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Topic: getting data from a scales (Read 1 time) previous topic - next topic

cave2596

Sep 23, 2017, 08:49 pm Last Edit: Sep 23, 2017, 08:55 pm by cave2596
Heyho,

I wanted to read out the weight on a scales with an arduino.
As far as I could find out, it is quite complicated to get information from a LCD-connection and to get information directly from the sensors, I would need an amplifier...

Is there any other easy(er) way to get the information directly from the board?

Thanks in advance for your replies!

Greetings from germany
cave2596

(Attached you can find pictures of the circuit board of the scales)

jremington

#1
Sep 23, 2017, 10:53 pm Last Edit: Sep 23, 2017, 10:55 pm by jremington
Quote
Is there any other easy(er) way to get the information directly from the board?
Some scales have serial outputs (that one probably does not). Google may find them for you.

Zapro

Look at the HX711. It's a chip that can be connected to your load cell(s) and be interfaced with Arduino over SPI.

// Per.

cave2596

Look at the HX711. It's a chip that can be connected to your load cell(s) and be interfaced with Arduino over SPI.

Is it possible to attach two (or more) HX711 to one Arduino UNO?
Because it has only one set of pins for the SPI...

dannable

Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

jremington

#5
Sep 27, 2017, 02:47 am Last Edit: Sep 27, 2017, 02:47 am by jremington
Quote
Is it possible to attach two (or more) HX711 to one Arduino UNO?
Not easily, because there is no Chip Select (CS or SS) input on the HX711 chip.

dannable

In that case, what about software SPI? I have no direct experience of it but it may be worth investigating...

https://github.com/greiman/DigitalIO
Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

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