GreenApi Arduino Library

The GreenApi Arduino Library allows you to easily send WhatsApp messages from your Arduino projects using the Green-API service. This library simplifies the process of integrating WhatsApp messaging capabilities into your Arduino sketches.

Introduction

The GreenApi library provides a simple interface to interact with the Green-API service for sending WhatsApp messages. It abstracts away the complexities of HTTP requests and JSON formatting, allowing you to focus on your project's functionality.

Getting started

Setup Green API account

Nevigate to https://green-api.com/en and register for a new account:

Fill up your details and click on Register:

Next, click on the "Create an instance":

Select the "Developer" instance (Free):

Copy the InstanceId and Token, we need it for the integration settings:

Next, Lets connect our whatsapp with green-api. On the left side, Under API --> Account, click on QR and copy the QR URL to the browser and click on "Scan QR code"

Next, Scan the QR code to link you whatsapp with Green API:

After the account link, you will notice that the instance is active by the green light in the instance header:

Getting the Contacts and Groups

Before we can start messaging, we need to get the Contact/Group details. we can do it using Green API endpoint. On the lef side, Under API --> Service methods, click on "getContacts" and then click "Send":

As a result, you will get the list of Contacts and Groups.

• The contact number ends with @c.us
• The group number ends with @g.us

Write down the Id, you will need it to configure the notification.

Installing the library

To use the GreenApi library in your Arduino projects, follow these steps:

1. Download the latest release of the GreenApi library from the GitHub releases page.
2. Extract the downloaded ZIP file.
3. Move the extracted folder to the libraries directory in your Arduino sketchbook.
4. Restart the Arduino IDE.

Usage

Here's a simple example sketch demonstrating how to use the GreenApi library to send a WhatsApp message:

#include <Arduino.h>
#include <WiFi.h> // Include WiFi library if connecting to WiFi
#include <GreenApi.h>

const char* ssid = "YourWiFiSSID";
const char* password = "YourWiFiPassword";
const char* instanceId = "YourInstanceId";
const char* instanceToken = "YourInstanceToken";
const char* target = "YourChatId";
const char* message = "Hello, this is a test message from my new library!";

// Create an instance of the GreenApi class
GreenApi greenApi(instanceId, instanceToken);

void setup() {
  Serial.begin(115200);
  delay(1000);

  // Connect to Wi-Fi (if needed)
  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to Wi-Fi!");

  // Send message using GreenApi
  Serial.println("Sending message...");
  greenApi.sendMessage(target, message);
}

void loop() {
  // Your code here
}