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Arduino via hx711 to app inventor 2 - Electronoobs Q&A

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+1 vote
I've watched your tutorial on bluetoothing a signal to app inventor 2 and then plotting the result. However I'm using a load cell amplifier HX711 not a potentiometer. It won't plot the signal as the arduino code uses Serial.Print which I think is sending a list of values not a single value. If I try to use the Serial.Write command the arduino code throws an error. Any ideas as I'm stuck!
asked in Arduino by (130 points)
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1 Answer

0 votes
What error do you have? Using .write you will send bytes not characters like letters or numbers.
answered by (33.8k points)
In app Inventor in just keeps plotting the same five values 13,10,46,48,51. In the first Bluetooth tutorial I get a reading that changes when I increase the load on the load cell,but in the plotting tutorial the numbers won't change. Strangely enough in the Arduino plotter I get a lovely graph but not in app Inventor!
Hi I am trying to get data from a hx711 amplifier via a arduino bluetoothed to app inventor. The hx711 is a digital amplifier and sends the signal using the serial.print function.
I think this is sending the data as an ascii value. app inventor will display the data in a text box but when I try to use the drawline
component it crashes. Would I be best changing the arduino code so I can use the serial write function or should I convert the data in app inventor into something I can use with drawline?