M5Stack Official Voltmeter Unit (ADS1115)

Voltmeter Unit is a voltage meter that can monitor the voltage in real time. The 16-bit ADC (analog-to-digital) converter ADS1115 is used internally to communicate through I2C (0X49).

In order to ensure the measurement accuracy, there is a built-in DC-DC isolated power supply, and the I2C interface is also electrically isolated through the low-power isolator CA-IS3020S.

This prevents noise and surges on the data bus or other circuits from entering the local ground terminal to interfere or damage sensitive circuits. Each Unit is individually calibrated when leaving the factory, initial accuracy of 0.1%FS, ±1 count, and a maximum measurement voltage of ±36V.

EEPROM (0x53) has built-in calibration parameters when leaving the factory. Please do not write to the EEPROM, otherwise the calibration data will be overwritten and the measurement results will be inaccurate.

Product Features

±36V range
LED power indicator
16-bit ADC conversion
Resolution: Auto range, Count ≤ 16V, 1mV; Count > 16V, 7.9mV
Initial accuracy 0.1%FS, ±1 count
Built-in CA-IS3020S isolation chip, anti-interference
Isolated DC-DC
Up to 1000 VRMS isolation withstand voltage
Development platform: Arduino, UIFlow (under development)
2x LEGO compatible holes

Includes

1x Voltmeter Unit
1x Grove Cable(20cm)

Application

voltmeter