mirror of
https://github.com/RobTillaart/Arduino.git
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94 lines
1.8 KiB
C++
94 lines
1.8 KiB
C++
//
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// FILE: HX_calibration.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: HX711 demo
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// URL: https://github.com/RobTillaart/HX711
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#include "HX711.h"
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HX711 myScale;
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uint8_t dataPin = 6;
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uint8_t clockPin = 7;
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uint32_t start, stop;
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volatile float f;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.print("LIBRARY VERSION: ");
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Serial.println(HX711_LIB_VERSION);
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Serial.println();
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myScale.begin(dataPin, clockPin);
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}
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void loop()
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{
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calibrate();
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}
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void calibrate()
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{
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Serial.println("\n\nCALIBRATION\n===========");
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Serial.println("remove all weight from the loadcell");
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// flush Serial input
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while (Serial.available()) Serial.read();
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Serial.println("and press enter\n");
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while (Serial.available() == 0);
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Serial.println("Determine zero weight offset");
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myScale.tare(20); // average 20 measurements.
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uint32_t offset = myScale.get_offset();
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Serial.print("OFFSET: ");
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Serial.println(offset);
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Serial.println();
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Serial.println("place a weight on the loadcell");
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// flush Serial input
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while (Serial.available()) Serial.read();
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Serial.println("enter the weight in (whole) grams and press enter");
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uint32_t weight = 0;
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while (Serial.peek() != '\n')
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{
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if (Serial.available())
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{
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char ch = Serial.read();
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if (isdigit(ch))
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{
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weight *= 10;
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weight = weight + (ch - '0');
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}
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}
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}
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Serial.print("WEIGHT: ");
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Serial.println(weight);
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myScale.calibrate_scale(weight, 20);
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float scale = myScale.get_scale();
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Serial.print("SCALE: ");
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Serial.println(scale, 6);
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Serial.print("\nuse scale.set_offset(");
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Serial.print(offset);
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Serial.print("); and scale.set_scale(");
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Serial.print(scale, 6);
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Serial.print(");\n");
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Serial.println("in the setup of your project");
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Serial.println("\n\n");
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}
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// -- END OF FILE --
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