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Arduino Forum Multi Scale Project - How to communicate wirelessly?
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Multi Scale Project - How to communicate wirelessly?

ldforget
ldforget over 8 years ago

Hello.  I have a project that Im starting that consists of 4 scales that need to communicate to a handheld device wirelessly.  Each scale will consist of 4 Load Cells and a HX711 board.  The handheld device I was thinking would just be a arduino with a LCD display.  The only information that needs to be displayed is the weight on each scale and position of the scale., The weight wont be changing much once its scaled, so refresh rate isnt important.  How should I go about communicating the data from the hx711 of the scales to the handheld device?

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  • clem57
    clem57 over 8 years ago +1
    For the HX711 portion, https://learn.sparkfun.com/tutorials/load-cell-amplifier-hx711-breakout-hookup-guide is excelant guide. As for setup wirelessly, http://makezine.com/projects/bees-sensors-monitor…
  • gadget.iom
    gadget.iom over 8 years ago +1
    What kind of range do you need?
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  • gadget.iom
    0 gadget.iom over 8 years ago

    What kind of range do you need?

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  • ldforget
    0 ldforget over 8 years ago in reply to gadget.iom

    I'm sorry, I should have included this.  15-20 feet or so would be LOTS.

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  • gadget.iom
    0 gadget.iom over 8 years ago in reply to ldforget

    Thats great thanks.

     

    I have used the Spark Core devices before, They are excellent devices. Just keep in mind that you will need to have a WiFi infrastructure within range of all your devices.

     

    It might also be worth considering an approach invoving the nRF24L01+. There is an article describing an almost identical usage case (using temp instead of weight) you can read here:

    http://www.elec-cafe.com/multiple-nodes-nrf24l01-wireless-temperature-ds18b20-with-arduino-uno-2-transmitter-1-receiver/

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  • ldforget
    0 ldforget over 8 years ago in reply to gadget.iom

    The system needs to be completely independent of any other system - I need it to work in the middle of the forest just as much as in a lab or shop, so if it requires a wifi network, that solution will not work for me.

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  • gadget.iom
    0 gadget.iom over 8 years ago in reply to ldforget

    Then of the two i've mentioned the nRF24L01+ might be the better.

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  • ldforget
    0 ldforget over 8 years ago in reply to gadget.iom

    Okay, I'll check that out later on during the day.  Thank you.

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  • ldforget
    0 ldforget over 8 years ago in reply to gadget.iom

    Yup, the nRF24L01+ is perfect for me.  Ordered a bunch of them, some arduino nanos, and some other misc stuff.  ill post back to let you all know how it goes when it gets here from china.  Give me 3 months. haha.

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  • gadget.iom
    0 gadget.iom over 8 years ago in reply to ldforget

    Lee Forget wrote:

     

    Give me 3 months.

    That's an optimistic deadline for postal delivery. image

    Keep us in the loop, I'm interested to find out how you get on.

     

    Paul

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  • gadget.iom
    0 gadget.iom over 8 years ago in reply to ldforget

    Lee Forget wrote:

     

    Give me 3 months.

    That's an optimistic deadline for postal delivery. image

    Keep us in the loop, I'm interested to find out how you get on.

     

    Paul

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