VA Meter

SKU:K136

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Description

VA Meter is a professional programmable high-precision power meter designed for accurate voltage and current measurement. This product is based on the M5StampS3 main control module, supporting WiFi functionality. It features two serially connected INA226 current and voltage measurement circuits, providing current detection resolutions of 2.5uA and 250uA, and supports a measurement range of 0-5A and 5-24V (1-24V in isolation mode). The product can be powered through a USB-C interface or Base terminal input and includes built-in power and signal isolation. Users can select between isolated measurement via USB power or non-isolated measurement using direct power through a toggle switch, catering to different application needs. The accompanying expansion BASE includes relay on/off control and a Grove port for secondary development.

Additionally, the instrument supports OTA firmware upgrades and USB MSC/OTG functionality, allowing users to edit and view data and configuration files stored in the main control file system on a PC. M5 also provides a free online data API interface, enabling users to upload test data to the EZData platform for remote access and browsing, significantly simplifying IoT application development. The VA Meter is a versatile and developer-friendly instrument, ideal for engineering projects requiring precise current and voltage measurements, as well as fields such as industrial automation, equipment monitoring, and smart grids.

Tutorial

Quick Start

Quick Start

This tutorial will introduce you to the VA Meter device tutorial & Get started quickly

Download Mode

If you want to enter download mode, press and hold the G0 button on StampS3 before turning it on, then release it after powering it on.

Features

• High precision current detection (2.5uA/250uAResolution switching)
• Wide voltage input (5-24V)
• Cloud (EZData) data display
• PD input (internal does not contain PD decoy)
• Multiple power supply modes (PD INPUT/StampS3/External terminal)
• Power is isolated from signal
• USB MSC/OTG function
• Open source hardware and software
• OTA Upgrade

Includes

• 1x VA Meter
• 1x VA Meter Base
• 2x 3.81-2P terminal
• 4x Hanger (small)

Applications

• Industrial Automation
• Equipment Monitoring
• Power Testing and Analysis
• Internet of Things (IoT) Devices
• Remote Monitoring and Data Collection

Specification

EasyLoader

Download VA Meter Factory Firmware Easyloader

M5 EZData Cloud Platform example

PinMap

• VAMeter(INA226 & BUZZER)

• VAMeter Extra output pin

• VAMeter Base

• Grove

VAMeter compared to other brands

Related Link

• INA226

Schematic

• VAMeter

• VAMeter Base

• VAMeter internal circuit logic diagram

VA Meter Schematic PDF

VA Meter Base Schematic PDF

VAMeter Base PCB Download

Module Size

Examples

IDF

• VA Meter factory firmware

Video

• VAMeter Function Introduction