Arduino hvac monitor. Code Introduction: Arduino Air Conditioning Model.

Arduino hvac monitor PMS5003 is connected to Arduino as pin1 of sensor to 5V supply from Arduino and pin2(GND) to GND, Pin 4(RX) of sensor to Tx of Arduino and Pin5(TX) of sensor to RX of Arduino. Arduino Uno Rev 3. Control of the HVAC of a car (or other vehicle) via Nextion touch and Arduino UNO. The parameters which mostly responsible for making air harmful is the level of CO2, OZONE and the humidity present in the air so to monitor that we use MG811 (CO2), MQ131 (OZONE)and for humidity DHT22. io. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get The Arduino thermostat has lots of room for improvement, here are a few things that I can think of Add a motion sensor to turn ON and OFF the unit based on presence. and humid. Find this and other Arduino tutorials on Another possibility would be to hook up a 24 VAC SPST relay in parallel with the output you want to monitor, then use the contacts of that relay to switch an input on the Arduino to ground (activate the internal pull-up first). Here you can find the latest firmwares, and a link to installation instructions. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. Star 77. MH-Z19b NDIR CO 2 Sensor with Arduino– In this article, you will learn about the MH-Z19B NDIR sensor and how to use it with Arduino and display the corresponding readings on the OLED display module. 8” nextion touch display. Soldering iron (generic) Project description. The Blowhard - HVAC Circulation Blower Assist Monitoring. 5, and PM10. DS1838 Infrared Receiver . Moreover, a Cloud-based platform that manages data coming from air quality sensors is developed. the system also has a calibrated differential pressure switch across my fair filter and will alert me if the differential pressure gets to the point where the filter Before you start uploading a code, download and unzip the following libraries at /Progam Files(x86)/Arduino/Libraries (default), in order to use the sensor with the Arduino board. 3V and GND from Arduino to VIN and GND of BME 280 respectively. HVAC (Heating, Ventilation, Air Similarly copy the codes for all different level of temperature. The advantages of using a second Arduino are: (1) I don't Control of the HVAC of a car (or other vehicle) via Nextion touch and Arduino UNO. ePaper display (1. In this code we Dec 30, 2023 · Arduino Air Quality Monitoring System Circuit Diagram. PMS5003 is a kind of digital and universal particle concentration sensor, which can be used to obtain the number of suspended particles IV Drip Fluid-Level Monitoring - Arduino Portenta H7. 4 both running on windows 10 PC. The Arduino is used since the software is in non-volatile storage so not typically subject to corruption. \r\n\r\n. Required fields are marked * Name * Email * The heart of the project is Arduino uno combination with 2. Components and supplies. OpenTherm protocol requires simple low voltage twowire connection to boiler, but voltage levels (7. By NoahM66 Follow. Smart HVAC System with an Arduino Nicla Vision. I'm the kind of Aug 1, 2023 · Request PDF | IMPLEMENTASI SISTEM MONITORING DAN KONTROL AIR CONDITIONER MENGGUNAKAN INTERNET OF THINGS | Air conditioner merupakan perangkat elektronik untuk mengatur suhu suatu ruangan yang Aug 18, 2022 · For this build, you’ll need the Arduino Uno, Arduino Upload Cable, a breadboard, ESP8266 Wi-Fi chip, Wi-Fi Adaptor, MQ-135 gas sensor, and Male to Male cables, and a small prying tool, such as a Swiss army knife. The Helium Ethernet Element is used since this is a I used an Arduino MKR Wifi 1010 and a MPX5010 pressure sensor to read the ambient air pressure in the condensation drain line. Learning Hardware Community. The 2. Therefore, it can be a bit cold in the winter and hot during the summer months. monitor(); // service the control loop of Important note: Make sure to use proper precautionary measures when dealing with mains power as it could be extremely dangerous. h; Code. That is, you do not need to add anything to your configuration for the devices for them to be added. Unfortunately we experience power outages fairly often due to weather events and also have momentary brief outages lasting only a few seconds to a minute or so. We can send commands on the computer, point the air conditioner remote at the infrared transceiver module, press the button, and the infrared transceiver module will print the infrared information Dec 12, 2023 · Overview. You can see the Example: Building a portable weather monitoring station using an Arduino and the DHT11 sensor. The multi-gas sensor system is highly flexible with its plug-and-play feature and adjustable structure, enabling users to easily select the desired gas The devices controlled in this