Cheap power monitor (STC013) with Home Assistant Discover and Wemos D1 Mini / PRO (esp8266)

An Arduino sketch to connect an INA-219 module to an ESP dev board and measure Voltage, Current, Power, Energy Consumption and Costs via the Blynk mobile app.

🚗🔋🔌 C# NissanConnect library and ESP8266 code powering a Nextion HMI display used to monitor and control a Nissan Leaf remotely.

Water level monitor using open-source microcontrollers (Arduino, ESP8266, ESP32) and ultrasonic sensors HC-SR04 / JSN-SR04T / or TOF laser sensors VL53L1X / VL53L0X. Arduino Core & ESP-IDF implementations. For ESP32 available also with FreeRTOS. ESP8266 and ESP32 support for Ultra Low Power deep sleep app. ESP32 available with PHY Ethernet LAN8720

SmartConnect is a smart home automation system that utilizes Altium, ESP8266, Pzem004T, Flutter app, and Firebase backend. The system monitors and controls electrical devices in the home, providing real-time power consumption monitoring and alerts for abnormal power usage

Full-stack health monitoring appliction with real-time sensor data (Arduino/ESP8266), activity/nutrition tracking, and RAG-powered health insights (Langchain). Features multimodal AI assistants using Gemini & OpenAI.

Code to monitor the power consumption of embedded devices

DIY Power Monitor project using PZEM-004T module and ESP-12F

The portable E-nose is a low cost battery powered device that uses gas sensor and ESP8266 to monitor air quality. It wirelessly transmits data to blynk app.

The portable E-nose is a low cost battery powered device that uses gas sensor and ESP8266 to monitor air quality. It wirelessly transmits data to blynk app.

Integration of the Efergy Power Monitors with the MQTT Protocol and ESP8266

WattWhisper is an AI-enabled IoT smart outlet using ESP8266 and INA219 to monitor real-time power usage, identify appliances through current signature analysis, and provide automatic overload protection. It integrates cloud-based AI and Blynk for safe, efficient, and remote energy management.

Simple wifi-enabled current sensor to send email messages about power use

基于FreeRTOS的智能手表，集成抬腕显示、心率血氧监测、GPS定位及步数统计。多任务调度与队列通信优化效率，任务优先级管理实现功能切换，结合传感器采集数据，利用ESP8266远程同步，打造低功耗方案。 /FreeRTOS-based smartwatch with wrist-lift, HR/BloodO2 monitoring, GPS, step counting. Multi-tasking/queues boost efficiency. Task priority switching. Collects sensor data, syncs via ESP8266. Low-power solution.

Simple power consumption monitoring using an ESP8266 and a DIN power meter with an open collector output

Power monitor based on ESP8266 and current sensor SCT013

The MAID - Energy Monitor is an energy monitor based on a ESP8266 board that uses the XTM18S (or compatible) single phase energy meter to get energy readings. The energy monitor is MQTT enabled and sends readings for power (W), consumption (kWh) and accumulated consumption (kWh), and with a couple tricks you can also get apparent power (kVA) and current (A).

Broadcasts the current state of an ESP8266 and DS18b20 temperature monitor, using deep sleep mode to keep current draw to a minimum - ideal for battery powered projects.

Local-first smart home companion for real-world power outages. Combines a React Native mobile app with ESP8266 NodeMCU + OLED modules to monitor indoor climate and track whether the bathroom light is still on — tailored to power supply realities in Ukraine, especially Chernihiv.

ESP8266 based CT Clamp sensor for monitoring washing machine power usage and reporting into HomeAssistant

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ESP8266 Power Monitor with INA226

TWIN NODE is an ultra-low power, ESP-12F (ESP8266) based wireless water level monitoring node using a waterproof ultrasonic sensor. Designed for battery + solar operation with deep-sleep and ESP-NOW communication, it features a compact PCB optimized for low power and easy prototyping.

A plant moisture & environment monitor powered by an ESP8266 and MQTT

Rule your WiFi! This ESP8266 manager ditches boring configs—scan, connect, and monitor networks from a slick web UI. Auto-reconnect, multi-network memory, real stats, and AP fallback. No more serial headaches. Just power up and take control. For makers, rebels, and tinkerers.

