M5Stack VA Meter with Voltage and Current Measurement

The M5 Stack VA Meter is a professional, programmable high-precision power meter designed for accurate voltage and current measurement. It is based on the M5StampS3 main control module and supports WiFi functionality. The device features two series-connected INA226 current and voltage measurement circuits that provide a current detection resolution of 2.5uA and 250uA and support a measurement range of 0-5A and 5-24V (1-24V in isolation mode). It can be powered via a USB-C interface or the base input and includes built-in power and signal isolation. Users can choose between isolated measurement via USB power or non-isolated measurement with direct power supply via a toggle switch. The included expansion BASE includes relay on/off control and a Grove port for secondary development. Additionally, the device supports OTA firmware upgrades and USB MSC/OTG functionality, allowing users to edit and view data and configuration files stored in the main control system on a PC. M5 also offers a free online data API interface, allowing users to upload test data to the EZData platform and access it remotely, significantly simplifying the development of IoT applications. The VA Meter is a versatile and developer-friendly instrument, ideal for engineering projects requiring precise current and voltage measurements, as well as for fields such as industrial automation, equipment monitoring, and smart grids.

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Features:

The VA Meter offers high-precision current detection with a resolution of 2.5uA/250uA.
It supports a wide voltage input range of 5-24V.
The device allows real-time data display via the EZData Cloud.
It offers multiple power supply modes, including PD Input, StampS3, and external terminal.
The power supply is isolated from the signal to ensure accuracy and safety.
OTA upgrades are supported to keep the device up to date.