a home-monitoring project documented in 2020, Jithin Sanal describes using a Nano 33 IoT to collect temperature, humidity, pressure, ambient-light and gas-sensor readings. His design sends data to Ubidots for storage and display in a dashboard accessible remotely.
Sanal also says the system can send warnings by SMS, email or Telegram if it detects a dangerous condition. He presents these notifications as a feature of the monitoring project, alongside remote access to its environmental readings.
