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sagrus2020-08-19 10:19:59
Microcontrollers
sagrus, 2020-08-19 10:19:59

How to control the opening of the refrigerator door in alerts?

Good afternoon!
There is a task: to implement a small module with a screen that will display the temperature inside the refrigerator (with a temperature sensor inside the door), as well as record the opening and closing of the door (reed switch).
If the door is open for too long, some kind of squeak or beep should appear.
The screen should show the temperature and the status of the door: open / closed / close the door (with a long opening)
Also, when opening and closing the door, the module should send a request to the http address (for each action a separate address), and, if possible, periodically send to http address data about the current temperature inside.
How to implement it? I understand that with the help of components from Ali.
But what? What controller to use? Where to dig? Please direct someone who understands this.

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5 answer(s)
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GavriKos, 2020-08-19
@GavriKos

The simplest thing is to start with an arduino + additional modules such as a temperature sensor, a reed switch and a wifi. This is the fastest option.

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Vladimir Kuts, 2020-08-20
@fox_12

To get by with a minimum of details, you can take ESP8266 + DS1820 sensors + 1602 display + reed switch

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Andrey Bondarenko, 2020-08-27
@pt200

When I made a refrigerator door opening counter (I double-checked a fact from an advertisement), I used a photo sensor (when the door is closed - it's dark)
Well, ESP, if you need to send http requests.

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Fixid, 2020-08-20
@Fixid

ESP8266 NodeMCU + DS18B20 + any reed switch module + any piezo + power module
On Ali, everything is modular.
If you wish, you can take a completely finished board from 8266 where you can only put an 18650 battery and solder the reed switch

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Vladimir Korotenko, 2020-08-19
@firedragon

Any nano + plus such a screen
arduino-diy.com/arduino-zhidkokristallicheskiy-dis...
And a reed switch
https://xn--18-6kcdusowgbt1a4b.xn--p1ai/%D0%B3%D0%...

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