Crowtail-Weight Sensor

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The Crowtail-Weight Sensor uses 24-bit high-precision A / D converter chip HX711, is a high-precision electronic design, with two analog channel input, the internal integrated 128-fold gain programmable Amplifier, the pressure signal into analog voltage signal after the AD module to enlarge to digital signals. The input circuit can be configured to provide bridged bridge-type (such as pressure, weighing) sensor mode, is an ideal high-precision, low-cost sampling front-end module; module output four lines,

Model:Sensor-p-1229.html Crowtail-XXXXX



  • Weighing pan size: 10cm × 7cm.
  • Operating voltage: 5V.
  • Maximum range: 5Kg.
  • Total height (including pillars): 3.5cm.
  • Measurement accuracy: not more than 1g.


This demo is going to show you how to read weight information from this Crowtail-Weight Sensor.

1.Hardware Connection
The Crowtail-Weight Sensor is connecting to I2C port of Crowtail - Base Shield.

Connection of Crowtail-Weight Sensor.jpg

2.Download the hx711 Library. Unzip and put it in the libraries file of Arduino IDE by the path: ..File/arduino IDE/Arduino/library/hx711. You can also copy the following program to Arduino IDE and upload to your Arduino/Crowduino.

#include "hx711.h"

Hx711 scale(SCL, SDA);

void setup() {



void loop() {

  Serial.print(scale.getGram(), 1);
  Serial.println(" g");


4.Upload it into your Arduino board and open the serial monitor to observe the weight information after put things on the weighting pan.

Result of Weight Sensor.png

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