Last active
March 30, 2025 19:47
-
-
Save CircuitDigest/1bb72d3661d2429698b7233b5d64b269 to your computer and use it in GitHub Desktop.
Send free SMS using CircuitDigest SMS API on NodeMCU, ESP32, ESP8266etc
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #include <ESP8266WiFi.h> | |
| #include <ESP8266HTTPClient.h> | |
| #include <WiFiClientSecure.h> // Required for HTTPS connections | |
| // Replace with your WiFi credentials | |
| const char* ssid = "Semicon Media"; | |
| const char* password = "cracksen1605"; | |
| // Replace with your API Key | |
| const char* apiKey = "yourapi"; //get api key from circuitdigest.cloud | |
| // SMS details (users can easily modify these) | |
| const char* templateID = "102"; // Template ID //moreinfo: https://circuitdigest.com/article/free-sms-api-for-arduino-esp32-esp8266-nodemcu-raspberry-pi | |
| const char* mobileNumber = "9112345678"; // Mobile number (with country code) | |
| const char* var1 = "Egg Incubator 1"; // Variable 1 | |
| const char* var2 = "above 24.5"; // Variable 2 | |
| void setup() { | |
| Serial.begin(115200); | |
| WiFi.begin(ssid, password); | |
| // Connect to WiFi | |
| Serial.print("Connecting to WiFi"); | |
| while (WiFi.status() != WL_CONNECTED) { | |
| delay(500); | |
| Serial.print("."); | |
| } | |
| Serial.println("\nConnected!"); | |
| // Send SMS | |
| sendSMS(); | |
| } | |
| void sendSMS() { | |
| if (WiFi.status() == WL_CONNECTED) { | |
| WiFiClientSecure client; // Use WiFiClientSecure for HTTPS connections | |
| client.setInsecure(); // Skip certificate validation (not secure but works for development) | |
| HTTPClient http; | |
| // Build the API URL with the template ID | |
| String apiUrl = "https://www.circuitdigest.cloud/send_sms?ID=" + String(templateID); | |
| // Start the HTTPS connection with WiFiClientSecure | |
| http.begin(client, apiUrl); | |
| http.addHeader("Authorization", apiKey); | |
| http.addHeader("Content-Type", "application/json"); | |
| // Create the JSON payload with SMS details | |
| String payload = "{\"mobiles\":\"" + String(mobileNumber) + "\",\"var1\":\"" + String(var1) + "\",\"var2\":\"" + String(var2) + "\"}"; | |
| // Send POST request | |
| int httpResponseCode = http.POST(payload); | |
| // Check response | |
| if (httpResponseCode == 200) { | |
| Serial.println("SMS sent successfully!"); | |
| Serial.println(http.getString()); | |
| } else { | |
| Serial.print("Failed to send SMS. Error code: "); | |
| Serial.println(httpResponseCode); | |
| Serial.println("Response: " + http.getString()); | |
| } | |
| http.end(); // End connection | |
| } else { | |
| Serial.println("WiFi not connected!"); | |
| } | |
| } | |
| void loop() { | |
| // Nothing to do here | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment