ESP32 SIM800L Fire & Gas Alarm with SMS Alerts (No WiFi)
An ESP32 + SIM800L system that detects fire and gas, sends SMS alerts, and answers "status" texts — no WiFi …
Featured
Latest Post
Read Schneider PM2100 Power Meter Data with ESP32 (Modbus RS485 Tutorial)
Learn how to connect a Schneider PM2100 power meter to an ESP32 using an RS485-to-TTL module and Modbus RTU. Read live voltage and frequency data, understand the register map, wire the circuit, and build your …
Recent Tutorials
View all
ESP32 MQTT Tutorial: Send Sensor Data & Control an LED with MQTT Bhai
Learn how to connect an ESP32 to an MQTT broker and use MQTT Bhai to monitor sensor data and remotely …
How to Connect ESP32 to AWS IoT Core Without Wi-Fi Using SIMA7670G (Full Tutorial)
Learn how to connect your ESP32 to AWS IoT Core over 4G LTE using the SIMA7670G module — no Wi-Fi …
Chapter 4: Hardware and Tools Buying Guide | Phase 1
Bridge the gap between software and the physical world. Discover the exact ESP32 starter kit, expansion modules, and "forever" engineering …
How to Get GPS Data with LILYGO T-A7670G (ESP32 4G LTE)
Learn how to extract precise GPS location data using the LILYGO T-A7670G. This step-by-step tutorial covers hardware setup, active antenna …
Getting Started with LILYGO T-A7670G: ESP32 4G LTE & GPS Setup Guide
Learn how to connect the LILYGO T-A7670G development board to a cellular network. This step-by-step guide covers hardware features, board …