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Temperatur-SensorScript-SKO
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The Arduino code for a DHT22 temperature sensor. Code is to be used with ESP-32S or ESP8266 board, at Syddansk Erhvervsskole
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unknown 593ecfa7e0 Fixed minor spelling mistake 2022-10-03 12:44:50 +02:00
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TemperatureSensorScript_for_ESP8266 Fixed minor spelling mistake 2022-10-03 12:44:50 +02:00
README.md Improved readability again 2022-08-31 13:56:09 +02:00

README.md

Arduino Temperature SensorScript

Preparations

To start you will need either an ESP32S or an ESP8266 as these scripts are made with them in mind.
The temperature sensor used for these scripts is the DHT22

Setup

To upload the script to the ESP you will first need to follow these steps:

  1. Download Arduino IDE from Arduino's website https://www.arduino.cc/en/software (be sure to checkmark Install USB driver and Associate .ino files in setup installation), then plug in your board
  2. Download the script fitting your board from this Git and open it in the IDE
  3. In the upper navigation bar click on File, then click on Preferences
  4. In Preferences there should be a field called Additional Boards Manager URLs:, copy and paste below links to that field, and then click OK

    https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json,http://arduino.esp8266.com/stable/package_esp8266com_index.json

  5. Once more in the navigation bar, click on Tools, then Board: and then Boards Manager...
  6. In Boards Manager search either esp32 or esp8266 depending on your board, and then click Install
  7. Back in Board: select the appropriate board (for ESP32 I use Node32s, and for ESP8266 Boards I use LOLIN(WeMos) D1 R1)
  8. Still in the Tools click on Port: and select the port your Arduino is in
  9. Now in the navigation bar click on Sketch, then Include Library, and then Manage Libraries...
  10. In the upper search in Library Manager search DHT sensor library and choose the library "DHT sensor library" by Adafruit, install all other libraries needed for the download to complete
  11. Finally upload the sketch by clicking the arrow pointing right (for the ESP32S you will need to hold down the Boot button and let go when it says Connecting... in the console)
  12. You should now be able to see it connecting to the internet through the serial monitor, or by observing the boards built in led

Connecting Sensor

These scripts use pin 21 for ESP32 and pin D4 for ESP8266, feel free to change them if needed.
The DHT22 needs to be connected to either 3V3 or 5V, ground (G), and the serial pin stated above.

Notes

Once it connects to the wifi, the board should send a POST request upon startup.
When connecting to wifi the built in LED will blink, when sending POST request it will flicker, and when it can't read the sensor it will be lit up