Send WhatsApp Alerts Using Arduino UNO R4 WiFi (No GSM, No API Headache)

If you’ve ever tried sending notifications from an Arduino project, you’ve probably run into the usual problems. GSM modules, SIM cards, or complex APIs that feel like overkill for a simple alert system. It works, but it’s not exactly fun. This project we Send WhatsApp Messages using Arduino with the help of circuitdigest cloud API takes a much simpler route. Instead of dealing with telecom hardware or complicated setups, you can send WhatsApp messages directly from an Arduino UNO R4 WiFi using a simple HTTPS request. That means your Arduino connects to WiFi, sends data to a cloud service, and the message lands on your phone instantly. What This Project Does The idea is straightforward. An ultrasonic sensor measures distance continuously. When an object comes closer than a defined limit, the Arduino sends that data to the cloud, which then delivers a WhatsApp message. It turns your Arduino into a real-time alert system. This can be used for proximity detection, parking alerts, or even