Guides and articles

Technical · 4 min read Choosing and calibrating a soil moisture sensor for Arduino and ESP32 Why cheap resistive soil probes corrode, why capacitive ones last, how to calibrate a probe in two minutes, and the ESP32 analog pin trap that catches many beginners. Technical · 5 min read How sensors send data: Wi-Fi, MQTT, LoRaWAN, Bluetooth and more compared A plain comparison of the main ways a sensor gets its readings to the internet, with range, power use and the situations where each one fits best. Technical · 3 min read HTTP or MQTT for sensor data: which should you use? A practical comparison of plain web requests and MQTT for sending readings, with clear rules for choosing between them and the cases where either works. Technical · 4 min read Send ESP32 or Arduino sensor data to a website with HTTP A complete, working sketch that reads a sensor on an ESP32, sends the value to an online dashboard every five minutes, and keeps running after a Wi-Fi drop. Includes a deep sleep version and ESP8266 notes. Technical · 3 min read Send MQTT sensor data to an online dashboard A short Python script that listens to your MQTT broker and forwards the readings to SensorConsole, so devices that already speak MQTT get a remote dashboard and permanent history. Technical · 4 min read What is MQTT? A plain explanation for sensor projects How MQTT works, what a broker and a topic are, what the three quality levels mean, and when it is a better choice than a plain web request. Technical · 4 min read Why so many people build sensor projects with Arduino What makes Arduino the default starting point for sensor projects, where the classic boards run out of room, and what to move to when your project needs the internet.