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DIY project: Heat buffer controller with ESP, DS18b20, TFT LCD 1.4, air sensor, NodeMCU v2/v3

szaryczlowiek831 540 4
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  • #1 19995249
    szaryczlowiek831
    Level 4  
    Hello.
    All in all I have a few questions for those versed in ESP and sensors.
    As in the topic, all the controllers I have found that have e.g. wifi connectivity and some other useful and useless features cost their own. I therefore decided to make my own.
    Nodemcu v2/v3 board
    3 or 4 DS18b20
    Tft LCD 1.4"
    Air sensor
    Probably 4 relays but I can do without that and make on esp-01s as a separate board for on/off pump control.
    Everything packed into an airtight box e.g. PK-0 EP-LUX IP55 with a cut-out for the display. Everything will stand either on esp-easy or supli, unless something else is recommended.

    I'm looking for an air sensor of the kind with no water features in total just to detect CO and CO² and to be essentially small. What do you guys recommend?
    DS18b20 does anyone know from what length of wire you need to solder a resistor?
    And lastly, it is known that the board itself can be powered by a regular phone charger. Do you recommend something instead? I wanted to put the power supply in the box with everything but I am afraid of the heat
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  • #2 19995267
    czareqpl
    Level 33  
    szaryczlowiek831 wrote:
    it only has to detect CO and CO² and be essentially small. What do you recommend?
    .
    I have a SCD30 for sale

    szaryczlowiek831 wrote:
    DS18b20 does anyone know from what length of wire you need to solder a resistor?

    From each, it is an OD type signal.

    szaryczlowiek831 wrote:
    And last, it is known that the board itself can be powered by an ordinary phone charger. Do you recommend something instead? I wanted to put the power supply in the box with everything but I'm afraid of the heat
    .
    Any sensible quality 230AC/5VDC power supply. Can be open frame.
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  • #3 19995303
    szaryczlowiek831
    Level 4  
    czareqpl wrote:
    szaryczlowiek831 wrote:
    it only has to detect CO and CO² and be essentially small. What do you recommend?
    .
    I have an SCD30 for sale
    .
    A bit of an expensive event personally I was thinking PMS7003 or MQ-07 or MP503
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  • #4 19995531
    czareqpl
    Level 33  
    szaryczlowiek831 wrote:
    czareqpl wrote:
    szaryczlowiek831 wrote:
    it only has to detect CO and CO² and be essentially small. What do you recommend?
    .
    I have an SCD30 for sale
    .
    A bit of an expensive event personally I was thinking PMS7003 or MQ-07 or MP503


    Since it's expensive without even knowing the price it's OK :)
  • #5 19996021
    szaryczlowiek831
    Level 4  
    czareqpl wrote:
    szaryczlowiek831 wrote:
    czareqpl wrote:
    szaryczlowiek831 wrote:
    szaryczlowiek831 wrote:
    it only has to detect CO and CO² and be essentially small. What do you recommend?
    .
    I have an SCD30 for sale
    .
    A bit of an expensive event personally I was thinking PMS7003 or MQ-07 or MP503


    Since it's expensive without even knowing the price it's OK

    I searched online and found the cheapest (SCD30) at majfrend for 144PLN and 160PLN in Polish shops the cheapest stands at 230PLN but out of stock. So I don't think you will want 100 zł. and I don't intend to spend more because I can solve this problem in another way (cheaper) but not "smart". Well unless I'm wrong and you want to sell it for less than a hundred, but then correct me.
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