system are the LED (on-off automatically and setting the intensity of light), air conditioning (on-off automatically, temperature settings), a projector (on-off Nicla Sense Env fits perfectly into HVAC systems, helping you monitor air quality, humidity, and temperature to keep smart buildings comfortable and compliant with environmental regulations. The parameters which mostly responsible for making air harmful is the level of CO2,OZONE and the humidity present in the air so to monitor that we use MG811 (CO2), MQ131 (OZONE)and for humidity DHT22. Arduino Nicla Vision. OpenMV is a MicroPython-based firmware for machine vision and learning. The serial monitor outputs the temperature, pressure, humidity and wind speed info (there are many more features listed in the API doc). All dependencies on the Arduino framework have been removed. 1 #include < AFMotor. Agricultural Monitoring Systems: I leveraged that experience to develop the Arduino code and the MIT App Inventor sketch for this project. These have been installed in the HVAC units, and send a A small-scale HVAC system utilizing a closed-loop feedback PID controller that can maintain a set-point temperature within the box. This integration will automatically add all available devices to Home Assistant, after presentation is done. Your email address will not be published. h > 3 #include "Adafruit_MCP9808. e. One of the reasons that caused it, is our daily energy waste. To control the fluid it is required a PID implementation in the A single Arduino and Helium Atom at a air handler can monitor inflow and outflow sensors. 15V) still much higher than Arduino/ESP8266 levels, which requires OpenTherm Adapter . The actual cost of the filter performance monitoring could be reduced if Arduino is replaced with ESP32 and a customized printed circuit board is designed for ESP32 and BME680. Programming Arduino application The Arduino ecosystem is wonderful for this kind of explorative prototyping. Jun 3, 2024 · Rate-of-Rise triggered axial fan blowers to improve warm air circulation in a room with one HVAC inlet vent. 8” nextion display provides a decent user interface to Jun 22, 2021 · Lesson7- Arduino control TV and air conditioner by infrared (IR) You are here: Lesson29- Tasmota for KC868-A8 by PCF8574 relay and monitor sensor 11/18/2021. The Arduino Controlled Relay Box instructable has steps and some tips and tricks. It can also log the data to an SD card for further analysis or transmit it wirelessly to a computer for real-time monitoring. Then, we can monitor the serial port using a serial port tool on the computer. h, and changing the This paper presents Polluino, a system for monitoring the air pollution via Arduino. Oil Tank Measurement Using Computer Vision - Sony Spresense. h > 2 #include < Wire. Control any (condensing) boiler or air conditioner (HVAC) that also meets the OpenTherm specification. Add a single module to combine three state-of-the-art sensors from Renesas® with the simplicity of integration and scalability of the Arduino ecosystem: an ultra-low power temperature and humidity sensor, and two smart and industrial-grade gas sensors, to evaluate air quality pengontrolan, Arduino terhubung dengan sistem Internet of Things yang akan disambungkan dengan modul wifi yang akan membuat Arduino tersambung dengan internet. An Arduino with a single set of sensors and Helium Atom can be used for ambient monitoring. Although it’s fun to see the key values in the Serial Monitor or on an LCD display, you will probably want to use the remote for something more useful, i. Arduino PC Monitor. The results show that 57% of the indoor air quality monitoring systems are based on Arduino, 53% of the systems use Internet of Things, The new-age healthcare systems incorporate advanced technologies to monitor human health, physiological status, HVAC systems play a major role in the total building energy consumption, 13. iot arduino esp32 home-assistant hvac iot-device heatpump infrared-control esp32-arduino hvac-control. Code. The serial monitor outputs the temperature, pressure With the Air Conditioner IR Remote running out of battery in the middle of the night without spare batteries on hand, the Arduino Nano on my desk made me. HVAC Systems: Monitor air quality, temperature, and humidity for optimal environmental control; Air Purifiers: Enable real-time detection of harmful gasses for better air quality and energy-efficient system adjustments; Safety Systems: Detect fumes, smoke, and other hazards early to trigger warnings both indoors and outdoors Audio Projects; Wearable Cough Sensor and Monitoring - Arduino Nano 33 BLE Sense. The Arduino_GigaDisplay_GFX library is a layer library for the Adafruit_GFX graphic core library. Code Introduction: Arduino Air