Units – Mini Weight Unit HX711 Module Sensor



Description


WEIGHT integrates an 24 bits A/D chip HX711 that is specifically designed for electronic weighing device.

The input multiplexer selects either Channel A or B differential input to the low-noise programmable gain amplifier (PGA). Channel A can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively, when a 5V supply is connected to AVDD analog power supply pin. Channel B has a fixed gain of 32. There is no programming needed for the internal registers. All controls to the HX711 are through the pins.

In the test, we have this Unit channel A to connect a pressure sensor. Then use M5Core screen to display the weight data.

Feature


  • Two selectable differential input channels
  • On-chip active low noise PGA with selectable gain of 32, 64 and 128
  • On-chip power supply regulator for load-cell and ADC analog power supply
  • On-chip oscillator requiring no external component with optional external crystal
  • On-chip power-on-reset
  • Simple digital control and serial interface: pin-driven controls, no programming needed
  • Selectable 10SPS or 80SPS output data rate
  • Simultaneous 50 and 60Hz supply rejection
  • Current consumption including on-chip analog power supply regulator: normal operation < 1.5mA, power down < 1uA
  • Operation supply voltage range: 2.6 ~ 5.5V
  • Operation temperature range: -40 ~ +85℃
  • 16 pin SOP-16 package
  • Program Platform: Arduino, UIFlow(Blockly, Python)
  • Two Lego-compatible holes

 

Application


  • Micro weight meter
  • Kitchen Scale

 

Source PinMap


 

If WEIGHT was connected to GROVE A

M5Core(GROVE A) GPIO22 GPIO21 5V GND
WEIGHT Unit DATA Pin (DAT) CLOCK Pin (CLK) 5V GND

If WEIGHT was connected to GROVE B

M5Core(GROVE B) GPIO36 GPIO26 5V GND
WEIGHT Unit DATA Pin (DAT) CLOCK Pin (CLK) 5V GND

If WEIGHT was connected to GROVE C

M5Core(GROVE C) GPIO16 GPIO17 5V GND
WEIGHT Unit DATA Pin (DAT) CLOCK Pin (CLK) 5V GND

Include


  • 1x WEIGHT Unit
  • 1x Grove Cable

 


Datasheet