DFRobot Gravity v2.1.0 - I2C Digital Wattmeter

Index: DFR-13753 EAN: 5904422377380

A module that allows you to measure electric energy consumption of up to 26 V / 8 A. The maximum measurement error is approx. 0,2%. It communicates through an I2C interface. It works with Arduino and Raspberry Pi.

DFRobot Gravity v2.1.0 - I2C Digital Wattmeter
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Manufacturer: DFRobot
Compatibility: Arduino Raspberry Pi

Description of product: DFRobot Gravity v2.1.0 - digital meter of power consumption I2C

A module that allows you to measure electric energy consumption of up to 26 V / 8 A. The maximum measurement error is approx.0,2%(before the first use, it requires a simple calibration). It can be used tomeasure the actual current consumption or evaluationof the service lifeof the battery.The kit includes a cable adapted to Gravity DFRobot IO Expansion Shield.

DFRobot Gravity - cyfrowy miernik zużycia energii

The application of the energy consumption meter

  • Solar power management
  • The battery indicator
  • The indicator of the power consumption of the electric device

The product is compatible withArduino

User manual for the connection and sample code can be found onthe website of the manufacturer.

Example of connection with Arduinoandanalog PH sensor

The chip usesTI INA219system with the zero temperature of drift of monitoring the current/power and resistor of 10mΩ with high power of 2 W and low temperature of drift. The resolution of voltage and current is4 mVand1 mA. The module has4 I2C addressesselectable withDIP switch. It accurately measures the high, bi-directional currents which is especially useful in applications that usesolar orbattery  power in which the rechargeable battery should be charged and discharged.

Przykład podłączenia miernika zużycia energii z Raspberry Pi

Connection example withRaspberry Pi

Specification of meter of power consumption

  • Version: 2.1.0
  • Supply voltage: from 3.3 V to 5 V
  • Voltage measurement range: 0 V to 26 V
  • Resolution voltage: 4 mV
  • Error of voltage measurement: up to 0,2% (typical)
  • Measuring range of the current: from 0 to 8 A (bi-directional)
  • Resolution of the current: 1 mA
  • Error of current measurement: up to 2% (typical, it requires manual calibration)
  • The range of power measurement: from 0 to 206 W
  • Resolution power: 20 mW (hardware) / 4 MW (software)
  • Quiescent current: 07 mA
  • Interface: I2C Gravity
  • I2C address: 0x40, 0x41, 0x44, 0x45
  • Dimensions: 30 x 22 mm
  • Weight: 4 g

Package width 5.5 cm
Package height 2.5 cm
Package depth 6 cm
Package weight 0.015 kg

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Product reviews

DFRobot Gravity v2.1.0 - I2C Digital Wattmeter


Average grade


Customers opinion
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Antonín 12.01.2024 Confirmed purchase Translated review
Great product, works great. An advantage is also the supplied library for Arduino. The sample program works even without modification, just upload it to the microcontroller and the sensor immediately sends data.
Marek 03.01.2024 Confirmed purchase Translated review
no comments, good product, does what you need
Mikołaj J. 16.02.2022 Confirmed purchase Translated review
Everything works as it should
Mirosław 04.06.2023 Confirmed purchase
Grzegorz 26.12.2022 Confirmed purchase
Szymon 11.10.2022 Confirmed purchase

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