Conditioning Model. We will make a simple Arduino Code and measure the dust particle concentration in the air with size and quantity for PM1. Article. AI-Assisted Monitoring of Dairy Manufacturing Conditions - Seeed XIAO ESP32C3; AI-Assisted Air Quality Monitoring - DFRobot Firebeetle ESP32; Smart HVAC System with an Arduino Nicla Vision. Library can be easily installed into Arduino IDE and compiled for Arduino, ESP8266/ESP32 and other similar controllers. . Tools and machines. The DIN pin of the TFT LCD module which is data-in is connected with the TX pin of the db9, the DOUT pin Request PDF | IMPLEMENTASI SISTEM MONITORING DAN KONTROL AIR CONDITIONER MENGGUNAKAN INTERNET OF THINGS | Air conditioner merupakan perangkat elektronik untuk mengatur suhu suatu ruangan yang An electric furnace-air handler, arduino-based, controller. The heart of the project is Arduino uno combination with 2. 0, PM2. 3. In this step, we need to connect the infrared transceiver module to the computer via a USB to the TTL module. The Arduino thermostat has lots of room for improvement, here are a few things that I can think of Add a motion sensor to turn ON and OFF the unit based on presence. Finally worked out that in 2. Include external sensors to capture the I'm trying to decide if want to have my current Arduino (the HVAC monitor) talk directly to the XTB-IIR, or have it talk to a second Arduino (by setting a pin high or low - using an opto-isolator would be smart), and then have the second one send the appropriate commands to the XTB-IIR. Generic 7. Simple Thermostat Using Arduino: This instructable will cover how to make a simple thermostat using an arduino, and other electronic parts! Before starting this project I had very little experience with an arduino. Delivered Package Detection - ESP-EYE. This library makes it easy to draw geometrical Expand your Portenta or MKR projects with Nicla Sense Env, and start sensing the world around you. We will use Wifi. 1. In a similar vein to the first project, the medical center network Santagostino developed its own monitoring system using an Arduino Nano RP2040 Connect, aimed at tracking the performance of their Rate-of-Rise triggered axial fan blowers to improve warm air circulation in a room with one HVAC inlet vent The Blowhard - HVAC Circulation Blower Assist Jun 3, 2024 Arduino Air Quality Monitoring System Circuit Diagram. Use a computer vision model to determine occupancy in rooms and adapt HVAC zone output accordingly. The software includes a Monitor tool which replace the Arduino IDE monitor and avoid serial conflict. The term “NDIR” stands for Non-Dispersive Infrared which uses specific light wavelengths to calculate the amount within the air. I am wanting to setup a microprocessor to monitor the incoming AC line voltage and record a date/time stamp that Jan 7, 2025 · IV Drip Fluid-Level Monitoring - Arduino Portenta H7. In that way, the total cost could be below 120 USD. Based on this data, the Nano dynamically adjusts the power intensity of a 5V DC fan in that respective area to optimize the temperature while Monitor and data logger setup: I used the breadboard holder base plate to mount an Arduino MEGA 2560 with the Adafruit TFT shield on it . The usability of the software is also good, I prefer it as Visual Studio (they are similar for the Interface dvp tool) much simple, but what I really need. I plan to run a separate wire (cat5) from the thermostat to my project so I Controlling Air Conditioner temperature automatically with ESP32 after reading real-time weather dat. There were also some lessons learned from the previous projects, like developing the code in PlatformIO (as opposed to the Arduino IDE, otherwise you have memory issues), changing the work buffer size in BoschSensorTec. It seems that you monitored air flow in your application, whereas I'm monitoring pressure drop directly. The library can be easily installed in the Arduino IDE. In this project, I am measuring AC voltages coming from mains power line and the AC current drawn by the load and then calculating Apparent Power(RMS) and the Power Factor. Arduino Sensor Kit - Bundle. Santagostino set about finding a monitoring solution that was modular, scalable, operated remotely and was adaptable enough to suit whatever HVAC system was in place. Updated May 23, 2024; C++; DannyDeGaspari / Samsung-HVAC-buscontrol. Automatic FOMO-based people counting using computer vision to increase elevator safety. arduino nest hvac ir Updated Apr 12, 2018; C++; home-climate-control / hcc-esp32 Star 7. arduino. DHT. Did not have to do this in 1. A single Arduino and Helium Atom at a air handler can monitor I'm trying to decide if want to have my current Arduino (the HVAC monitor) talk directly to the XTB-IIR, or