. DIGITAL WEIGHT METER circuit

Weight sensor output 0V when the load less than 150g,so we can not directly measure the load .My method is using a 200g local avoid measure blind spot.Read the analog data of 200g weight as no-load(0g),read the analog data of 700g weight as full load(500g).

Start test program

void setup() { Serial.begin(9600); } void loop() { int value; value = analogRead(0); Serial.println(value); }

Full program

from http://www.instructables.com/id/Arduino-Load-Cell-Scale/

Code:

/* sample for digital weight scale of hx711
 * library design: Weihong Guan (@aguegu)
 * library host on
 *https://github.com/aguegu/ardulibs/tree/3cdb78f3727d9682f7fd22156604fc1e4edd75d1/hx711
 */

// Hx711.DOUT - pin #A2
// Hx711.SCK - pin #A3

#include <Hx711.h>
Hx711 scale(A2, A3);

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.print(scale.getGram(), 1);
  Serial.println(" g");
  delay(200);
}

To put the measured value into a variable for further processing, replace the code in void loop with:

float value = scale.getGram();

Serial.print(value);

Serial.println(" g");

delay(200);