Load cell sensor

Connect the cables of the load cell as it is shown on the picture. From the documentation of the load cell find witch cable is the S+, S-, E+, E- and connect to the Weight Sensor Module.

When the load cell is connected, you have to connect the weight sensor module with the Arduino Uno. Connect the two GND pins with Arduino's ground ( GND ). Connect the two VCC pins with Arduino's power ( +5V ). Then, connect the DOUT pin to the Arduino's Analog Pin4 - A4. and the SCK pin to the Arduino's Analog Pin3 - A3.

Place the load cell on its position. You have to calibrate it in order to get real measurements.

We will use this library https://github.com/bogde/HX711

As mentioned in the README file of the library :
" How to Calibrate Your Scale
1 Call set_scale() with no parameter.
2 Call tare() with no parameter.
3 Place a known weight on the scale and call get_units(10).
4 Divide the result in step 3 to your known weight. You should get about the parameter you need to pass to set_scale.
5 Adjust the parameter in step 4 until you get an accurate reading. "