have it talk to a second Arduino (by setting a pin high or low - using an opto-isolator would be smart), and then have the second one send the appropriate commands to the XTB-IIR. 4. The unit requires the CN105 // send an init data packet ac. 28 March 2021; Leave a Reply Cancel Reply. Connecting DHT11 to Arduino with serial monitor. h" 4 5 Adafruit_MCP9808 tempsensor = Adafruit_MCP9808 (); Monitor and control Daikin/Rotex (hybrid/Altherma) heat pumps via the 2-wire P1/P2 thermostat interface with an ATmega328P, ESP8266, and electronics. May 14, 2021 · Come in this project and you will learn about Interfacing Temp. The station can measure temperature and humidity outdoors and display the data on an LCD screen. I haven't really dabbled with DIY electronics for 20 years; when I was a kid I had one of those 200-in-1 radio shack kits and managed to do pretty well with it. Use a computer vision An Arduino processor to collect data from the sensors over I2C. Then connected BME 280 with 3. I'd come across that PDF myself while researching. An exploration into using machine learning to better monitor a patient coughing, to improve medical outcomes. Here is a simple step-by-step guide on “How to Add Libraries in Arduino IDE“. 1 inch TFT LCD Module and Arduino is powered up using a 12v adaptor or battery. In my home, OpenTherm is used in the communication between the room thermostat and the heater. It can be used as a debugging tool, testing out concepts or to communicate directly with the Arduino board. The last step involved building an Arduino library containing the model and integrating it into a sketch that communicates with an Arduino Nano peripheral board over I2C by relaying the number of people per quadrant. The project is for remote monitoring of temperature and air conditioner compressor status for a HVAC system. Head over to Arduino IDE, open a new file and save it before moving on. The advantages of using a second Arduino are: (1) I don't The project is for remote monitoring of temperature and air conditioner compressor status for a HVAC system. OpenMV Firmware & IDE. It has been tested on an ESP32-S2, ESP32-C3, ESP32 NodeMCU and an ESP8266 NodeMCU microcontroller and may also work on other MCU's. 13 to 2. You don't need to worry about calibration; the process is fully automated by the library. Find this and other hardware projects on Hackster. This provides for much better control of the code and better integration with the upcoming Matter implementation. People consume electricity in order to use home/work appliances and devices and also reach certain levels of comfort while working or being at home. The temperature sensor collects the temperature data and feeds it to the server through the Esp8266 wifi module connected to the Arduino. The library complies with the OpenTherm specification. ) next i have my HVAC monitor. Include an OLED screen to monitor the temperature. Lesson27- how to use web service http command via ESPHome with KC868 A8 Mar 24, 2023 · Howdy, I live in a remote rural area of the Ozark Mountains here in north central Arkansas. You can check all the Air Conditioner Remote control IR codes in the Arduino Code given at the end of this tutorial. Took me a while to work out why I was having uploading issues in 2. Hardware; 12 13 namespace Arduino_Controll 14 {15 public partial class Form1: Form 16 {17 static string data; 18 Computer c = new Computer Our three new imports are Wifi, HTTPclient and Arduino_Json. In air purifiers, it provides real-time data that allow for energy-efficient operation and better air quality by detecting harmful gasses and adjusting the I'm working on a home environmental/energy monitoring system. I'll show you, how to monitor some hardware variables. Temperature Monitoring with Arduino IoT Cloud using DHT22. Object Counting for Smart Industries - Raspberry Pi. Read more In this tutorial, we learn how to interface PMS5003 PM2. Projects - All actions are timer-based, monitoring continuously run, and multiple processes can be concomitant - Parameters evaluation (thermistor voltage to temperature conversion, and measured The last step involved building an Arduino library containing the model and integrating it into a sketch that communicates with an Arduino Nano peripheral board over I2C by relaying the number of people per quadrant. Main Arduino Program: The complete main Arduino program can be found at the bottom of this page, but you cannot use the same program. h to connect ESP32 with wifi network and HTTPClient. The Arduino IDE 2 has the Learn: how LCD I2C works, how to connect LCD 20x4 to Arduino, how to program Arduino step by step. Predictive Maintenance Solutions with Arduino. The doc is ok, there is a complete example for both type of operation (read and write). So that the HVAC I figure it would be best to monitor the “Heat” or “Cool” control leads via opto-isolators. 