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The HX711 is a precision 24-bit analog-to-digital converter (ADC) specifically designed for weigh scale applications. It can be easily interfaced with the Arduino Uno to create accurate and reliable weight measuring systems. In this beginner’s guide, we will walk you through the steps on how to use the HX711 with the Arduino Uno.
Step 1: Gather all the necessary components
Before starting with the interfacing process, make sure you have all the required components handy. You will need an Arduino Uno board, an HX711 module, a load cell, a 10k resistor, jumper wires, and a breadboard for connecting the components.
Step 2: Connect the components
Start by connecting the HX711 module to the Arduino Uno. Here is the pinout connection:
– HX711 VCC to Arduino 5V
– HX711 GND to Arduino GND
– HX711 DT (Data) to Arduino Pin 2
– HX711 SCK (Clock) to Arduino Pin 3
– Connect the load cell to the HX711 module using the provided four-wire cable. Make sure to connect the red and black wires to the E+ and E- terminals of the load cell, respectively.
Step 3: Download and install the HX711 library
To make interfacing easier, you will need to download and install the HX711 library. You can find it on the Arduino Library Manager by searching for “HX711.” Once installed, you can include the library in your Arduino sketch by navigating to Sketch -> Include Library -> HX711.
Step 4: Write the Arduino sketch
Now it’s time to write the Arduino sketch that will read and convert the load cell data using the HX711 module. Here is a sample code that you can use:
#include “HX711.h”
#define DOUT 2
#define CLK 3
HX711 scale(DOUT, CLK);
void setup() {
Serial.begin(9600);
scale.set_scale();
scale.tare();
}
void loop() {
float weight = scale.get_units(10);
Serial.print(“Weight: “);
Serial.print(weight);
Serial.println(” g”);
delay(1000);
}
This code initializes the HX711 module, sets the scale, and tares it before continuously reading and displaying the weight data on the serial monitor.
Step 5: Upload the code to the Arduino Uno
Connect the Arduino Uno to your computer using a USB cable and upload the code to the board. Open the serial monitor to see the weight readings in real-time.
Congratulations! You have successfully interfaced the HX711 module with the Arduino Uno to create a simple weight measuring system. Feel free to experiment with different load cells and calibration settings to achieve the desired accuracy and precision.
In conclusion, the HX711 module offers a cost-effective and reliable solution for integrating weight measurement capabilities into your Arduino projects. By following this beginner’s guide, you can easily use the HX711 module with the Arduino Uno to create your own customized weight measuring system. Happy tinkering!
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