Learn MQTT
I have launched a dedicated, free-to-use public MQTT broker for the developer community! Whether you are testing an ESP32 or building a web dashboard, click here for the connection details, ports, and code examples to get started with mqtt.iotbhai.io.
Arduino
Struggling with the SIM800L blinking fast and never connecting? The problem is almost always power. In this first episode of GSM Bootcamp, I show you how to build a robust circuit using a voltage booster and capacitor to ensure your Arduino IoT project gets a stable signal every time.
ESP32-CAM
Encountering the human_face_detect_msr01.hpp compilation error on your new ESP32-S3 Cam? This usually happens with ESP32 Board Manager v3.0+. Check out this simple code tweak to resolve the issue and get your video streaming instantly without downgrading your tools.
ESP32
Control your ESP32 via WhatsApp! This tutorial builds a complete two-way bridge using Python & MQTT. Send "LED ON" from your phone and get a real-time reply from your device confirming the action.
ESP32
Deploying IoT devices is easy, but updating them once they are mounted on a wall is hard. Discover how to turn your Google Drive into a free, reliable server for ESP32 Over-The-Air (OTA) updates. Save money on cloud hosting and skip the complex server configuration with this "IoT Bhai" guide.
ESP32
Tired of heavy libraries and infinite boot loops? Learn to build a professional, lightweight ESP32 WiFi Manager from scratch. This guide covers a custom "Verify-Before-Save" feature that tests credentials before storing them, ensuring your IoT devices are reliable and user-friendly.
ESP32
The ultimate guide to setting up ESP32 on Arduino IDE 2.0. This post covers the Board Manager URL, driver installation (CP210x/CH340), and critical permissions for both Windows and Ubuntu Linux users. Fix common connection issues and start coding today.
ESP32
Stop hardcoding Wi-Fi credentials! Learn how to build a professional configuration mode for your ESP32 using the Preferences library and a WebServer.
ESP32
Securing your firmware is critical. In this tutorial, we ditch the public clouds and build a secure, automated Over-the-Air (OTA) update system for the ESP32 using Private GitHub Repositories and Personal Access Tokens.
SIM800L
Learn how to perform remote OTA firmware updates on ESP32 using the SIM800L GSM module (2G). A complete guide to building a Python Flask update server for IoT devices without Wi-Fi coverage.
SIM800L
In Part 5 of the GSM IoT Series, we ditch Wi-Fi and go cellular! Learn how to publish sensor data and control your ESP32 from anywhere in the world using a SIM800L module and MQTT. Includes full code and wiring diagrams.
SIM800L
Does your remote IoT project need accurate time but lacks WiFi? Forget expensive RTC modules! In this tutorial, we use the SIM800L GSM module to fetch precise atomic time from an NTP server over GPRS. Perfect for data logging in the field.