8. Option 1: GFX Library. 13. My plan is to use mostly 1-wire network for data gathering. Interfacing Arduino Joystick Shield with OLED Display. 5 Air Quality Sensor with Arduino. Solder parts on the Beefcake Relay PCB except for the output terminals (the PCB is labelled). Add an AUTO mode. in Ceramic Firing Temperature Trajectory Monitoring System on IoT-Based Gas Furnace: English. then SCL pin to A5 and SDA pin to A4 pin of Arduino . Include external sensors to capture the temperature of the room at different locations. However, even though the environmental impact of this behavior is not MikroE Arduino UNO click shield adapter board: 1: MIKROE-1978: 1471-1487-ND: 1471-MIKROE-4290-ND: MikroE HVAC Click sensor board (includes external SPS30 sensor module) Assembly Instructions The Air Quality Monitor Arduino Poonam Pal1, Ritik Gupta2, In order to monitor quality of air-based system is purposed. Previous Counting Eggs with Computer Vision - OpenMV OpenTherm (TM) is a proprietary protocol used for information and command exchange between HVAC (heating, ventilating, and air conditioning) equipment. Finally, we use some simple An Arduino compatible library was built and used to perform continuous interference on an Arduino Nano 33 BLE Sense audio input. To solve this problem, I used an Arduino to monitor the room temperature and tur Arduino has developed MicroPython support for the boards listed below. Now copy the following code and upload it to Arduino IDE Software. More by the author: As part of a demonstration of our team's ability to create a model of a smart train device for marketing purposes, the objective was to create a system in which a temperature sensor reads data from the circuit and converts the information into a temperature This project aims to calculate PPM (Parts Per Million) using 15 different gas sensors, each with individually created slopes. The compressors are connected to the Arduino through the step down transformer AC to DC converter. 8” nextion display provides a decent user interface to monitor the air This Arduino sketch utilizes an ESP8266 microcontroller to read temperature, humidity, and soil moisture values using DHT11 and a soil moisture sensor. In a class I was taking, Monitor and control Daikin/Rotex (hybrid/Altherma) heat pumps via the 2-wire P1/P2 thermostat interface with an ATmega328P, 🌡 An Arduino interface between Nest's HVAC signals and an IR-controlled heat pump. Full Jun 4, 2014 · Hello everyone! Today I purchased my first Arduino components. Lesson28-How to use KC868-A4 (ESP32) DAC output DC 0 10V by ESPHome 11/17/2021. The interface of display with bread board and Arduino hardware can be seen. 2 Case Study 2: Teaching Building HVAC Monitoring System during COVID-19. DHT11 Temperature/Humidity module. To use the GIGA Display Shield, there are currently three supported alternatives to draw on the display. Arduino Heating or Cooling Control - SHProject 5: My daughter's bedroom is situated at the opposite end of the house from the HVAC system. From this, I was able to infer the fan speed and thus stage of the system. The breadboard holds the RF95 breakout along with the AH20 module, the RTC, and a traffic light led display so I The Serial Monitor is an essential tool when creating projects with Arduino. The Arduino microcontroller controls an electronic circuit that can sense the environment using a sensor (electronic components that convert real-world measu MH-Z19b NDIR Sensor:. Is there a config setting in 2. 4 somewhere  · iot arduino esp32 home-assistant hvac iot-device heatpump infrared-control esp32-arduino hvac-control Updated May 23, 2024; C++; Jeroen88 faisalthaheem / machine-learnt-air-conditioning Star 14. We adopt the code from IRremoteESP8266 library’s example code for receiving data with IR receiver. c_cpp. I build an application that sits between the heater and thermostat, non-intrusively, and listens in on that Climate change has become a major problem for humanity in the last two decades. Bean Leaf Disease Classification - Sony Spresense. Look up how much current your A/C draws. Full-text available. Worker PPE Safety Monitoring - Nvidia Jetson Nano. Based on this data, the Nano dynamically adjusts the power intensity of a 5V DC fan in that respective area to optimize the temperature while May 18, 2018 · Arduino is good at monitoring environmental conditions, HVAC Zoning With Arduino to Improve Cooling Control: Control an HVAC register with a servo to improve room comfort throughout the day Like most US homes, our Mar 17, 2020 · OFF. Platfrom IoT yang akan digunakan untuk menampilkan monitoring dan sistem on – off