Project Hub /IoT & Connected Devices/Telemetry & Remote Logging/How to Send WhatsApp Messages from ESP32

Beginner

ESP32

₹500 – ₹1,500

3 – 6 Hours

Complete Kit

How to Send WhatsApp Messages from ESP32

This project shows how to send real-time WhatsApp alerts directly from an ESP32 using WiFi and the CircuitDigest Cloud WhatsApp API.

Originally published on CircuitDigest

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 520.00
DHT11 Temperature and Humidity Sensor Module for Arduino Raspberry Pi Rs. 243.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Cable for Arduino Nano (USB 2.0 A to USB 2.0 Mini B) 30cm Rs. 69.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

Browse all components

How It Works

The 'How to Send WhatsApp Messages from ESP32' project integrates hardware sensing with cloud-based messaging to create an automated notification system. At the heart of the setup is the ESP32 development board, which is powered and programmed via a USB cable connected to a computer. A DHT11 temperature sensor is wired to the breadboard and connected to the ESP32 to monitor surrounding environmental conditions. The ESP32 utilizes its built-in Wi-Fi capabilities to connect to a local wireless network. Using the Arduino IDE along with specialized libraries such as WiFi.h, WiFiClientSecure.h, and DHT.h, the microcontroller reads the temperature and humidity data captured by the DHT11 sensor. When specific programming logic or threshold conditions are met, the ESP32 establishes a secure internet connection using HTTPS (facilitated by WiFiClientSecure). It then communicates directly with the CircuitDigest Cloud WhatsApp API by sending an HTTP request containing the sensor data. The cloud service processes this request and instantly routes the message to your designated WhatsApp account, allowing you to receive real-time, remote updates about your physical environment right on your mobile device.

Why Build This

Create your own automated home security or environmental monitoring systems that notify your phone instantly.

Gain practical experience connecting microcontrollers to cloud-based APIs and web services using Wi-Fi.

Build real-world projects like automated greenhouse monitors or remote industrial threshold warning systems for science fairs.

Real-World Application

Remote environmental monitoring, industrial threshold alerts, home automation security warnings, and automated system maintenance reminders.

Skills You'll Learn

Wi-Fi network configuration

HTTP/HTTPS API integration

digital sensor data acquisition

cloud messaging protocols

secure socket communication

Safety Precautions

No specific precautions noted for this build — always follow general electronics safety practices.

Technology Tags

ESP32

WIFI

DHT11

HTTPS

REST API

CLOUD

IOT

SENSORS

Frequently Asked Questions

Do I need a paid WhatsApp business account to use this project?

No, this project utilizes the CircuitDigest Cloud WhatsApp API as outlined in the tutorial, which simplifies sending messages without requiring an enterprise WhatsApp account.

Can I use any other microcontroller besides the ESP32?

This specific project requires a board with built-in Wi-Fi capabilities like the ESP32 to connect to your local network and reach the cloud API. Standard boards like the classic Arduino Uno would need an extra Wi-Fi shield.

What libraries do I need to install in the Arduino IDE?

You will need to ensure you have the DHT.h library for reading the sensor, along with the standard WiFi.h and WiFiClientSecure.h libraries included in the ESP32 board package for network and secure web communication.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01471