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Wemos D1 mini with ESPeasy and 0-10V PWM converter - low voltage problem

Giewarro 1380 7
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  • #1 20020605
    Giewarro
    Level 6  
    I am running a wemos d1 mini from espeasy connected to a PWM to 0-10v converter purchased on alledrogo. Link .
    I am powering this 12v from 1A meeting the minimum requirements of 12V and >200mA. Unfortunately when manipulating the PWM to its full range I achieve values of 0 - 1.2v instead of 0-10v. Do I have an unlucky module or have I missed something?

    With the above I plan to replace the clunky recuperation controller (AC2800) with something integrable with Domoticz.

    Thanks in advance.
    Ps. Yes, I've been turning that knob, but it doesn't do anything.
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  • #2 20025854
    jarekgol
    Level 39  
    Give it a constant 3.3V on the control , then 5V (simulating 100%) and measure what then happens at the output.
    Do you have the converter output loaded with something?
    And I apologise in advance, but are you measuring on a fixed or variable range voltmeter?
    Check on a known voltage that the meter is working.
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  • #3 20026484
    mtbchn
    Level 3  
    Perhaps this will guide you. Wemos D1 mini with ESPeasy and 0-10V PWM converter - low voltage problem .
  • #4 20027045
    gps79
    Level 36  
    Author, in the link you pasted there is an auction with the title
    "0-10V 0-5V to PWM 0-100% converter", i.e. voltage to PWM conversion
    in the picture it says "PWM input, 0-10V output", i.e. PWM to voltage conversion
    What did you actually buy?
    Well, and paste a photo of what you have so that you can clearly see what IC is sitting there.
  • #5 20027087
    Anonymous
    Level 1  
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  • #6 20029465
    Giewarro
    Level 6  
    Thanks gentlemen! I couldn't stand it and, assuming the module was faulty, I bought another one, this time from gotronik with the designation BTE-716. Connected in the same way, it runs like a dream.
    Ps. @jarekgol admittedly I was measuring on a constant, but you have estimated well my state of electronic knowledge.
    @jarzabek666 I was changing the jumper getting results even lower by half.
    I was already powering the Wemos with 5V, via USB.
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  • #7 20030407
    jarekgol
    Level 39  
    Giewarro wrote:
    I was already supplying 5V, via USB.
    but they seem to have 3V3 on the I/O pins, set some pin to 1
    Code: Arduino
    Log in, to see the code
    .
    and measure with a voltmeter.
  • #8 20030434
    khoam
    Level 42  
    Giewarro wrote:
    I was already supplying 5V to the emos, via USB.
    .
    The ESP operates in 3V3 logic, not 5V. There is an LDO on the board that makes 3V3 from this 5V to power the ESP.
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Topic summary

The discussion revolves around a user experiencing low output voltage (0-1.2V) from a PWM to 0-10V converter connected to a Wemos D1 mini running ESPeasy. The user is attempting to replace an AC2800 recuperation controller with a solution compatible with Domoticz. Responses suggest checking the control voltage supplied to the converter, ensuring it is 5V instead of 3.3V, and verifying the load on the converter's output. It was noted that the converter may require a specific jumper configuration for proper operation. After assuming the original module was faulty, the user purchased a new converter (BTE-716 from Gotronik), which functioned correctly. The discussion highlights the importance of using the correct voltage levels and configurations for successful PWM to voltage conversion.
Summary generated by the language model.
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