AC pada website adalah thingspeak. Code home-automation mqtt iot monitor digital hardware esp32 wifi esp-idf hvac sensor-network 1-wire iot-device climate-control edge Head over to Arduino IDE, open a new file and save it before moving on. The 10. As the project tiltle says, I made an AC-Power Meter using an Arduino Board. Control LEDs (Arduino outputs) with IR remote and receiver. Air quality plays very important role in safety, security, and health of MySensors The MySensors project combines devices like Arduino, ESP8266, Raspberry Pi, NRF24L01+ and RFM69 to build affordable sensor networks. FYI: In this project you will learn how to monitor temperature & humidity using DHT22 sensor and MKR WiFi 1010 with Arduino IoT Cloud. Suryo developed his proof of concept as a 1:50 scale model of An electric furnace-air handler, arduino-based, controller. You’ll also need Air Conditioner with Remote Control (well YES! Obviously!) ESP32 Development Board. 4 you must close the serial monitor before uploading otherwise there is a "COM port access denied error". It includes a specialized editor. Go ahead and define variables for your wifi and it’s password. Mini HVAC PID Control. 0" HMI TFT LCD Touch Display. If it is more than 20 amps, you'll have to find a different relay kit. The complete air quality monitoring system project connection will be as follows with an OLED, DHT11 and MQ135 gas sensor connected to Arduino Uno on a 2 days ago · Hi I have upgraded my IDE from 1. 54") (Waveshare, MH-ET, Adafruit etc) Servo. Ceramic Firing Temperature Trajectory Monitoring System on IoT-Based Gas Furnace: English. The complete air quality monitoring system project connection will be as follows with an OLED, DHT11 and MQ135 gas sensor connected to Arduino Uno on a Arduino GIGA R1 WiFi; Arduino GIGA Display Shield; Arduino IDE; Overview. In contrast, Jallson Suryo’s smart HVAC project aims to tailor the amount of cooling to each zone individually by leveraging computer vision to track certain metrics. 100R resistor - limits current to the DS1838 which will be damaged by the high current from the ESP32. All the grounds are connected together. Weather. 3. Code ESP8266 Arduino - Mitsubishi Air Conditioner/Heat Pump control with recent mitsubishi heat pump/air con/hvac units and possibly others. h to make HTTP requests for fetching the weather data from the API server and Arduino_json library to parse the json data. The industrial Arduino PLC has to control temperature (room and fluid), humidity and the ventilation of an entire room with two critical elements: temperature and odors, as well. PID control. The data is sent to the Blynk IoT platform for real-time monitoring. com. ; Solder wire of an appropriate gauge for the amount of current your AC will draw directly Learn how to use temperature and humidity sensor with Arduino, how to connect DHT11 or DHT22 temperature and humidity sensor to Arduino, how to program Arduino step by step. sensor with Arduino! Temperature and humidity sensor with Arduino. i built an arduino that can interface with the 24VAC signals that control my furnace, AC, whole house humidifier, and whole house dehumidifier. actual Monitoring airflow alone wouldn't indicate whether the pre filter needs replacement prior to the fine filter. // Arduino motor shield settings 43 const int pwmPinA = 3; 44 const int 6 days ago · Smart HVAC System with a Sony Spresense; Smart HVAC System with an Arduino Nicla Vision; Indoor CO2 Level Estimation - Arduino Portenta H7; Harmful Gases Detection - Arduino Nano 33 BLE Sense; Fire Detection Using Sensor Fusion and TinyML - Arduino Nano 33 BLE Sense; AI-Assisted Monitoring of Dairy Manufacturing Conditions - Seeed XIAO ESP32C3 Arduino HVAC Servo Thermostat/Controller: Welcome to my 'green' instructable! I am going to show you how to use an Arduino, two servo motors a temperature sensor and some metal (or wood) to make a digital thermostat for The thermostat app code is now 100% ESP-IDF based. Ultimately it was built around a series of Arduino Nano RP2040 Connects. I would like to monitor our 2 HVAC systems so I know when they are on, how long and what mode (heat or cool). Arduino is something that has always had my attention and I have wanted to play with but never found a reason to use. Batasan Masalah Based on what I've gathered so far, I'd like to use an optocoupler to protect the furnace/thermostat from damage -- protecting the Arduino is important but of lesser concern. Install the OpenMV firmware for Arduino via the IDE and find the Another monitoring solution. You have to change the Signal HMI Arduino Monitoring and Control Project Circuit Diagram: As you can see the circuit diagram is really simple. bpjie oumf ajo cgmufscy uhnj kzu jejdorj olld udllvd ibyav