7/23/2023 0 Comments Arduino bluetooth temp sensorSwitching off the LED is not needed when it stays below 80 for days but we do it anyway to avoid the situation where the toggle activated the LED and then temperature drops below 80 leaving the LED on (for days). Every half a second we toggle or switch off the led. The delay is still there otherwise blinking would become invisibly fast. ![]() ![]() To set upper temperature press button K1. In this tutorial we will take a look at how you can use a Arduino with a hc-06 and hc-05 Bluetooth module and a dht11 or dht22 temp and humidity sensor to. Learn how to read temperature from one or multiple sensors and build a web server to. Use buttons K2 and K1 to select temperature, then press K3 to lock it in. DS18B20 OneWire Temperature sensor with ESP32 using Arduino IDE. overwrite the repetetive lines with this :ĭigitalWrite(LED, !digitalRead(LED)) //always toggle when warmĭigitalWrite(LED, LOW) // always switch of when coldĭelay(500) // the delay can be taken out of the if else statement. Operating instructions: To set lower temperature, press button K2. Use Cypress Solar-Powered BLE Sensors, an Arduino UNO, and an HM10 BLE module to make your own multi-node temperature and humidity monitor and display. Sets up else statement, basically if the temperature is below 80 degrees the Arduino will just wait 10 seconds before taking another read.Ī bit more advanced approach: I recommend to keep 'if else' statements short and the blinking screams for a ' for loop' and a 'toggle' : To use the DHT11 with the ESP32, you will need to connect the DHT11 to the ESP32 and write code to read the temperature and humidity data from the DHT11 and transmit it over Bluetooth. Sets up the if statement, basically tells the Arduino to blink the LED for 10 seconds if the temperature is above 80 degrees Fahrenheit. The DHT11 is a low-cost temperature and humidity sensor that can be used in conjunction with the ESP32 to send temperature and humidity data over Bluetooth. Serial.print(kelvin) Serial.println(" degrees Kelvin, ") Serial.print(rankine) Serial.println(" degrees Rankine, ") įloat celsius = ((fahrenheit - 32) * 5/9) This can be accessed via the magnifying glass in the upper right hand side of the Arduino IDE.įloat millivolts = (rawvoltage/1024.0) * 5000 Arduino Bluetooth Shield ESP32 CP2104 DHT11 WIFI Bluetooth Temperature Humidity Soil Moisture Sensor Detection Module 18650 Battery Shield For Arduino MEGA V2. Will also print those values to the serial monitor. Converts the voltage being read on the Analog pin to Fahrenheit, Celsius, Rankine, and Kelvin. So far, I can connect to the Bluetooth module hooked up to an arduino uno r3 and I can display the temperature if I press the 'display' button. It will also print the temperature to the serial monitor. Step 1: Parts List 1 Arduino UNO/Nano /Mega/Micro 2 DHT22/DHT11 3 162 LCD 4 HC05 bluetooth module 5 wires 6 10k resistor 1pc 7 10k potentiometer 1pc 8 breadboard /solder kits 9 2.2Kohm 1pc 10 4. ![]() It tells the Arduino to read the sensor every 10 seconds and if the temperature is above 80 degrees Fahrenheit to blink the LED until the next read. So this code is what governs the Arduino.
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