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Home Weight Sensor Module 20kg BMH01220 (V2)
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Weight Sensor Module 20kg BMH01220 (V2)

US$6.40
In stock
Quantity
10 pieces
Product ID
BMH01220

The BMH01220 is a weight measurement module with a maximum measuring weight of 20kg. It includes 4 half-bridge strain gauge load sensors and a measurement module. It has integrated 24-bit Delta Sigma ADC and algorithms so that an external MCU can directly read the weight value through the I2C or UART interface.

NOTE
  1. For technical support, please contact Best Health
    email: service@e-besthealth.com
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Product Description
DESCRIPTION

Calibration is required before using the product to ensure accurate measurements.
The calibration process has two steps:

  1. Zero-point calibration: place nothing on the weighing plate. The product is calibrating for the weight of 0kg in this step.
  2. Maximum value calibration: place an accurate weight (eg, a standard weight) of the maximum value on the weighing plate. The product is calibrating for the maximum weight in this step.
FEATURES
  1. Operating voltage: 2.6V to 5.5V
  2. Operating current @3V: 1.5mA (typ.), 2.4mA (max)
  3. Standby current @3V 1uA (typ.), 3uA (max.)
  4. Measurement range: 0~20kg
    - Accuracy: 0.05% F.S. (non-linearity)
    - Resolution: 1g
  5. Output sensitivity: 1.2 ±0.15mV
  6. Wide voltage input range
  7. Low standby power consumption
  8. Directly outputs weight value without requiring additional A/D conversion
  9. Interface: I2C (address: 0xA0) / UART (baud rate: 9600bps)
  10. Dynamic taring function achieved using I2C / UART commands
  11. Dimension: PCB 22 x 16 x 2 mm / load cell 26 x 26 x 10 mm
  12. Net weight: 21.6g
PIN DESCRIPTION
Pin Pin name Function
1 GND Ground
2 SDA I2C: data line
3 SCL I2C: clock line
4 VDD Power supply: 2.6V~5.5V
5 TX UART: TX
6 RX UART: RX
GETTING STARTED

We use an external LCD display to show the calibration and measurement processes.
If you don't have an LCD display, you can use the serial monitor in Arduino software instead.

Please calibrate the load cell before starting measuring.
  1. The display shows "CAL0" after power-on. It is calibrating the zero weight in this step.
    Please do not place anything on the load cell in the meantime.
  2. It shows "PASS" if the zero weight calibration has completed.
  3. Place the 4kg of standard weights on the load cell when the display shows "CAL1".
    (The default calibration weight in the Arduino demo code is 4kg. Users can adjust it themselves.)
  4. The display shows "PASS" when the calibration has completed. Now the weighting can begin.
More Information
HS Code (reference) 8473.50.00.00-1
Datasheet V1.6 (Simplified Chinese version) (732.73 kB)
Example Code (1.81 kB)
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