A smart irrigation system is built to monitor the field environment and to control the water pump remotely from anywhere in the world. This project was built using NodeMCU ESP8266, Soil moisture sensor, DHT11 sensor, and power relay module. It uses a relay module to ON/OFF the pump. This project is designed with Blink cloud.

Power Monitoring based on ESP8266

The BlynkIoT DC Multimeter is an innovative and versatile energy monitoring solution built around the ESP8266 board and the Blynk IoT platform. This project aims to provide users with real-time measurements of essential electrical parameters, making it easy to monitor and manage DC circuits' power consumption effectively.

IoT-based Fire Detection & Suppression System using ESP8266. Monitors temperature, smoke, and vibration, tracks GPS location, displays status on LCD, sends data to cloud, and activates FM-200 suppression via relay. Powered by 12V battery & wind turbine for continuous operation.

Components used Node MCU (Lolin) DHT 11 LDR Relay 6V Resistance 330 Ohms Transistor BC 547 L.E.D. D.C. Jack Diode IN 4007 General PCB Board Wires Adaptor 5V 2 Amps Relay ConnectorIntroduction:- This is IoT based home automation project is done using low cost NodeMCU module, It uses relays and few simple components, four electrical devices can be controlled, Temperature and Humidity can be monitored. NodeMCU is low cost module is used here. The electrical devices can be controlled by the help of Google assistance and by the blynk android app. In contrast, Wireless system can be of great help for automation systems. With the advancement of wireless technologies such as Wi-Fi, Cloud networks in the recent past, Wireless systems are used every day and every where. FUNCTIONS OF BASIC COMPONENTS USED: NODE MCU: NodeMCU is an open source development board and firmware based in the widely used ESP8266 -12E Wi-Fi module With its USB-TTL ,the nodeMCU board supports directly flashing from USB port. It combines features of WIFI accesspoint and station + microcontroller. These features   make the NodeMCU extremly powerful tool for Wi-Fi networking. It can be used as accesspoint and/or station, host a webserver or connect to internet to fetch or upload data.-In our project pins D1,D2,D7 and D8 are used to automate two lights and two fans respectively.Pin A0 is connected to LDR.D6 is connected to DHT11 DHT11:It is a sensor which is used to sense temperature and humidity of a particular area. LDR:It is a Light Dependent Resistor used to sense the intensity of light.Here we are using a LDR which has a maximum value of 1024. Relay: A relay is an electrally operated switch. Many relays use an Electromagnet to mechanically operate a switch. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal.In our project we have used 6volt relays to control two lights and two fans respectively. Transistor: A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.In our project we have used transistor BC547 whose base is connected to node mcu ,emitter to ground and collector to Relay. LED:In our project we have used Two LED’s one Red and one Yellow.When the circuit is on Red light glows and when we there is a online connection established between the server and circuit yellow led glows. DC JACK: A DC connector (or DC plug, for one common type of connector) is an electrical connector for supplying direct current(DC) power. Diode: Main functions. The most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking it in the opposite direction (the reverse direction).In our circuit the positive pin of diodes are connected to Relay. General PCB Board:In our circuit we have used PCB instead of Breadboard and we have soldered each and every connection to make the connections tight and Errorfree.It also makes it easier to carry. Adaptor:An adaptor is used to connect to switch boards so that it can work on fans and lights directly. Relay Connector:It is used to connect Relays Future Scope:- Future scope for the home automation systems involves making homes even smarter. Homes can be interfaced with the sensors including light sensor, Temperature & Humidity Sensors and provide automated toggling of devices based on conditions. More energy can be conserved by insuring occupation of the house before turning on devices and checking Brightness and turning off light if not necessary. The system can be integrated Closely with home security solutions to allow greater control & safety for home owners. The next step can be to extend this system to automate a large scale environment, Such as offices and factories. Home automation offers a global standard for interoperable Products. Standardization enables smart homes that can control appliances, lightings, Environment, energy management and security as well as the expandability to connect with Other networks. References: - Introducing NodeMCU Arduino 1.8.9 Digital and Analog sensors Blynk Android APP Google Assistance