Send SMS with Arduino UNO R4 via Internet
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Discover how to send SMS using Arduino UNO R4 Wi-Fi without a GSM module. This project utilizes the Circuit Digest Cloud API and a basic web interface to deliver real-time text messages over the internet, ideal for IoT and alert systems.
Send SMS with Arduino UNO R4 via Internet
- 2. Learn how to send SMS alerts using Arduino UNO R4 WiFi without a GSM module. We use the CircuitDigest Cloud API, a free service to send SMS via the internet. This method is cost-effective and perfect for IoT applications like: Home security notifications Sensor alerts (fire, gas, motion) Industrial status messages Send SMS with Arduino UNO R4 via Internet
- 3. Components Needed Arduino UNO R4 WiFi USB to Micro USB-B Cable 12V DC Adapter / 5V USB-B Adapter Computer with Arduino IDE Internet Connection
- 4. Initial Setup and Configuration Install Board Support in Arduino IDE Register on CircuitDigest Cloud Sign up or log in, and generate a free SMS API key. Link Your Mobile Number Add and verify your Indian mobile number on the dashboard. Each API key allows up to 100 free SMS/month.
- 5. Arduino Code Overview WiFiS3.h – To connect the Arduino to a WiFi network. Connects to WiFi using SSID and password. Sends a POST request to the SMS API with Execution: When Arduino is reset, it automatically sends the SMS. Serial monitor prints status updates.
- 6. Code Implementation and Working Use Cases: Security Alerts: Motion or intrusion detection systems. Home Automation: Send messages when an appliance is turned on/off. Sensor Warnings: Gas leaks, temperature spikes, smoke detection. Industrial Alerts: Notify operators of fault or emergency conditions.
- 7. For a more in-depth tutorial: https://circuitdigest.com/microcontroll er-projects/how-to-send-sms-with- arduino-via-internet www.circuitdigest.com Robotics Projects|Arduino Projects|Raspberry Pi Projects| ESP32 Projects | AI Projects | IoT Projects