Circuit Splash

ESP32 distance monitoring system using an ultrasonic sensor and WiFi to send real-time email alerts via Circuit Digest Cloud API when objects cross safety limits.

In this project, we are going to send Temperature and Humidity sensor data to Thingspeak using DHT11. By this method we can monitor our DHT11 sensor’s temperature and humidity data over internet using ThingSpeak IOT server, and we can view the logged data and graph over time on the ThingSpeak dashboard.

We can divide this arduino based thermometer project into three sections - one senses the temperature by using temperature sensor LM 35, second section converts the temperature value into a suitable numbers in Celsius scale which is done by Arduino, and last part of system displays temperature on LCD.

Send real-time WhatsApp alerts from ESP32 using WiFi and CircuitDigest Cloud. Trigger notifications from sensors without GSM modules, SIM cards, or complex hardware using the free API from CircuitDigest Cloud

Build a WiFi-based SMS alert system using Seeed Studio XIAO ESP32 and HC-SR04 sensor. Send real-time notifications via free API—no GSM module needed. Complete tutorial with code.

Learn how to send instant WhatsApp notifications from Arduino UNO R4 WiFi using an ultrasonic sensor and CircuitDigest Cloud API without GSM or SIM cards.

DHT11 is a popular temperature and humidity based digital sensor. There is an upgraded version of the DHT11 temperature and humidity sensor available, which is DHT22 Sensor with higher sensing ranges.

In this arduino based project, we are going to control DC fan speed according to the room temperature and show these parameter changes on a 16x2 LCD display. It is accomplished by the data communications between Arduino, LCD, DHT11 sensor Module and DC fan that is controlled by using PWM. PWM is a technique by using which we can control voltage.

I’ll try to show you how I turned your typical Raspberry Pi, combined with some cheap components and IP Cameras, into a state-of-the-art home monitoring system capable of recording video, turning power outlets on or off and sensing movement.