52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*
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Example using the SparkFun HX711 breakout board with a scale
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By: Nathan Seidle
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SparkFun Electronics
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Date: November 19th, 2014
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License: This code is public domain but you buy me a beer if you use this and we meet someday (Beerware license).
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This example demonstrates basic scale output. See the calibration sketch to get the calibration_factor for your
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specific load cell setup.
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This example code uses bogde's excellent library: https://github.com/bogde/HX711
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bogde's library is released under a GNU GENERAL PUBLIC LICENSE
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The HX711 does one thing well: read load cells. The breakout board is compatible with any wheat-stone bridge
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based load cell which should allow a user to measure everything from a few grams to tens of tons.
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Arduino pin 2 -> HX711 CLK
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3 -> DAT
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5V -> VCC
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GND -> GND
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The HX711 board can be powered from 2.7V to 5V so the Arduino 5V power should be fine.
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*/
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#include "HX711.h"
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#define calibration_factor -10160.0 //This value is obtained using the SparkFun_HX711_Calibration sketch
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#define DOUT 3
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#define CLK 2
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HX711 scale;
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void setup() {
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Serial.begin(9600);
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Serial.println("HX711 scale demo");
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scale.begin(DOUT, CLK);
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scale.set_scale(calibration_factor); //This value is obtained by using the SparkFun_HX711_Calibration sketch
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scale.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0
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Serial.println("Readings:");
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}
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void loop() {
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//Serial.print("Reading: ");
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//Serial.print(scale.get_units(), 1); //scale.get_units() returns a float
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//Serial.print(" lbs"); //You can change this to kg but you'll need to refactor the calibration_factor
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//Serial.println();
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Serial.println(scale.get_units(), 1);
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}
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