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  1. #1
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    ESP32 Modbus RTU and measuring miliamp current

    Hi!

    Is it possible to use Modbus RTU directlly on the pins of an ESP32? Using arduino framework on VSC. Or should I use a MAX485?

    For measuring miliamp current in a 240Vac system can I use ACS712? Is there other option?

    Thanks,
    Bruno

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    Re: ESP32 Modbus RTU and measuring miliamp current

    Quote Originally Posted by brunofunchas View Post
    Hi!

    For measuring miliamp current in a 240Vac system can I use ACS712? Is there other option?

    Thanks,
    Bruno
    Hello,

    you can choose: ACS70331

    Here is link to it :

    https://www.digikey.com/product-deta...0-1-ND/8120690

    These sensor have smaller noise (8ma for 1MHz band), and bigger sensibility. For AC current you have to average a half of period (for sinus curve).

    For first question - yes using a Max485 is simpler(and in my opinion better) option.

    Regards


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  3. #3
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    Re: ESP32 Modbus RTU and measuring miliamp current

    Thanks,

    I'm going to look at it. I will have to hand soldering the PCB so i will look to other type of Package / Case.



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