This ESP32 BLE client example shows how to scan for a BLE server, find a specific service and characteristic by UUID, connect to the device, read data, subscribe to notifications, and write values back to the server. It is a…
This example shows how to use BLE5 extended scanning on the ESP32-C3 and ESP32-S3 with the Bluedroid stack. It scans for extended advertisements, looks for a specific advertiser name, and then creates a periodic advertising sync so the ESP32 can…
Unlock advanced Bluetooth capabilities on your ESP32-C3 or S3. This article explains how to use the Bluedroid stack to run multiple, distinct BLE advertising sets simultaneously from a single chip, bridging the gap between legacy BLE 4.x compatibility and high-performance…
Summary : Learn how to implement BLE 5.0 Extended Scanning on the ESP32-C3 and ESP32-S3. This guide breaks down the C++ Bluedroid code required to detect both legacy BLE 4.x and modern BLE 5 extended advertising packets, giving you complete…
This beginner guide explains a typical ESP32 BLE beacon scanner sketch: how scanning works, what RSSI means, how to detect iBeacon/Eddystone (or any BLE advertising packet), and how to filter by MAC address, UUID, or name. You’ll also learn the…
This beginner guide explains Espressif’s ArduinoOTA example for ESP32. You’ll learn what OTA is, how the ESP32 advertises itself on your network, how the upload works in Arduino IDE, what each callback means (start/progress/end/error), and the most common fixes when…
This beginner guide explains how to wire a pushbutton to an ESP32 and use it to control an LED. You’ll learn what digitalRead() returns, why pinMode() matters, and how to avoid the most common beginner issue: a floating input (random…
This beginner guide explains the famous Blink sketch line-by-line on an ESP32/Arduino board. You’ll learn what setup() and loop() do, how pinMode() works, what HIGH/LOW really mean, and why delay(1000) makes the LED blink once per second (plus fixes if…
This guide shows how to build a safe ESP32 smart relay (Shelly-style) for Home Assistant using ESPHome (optional MQTT). Includes correct wiring (low-voltage vs mains), relay module selection, GPIO “safe pins”, EMI/noise tips, and example ESPHome YAML for a reliable…
This guide shows how to connect a PMS5003 (PM2.5/PM10) particulate sensor to an ESP32 using UART, configure it in ESPHome, and display air-quality values in Home Assistant (optional MQTT). Includes wiring, safe GPIO choices, recommended update intervals, warm-up/duty cycling tips,…
Quick SummaryThis guide shows how to connect an INA219 or INA226 current/voltage sensor to an ESP32 over I²C, configure it in ESPHome, and monitor battery/solar voltage, current, power and energy in Home Assistant (optional MQTT). Includes wiring, address scanning, calibration…
This guide shows how to wire a DHT22/AM2302 to an ESP32, set it up in ESPHome, and get temperature + humidity into Home Assistant (with optional MQTT). It includes the correct pull-up resistor, safe GPIO choices, recommended update intervals, and…
If the ESP32-C3 was the reliable workhorse, the ESP32-C6 is what you pick in 2026 when the project touches Home Assistant, Matter, Thread, or Zigbee. Why? Because it’s one of Espressif’s first “triple-radio” parts that puts Wi-Fi 6 (2.4 GHz…
If ESP8266 was the pioneer and the original ESP32 was the heavyweight champ, ESP32-C3 is the modern workhorse: Espressif’s first big move to RISC-V, built to be an affordable, power-efficient “drop-in upgrade” class for Wi-Fi IoT — but with Bluetooth…
If you’re looking for the true modern successor to the legendary ESP8266, this is it. While the ESP32 family has expanded into multi-core, AI-friendly, Matter-ready chips, the ESP32-C2 was built for one mission: the cheapest, most power-efficient, high-volume Wi-Fi IoT.…
