VAMeter

SKU: K136

Description

VAMeter is a professional programmable high-precision power meter, primarily used for high-accuracy voltage and current measurements. The product is based on the Stamp-S3 main control module, equipped with WiFi functionality, and features two INA226 current and voltage measurement circuits in series, offering current detection resolutions of 2.5uA and 250uA. The measurement range supports 0-5A and 5-24V (1-24V in isolated mode). The product offers flexible power supply options, supporting power input via USB-C or Base terminals, and includes built-in power and signal isolation. Users can toggle between isolated measurement with USB power supply and non-isolated measurement with direct power supply by flipping a switch, catering to different application needs. The included expansion BASE comes with relay control and Grove ports, facilitating secondary development. Additionally, the device supports OTA firmware updates, 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, greatly simplifying IoT application development. VAMeter is a highly practical and developable instrument, especially suitable for engineering projects requiring precise current and voltage measurements, as well as industrial automation, equipment monitoring, smart grids, and more.

Tutorial

Quick Start

Quick Start

This tutorial will introduce you to the VA Meter device tutorial & quick start

Features

• High-precision current detection (2.5uA/250uA resolution switching)
• Wide voltage input (5-24V)
• Cloud (EZData) data display
• PD input (internal PD decoy not included)
• Multiple power supply methods (PD INPUT/StampS3/external terminal)
• Power and signal isolation
• USB MSC/OTG functionality
• Open-source hardware and software
• Wireless OTA updates
• Development Platform
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • Platform.IO

Includes

• 1 x VAMeter
• 1 x VAMeter Base
• 2 x 3.81-2P terminals
• 4 x small brackets

Applications

• Industrial automation
• Equipment monitoring
• Power testing and analysis
• IoT devices
• Remote monitoring and data acquisition

Specifications

Learn

Download Mode

To enter download mode, hold the G0 button on the VAMeter before powering on, then release after power is applied.

M5 EZData Cloud Platform Example

Schematics

• VAMeter Schematics PDF
• VAMeter Base Schematics PDF

1/2

VAMeter Internal Circuit Logic Diagram

PinMap

VAMeter (INA226 & BUZZER)

VAMeter Expansion Output Pins

VAMeter Base

Grove

Model Size

PCB

• VAMeter Base Board PCB Size

Datasheets

• INA226

Softwares

ESP-IDF

• VAMeter Factory Firmware

Easyloader

Video

• VAMeter Feature Introduction

Product Comparison