Esp8266 2 wire thermostat. Jan 2, 2017 · This can be set up pretty easily.

Esp8266 2 wire thermostat Honeywell Mercury Thermostat Furnace Physically Controlling Apr 7, 2020 · Wemos D1 Mini – although you can use any similar esp8266 board you wish DS18B20 temperature sensor – this is a really accurate sensor which allows the chaining of multiple sensors on a single data wire. Connect WeMos D1 Mini or WeMos D1 Mini ESP32 module and upload updated sketch. Then you need to solder the DS18B20 sensor pins to the base as shown in colors in the Monitor and control Daikin/Rotex (hybrid/Altherma) heat pumps via the 2-wire P1/P2 thermostat interface with an ATmega328P, ESP8266, and electronics. Looking for a thermostat wiring diagram for a 2-wire system? This article provides a comprehensive guide and diagram to help you understand and install your thermostat correctly. I also have an OpenVPN server installed on the home router (using DD-WRT), allowing easy remote access to the LAN. This is just a simple demonstration we can make more things by combining multiple sensors, broadcast reading in the world, etc. Monitor and control Daikin/Rotex (hybrid/Altherma) heat pumps via the 2-wire P1/P2 thermostat interface with an ATmega328P, ESP8266, and electronics. Find this and other ESP8266 tutorials on Newbiely. ESP32/ESP8266 Thermostat Web Server – Control Output Based on Temperature Threshold In this user guide, we will learn how to create an ESP32 and ESP8266 thermostat web server with a temperature threshold input. Feb 25, 2025 · Learn how to build a $10 Wi-Fi temperature and humidity sensor with ESPHome, Home Assistant, ESP8266, and DHT22. 5. 7k resistor, cables, and a 5V power supply. This my first hardware/embeddded software project using the ESP8266, so it's intended to expolit many features of this MCU, so I decided to make it public as it may be useful for others too. Tutorial how to build ESP8266 WiFi touch screen thermostat with Arduino Mega 2560 and TFT 3. Monitor and control your Daikin/Rotex (hybrid) heat pump and various other (Altherma) models via the 2-wire P1/P2 thermostat interface using an ATmega328P, ESP8266, and some electronics. It would be great if the thermostat could adjust to the correct mode depending on forecasted high low, current temp and some target temperatures. Daikin (hybrid) heat pump systems Dec 10, 2024 · Upgrade your thermostat game with ease! Discover how to install a smart thermostat using only two wires, even without a C-wire. The DS18B20 has a +/-0. Dec 21, 2024 · This article discusses how to interface the DS18B20 temperature sensor with an ESP32 or esp8266 microcontroller using the 1-Wire protocol, and explores the different modes of operation of the DS18B20, including the parasite mode. Contribute to quackmore/esp_thermostat development by creating an account on GitHub. ESP8266 runs at 3. Most smart thermostats need power at all times for Wi-Fi, displays, and scheduling features. A smart thermostat based on ESP8266. multiple sensor data pins connected to single GPIO pin of Arduino or any microcontroller. We used the Wi-Fi Desktop Thermostat as our ESP8266 platform. The heating/cooling system can provide more than enough power, but as you said a rectifier and step down converter is required. g. How to do it? At the very beginning, upload the Tasmota to the ESP-01S and connect to your WIFI network. Guide to find the best two wire thermostat-be it digital, programmable, wifi or smart model. com Access via logical name e. Get step-by-step instructions and expert tips for installing and configuring a 2 wire thermostat. ESP8266-12E DHT Thermostat: About a month ago I woke up to find that I had no flowing water, the pipes had frozen in my pump house. The MAX31865 supports both 2-wire, 3-wire, and 4-wire RTD configurations, making it versatile for a wide range of temperature measurement applications. - estes-sj/ESP8266-Thermostat Aug 25, 2023 · This article provides a step-by-step guide to thermostat wiring - from learning the wires' functions and removing the control panel to re-wiring any brand's device We will cover the most common thermostat wirings for 2 wire, 3 wire, 4 wire, and 5 wire thermostats. This tutorial pre assumes that you have Jan 2, 2017 · This can be set up pretty easily. Feb 11, 2021 · ESP32 OpenTherm Wi-Fi Thermostat Sketch Download sketch from DIYLESS github repository esp32-wifi-thermostat. Various Daikin systems, especially Altherma full electric and hybrid, Sky Air, and VRV systems, can be monitored and controlled via the P1/P2 2-wire room thermostat interface without any need for a cloud API. . Mar 23, 2025 · Are you tired of manually adjusting your home thermostat to maintain a comfortable temperature? With this DIY project, you can build your own Internet of Things (IoT) temperature control system using the ESP8266 microcontroller, the DS18B20 temperature sensor, and the Blynk app. heating on/off or a electric heater or fan. Note DS18B20 thermostat with logging ESP8266 thermostat with DS18B20 oneWire sensor This is a 'simple' thermostat controller, using a DS18B20 oneWire temperature sensor on a WeMos D1 Mini Pro. Sep 20, 2023 · How to find the right 2 wire thermostat for heat only systems. See full list on randomnerdtutorials. Learn how to wire a 2 wire thermostat for your heating or cooling system. Get free shipping on qualified 2-Wire Thermostats products or Buy Online Pick Up in Store today in the Heating, Venting & Cooling Department. Learn about the different terminals and their functions for a seamless installation process. At every stage, we will point out what 2 wire or 5 wire thermostats are used to wire, for example, to get a bigger picture of where those color wires go and how they enable the functions of air conditioners and furnaces. With the P1P2MQTT project (previously P1P1Serial) you can monitor and control your heat pump or A/C system - locally - from Home Assistant or via MQTT. The furnace is as simple as it gets. 3v (D/C) with a max input voltage depending on the specific board you're using. I have been powering it externally with a USB cable, but now my new house has a common wire in the thermostat wiring. http://thermostat. In this blog post, we will explore how to develop a thermostat software using the ESP8266 and MicroPython. Learn about 2 wire thermostat wiring for heat only systems. Compatibility Challenges with Smart Thermostats When you try to install a smart thermostat on a 2-wire system, compatibility can become an issue. Jun 28, 2025 · Picture this: You’re sipping cocoa in pajamas while remotely adjusting your home’s temperature because your thermostat suddenly developed a PhD in laziness. An open IoT thermostat firmware for ESP8266 and esp-open-rtos, a nice FreeRTOS implementation for this microcontoller. There are like 8 zones each controlled by a two-wire (red and white) Honeywell mercury thermostat. May 3, 2022 · Use of an ESP8266 to PWM control a 12Vdc, 2-wire computer fan, with a MOSFET (first with Tasmota, then a change to using ESPHome) Goals I wanted a simple speed control of a computer fan (or multiple fans) for temp control of a data cabinet. Home Assistant over MQTT via the P1/P2 thermostat wires, using the hard- and software of this project. Find out how to properly connect a two-wire thermostat to your heating system and control the temperature in your home efficiently. ESP8266 Heating Controller/Thermostat With Blynk Interface This is a unit to control a central heating system via 433MHz radio signals. No matter if your thermostats are from third-party brands like Honeywell, Nest, Sensi, White Rodgers or Ecobee, or the same WiFi thermostat project was created as a 1:1 clone to the Ethernet thermostat project with identical functionality. That’s the dream we’re chasing today as we build a touchscreen WiFi thermostat using ESP8266 and Arduino IDE – no soldering iron PhD required! 🔧 Hardware Ingredients List Let’s raid the digital pantry: ESP8266 NodeMCU (The Jan 7, 2024 · What is ESPHome? ESPHome is an open-source firmware that allows you to program and control electronic devices, such as a thermostat, using an ESP8266 or ESP32 microcontroller. Control of heating is via a Blynk app. this esp8266 wifi touchscreen thermostat is an example of complex sensor build by esp8266, arduino mega 2560 and tft 3. I started poking around for a “headless” thermostat and settled on ESP8266 WiFi Touch Screen Thermostat: In this tutorial we will show how to build WiFi controlled thermostat with ESP8266, Arduino and touch screen display. This project enables to monitor (and, for some systems, control) your Daikin system from e. Source code was written in the Arduino IDE. 5 °C tolerance and is perfectly stable (and even cheaper). I’d been thinking I would just use a ZWave or Zigbee option, however I also wanted to install a wall-mounted tablet for Home Assistant and the best place to put it was where the Nest was currently mounted. Temperature measurement will be the HTTP server on ESP8266 12e V3. ESP8266 and Multiple Temperature Sensors DS18b20 With HTTP Server: I will show you how to make a remote temperature reading. I think it’s time to publish it. Detailed instructions you can find in ESP32 Wi-Fi OpenTherm Thermostat post of diyless. For monitoring it is Jan 14, 2020 · In this tutorial we use ESPHome to configure and connect an ESP8266-based device to Home Assistant running on a Raspberry Pi 3. This article details how to connect your thermostat with ESPHome from start to finish. Features wiring diagram for PCB and a self-hosted webserver with HTTP authentication, ability to change thermostat settings, view data on google charts, and run an NTP client. The YAML file to configure ESPHome for use with the desktop thermostat can be downloaded below. 2" apart, a perfect fit for every other hole on 0. 2 May 30, 2023 · Introduction In this tutorial, we are going to make a simple “Temperature Sensor Web Server with ESP8266 ESP01 & DS18B20”. Previously, I had fans just switching on and off, and they were pretty noisy and gave little control of temp. Jun 23, 2017 · in this tutorial, we will show how to build a wifi touchscreen thermostat. I was able to make my own extra long and beefy pin headers with 8ga solid core wire Status: It's been on my wall since early September of 2022, so about three ESP8266 Modbus Thermostat With Touch: I will show you in this instructable how to make a good-looking touch-screen thermostatwith optional Modbus support via RS485 with ArduiTouch ESP and an ESP8266 (NodeMCU or Wemos D1 Mini). Nov 29, 2024 · You can have 2 Wire thermostat that that only control heating all the way to 8-wire and beyond that control, heating, cooling, fan, reversing valve, emergency heat, second stage or even third stage heating or cooling etc. For Aug 22, 2025 · Are you ready to take control of your home's comfort? Wiring a two-wire thermostat might sound daunting, but it's simpler than you think. Our step-by-step guide will help you install your thermostat quickly and easily. 1" protoboard. Jan 9, 2024 · You will need a relay module (ESP01-S+Relay) and a BS18B20 temperature probe, as well as a 4. For this reason, ESP8266 and ESP32 do not use advanced web server implementations Aug 20, 2025 · Because 2-wire HVAC systems lack extra wires, they do not support some advanced thermostat features without extra steps. It simplifies the process of interfacing RTDs with microcontrollers by providing a high-accuracy, digital output via SPI (Serial Peripheral Interface) communication. From compatibility checks to troubleshooting tips, this article guides you through the process for a seamless and cost-effective setup. The repository contains a board diagram, BOM and Gerber file for self-assembly, but it is also compatible with boards from Ihor Melnik Most heating/cooling thermostat wiring is 24v (A/C). It's been a cold winter. You should double check what yours is with a multimeter. The tutorial provides step-by-step instructions on connecting the sens Daikin (hybrid) heat pump systems are usually controlled by a room thermostat (and/or other controller) over a 2-wire HBS interface, called P1/P2, which combines data and power. ESP8266 displays readings of Temperature in Celsius & Fahrenheit on a web page from DS18B20 Sensor. The P1P2Serial library and P1P2Monitor program perform low-level bus operation, the P1P2-bridge-esp8266 program interprets data from/to MQTT supporting Home Assistant MQTT discovery. You must, of course, replace the dummy SSID and passphrase by the values needed for your own network. Oct 16, 2022 · Overview ⌗ I’ve been planning to replace my Nest thermostat with a local-only option since moving into my house. Feb 7, 2021 · 1-Wire Connection interface Every DS18B20 temperature sensor is manufactured with an unique 64 bit serial code which makes them easy to differentiate them when connected through single 1-wire bus i. No idea how to do that with HA yet. When combined with the powerful ESP32 microcontroller or esp8266, connecting multiple DS18B20 sensors in a single circuit and even over long distances becomes possible. Get ready to enjoy the convenience and energy savings of a smart home! ESP32 Wi-Fi OpenTherm Thermostat sketch allows you to build simple OpenTherm Wi-Fi thermostat using ESP32 module and ESP32/ESP8266 Thermostat Shield. Sep 5, 2022 · The thermostat includes an air quality monitor that measures temperature, carbon dioxide levels and air humidity. e. Jan 27, 2025 · The Dallas DS18B20 temperature sensor is a versatile and widely used device for measuring temperature in various applications. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP8266. The DIYLESS ESP32/ESP8266 Thermostat Shield is a low-cost and easy-to-use device that allows you to build your own OpenTherm-compatible thermostat. com. Oct 16, 2025 · A thermostat is a device that controls temperature by switching heating or cooling systems on and off. Consequentially… Using an ESP32 or ESP8266 to create a smart thermostat/timer that measures room temperature and switches e. You will be able to connect multiple temperature sensors DS18B20. Sep 22, 2023 · Once upon a time I started developing a simple Opentherm controller on esp8266 for personal use, which resulted in a full-fledged controller product for Home Assistant. Contribute to tomh05/esp8266-thermostat development by creating an account on GitHub. The little temperature controlled power block in my pump house had failed, tripping the circuit breaker. Paste your auth token, specify WI-FI SSID, WI-FI password and update pins configuration according to which module you want to use ESP8266 or ESP32. a weekly programmable thermostat based on ESP8266. Learn how to wire a 2 wire thermostat and control the temperature in your home efficiently. All variables can be changed via the Web Mar 10, 2025 · Today we will make a Temperature Control with ESP8266, DS18B20 Sensor, OLED Display & AsyncWebServer to control heating & Cooling remotely. Dec 23, 2020 · Home automation doesn't have to be overly complicated. Nov 29, 2022 · The thermostat I'm replacing clearly indicated the pinout on the back, saving lots of time. Thermostat will also show other info, like weather forecast and temperature outside. The thermostat is equipped with a real time clock with clock synchronization with an exact time server via the Internet. 2" LCD. Jun 23, 2025 · This complete 24-volt thermostat wiring guide covers all thermostat wiring issues from the simple to the complex – from basic 2 wire thermostat wiring common to gas furnaces all the way to 8 wire thermostat wiring for two stage heat pumps and similar HVAC systems. An ESP8266 temperature controlled relay with self-hosted webpage dashboard. com blog. The thermostat is controlled from the interface of the Blynk mobile application on a smartphone. Learn: How to control temperature using ESP8266, fan and DS18B20 temperature sensor. 1 of ESP8266 Arduino Core until the issues are fixed with the latest. Jan 8, 2022 · WiFi thermostat project was created as a 1:1 clone to the Ethernet thermostat project with identical functionality. It is best to immediately assign a static IP address to the device. Daikin P1/P2 Daikin (hybrid) heat pump systems are usually controlled by a room thermostat (and/or other controller) over a 2-wire HBS interface, called P1/P2, which combines data and power. local/ For ESP8266 it requires ESPAsyncTCP to use this library you will need version 2. The software is free, it develops as I have free time. It uses the popular IoT microcontrollers ESP8266 and ESP32 from Espressif Systems, which cover the operation of the WiFi thermostat and bring a number of options to extend the original concept. Mar 18, 2019 · The necessary code and documenation is now available under GitHub - Arnold-n/P1P2Serial: Monitor and control Daikin/Rotex (hybrid/Altherma) heat pumps via the 2-wire P1/P2 thermostat interface with an ATmega328P, ESP8266, and electronics. Is it okay to power my esp8266 thermostat from the thermostat wires? Hello, I have a thermostat I made based on an esp8266 and a few relays. The existing pins were 0. Full wiring, YAML config, automations, and troubleshooting. gouha eftqci adzv gnu woqz vjdraf ekc hxku dwxml zejfav zlaj ttnb uebssyr nmi aqin