Skip to Content

Energy metering that grows with your panel

Modules for your controller, meters that work on their own, and one path to the whole site.

One bus, one library — from a single circuit to a synchronized network.

Which one do I need Shop

Measure & Meter · STD-U3I3 Measure · BASIC ×3 Connect · your ESP32 + rbgrid rbAmp Hub · in development

Everything in the panel is one of three roles

Add, never replace: modules from stage 1 keep working in stage 4.

available

Measure

Current, power and energy per circuit, from your own controller.

BASIC · STD

Measure — BASIC
available

Measure & Meter

A meter that works on its own: import and export counted on the module, Modbus RTU.

STD

Measure & Meter — STD
in development

Connect

The whole panel as one system. Today: your ESP32 with rbgrid or ESPHome. Next: rbAmp Hub.

rbAmp Hub

Connect — rbAmp Hub

What is your entry point?

Pick the task, not the module.

Measure

“One number from the meter is not enough.”

Per-circuit monitoring →

Meter · Measure

“Export breaks my charts; the counter jumps after a reboot.”

Whole-house & solar →

Meter

“Everything is off and the meter still turns.”

Find the vampires →

Meter

“A meter per tenant, not a cabinet of meters.”

Sub-metering →

Meter

“My inverter expects a meter on RS-485.”

Inverter & SCADA via Modbus →
Connectin development

“All meters of the site at one instant.”

Whole-panel synchronized →

One installation, four stages

Every step adds; nothing is replaced. Modules from stage 1 keep working in stage 4.

1
available

Modules and your master.

2
available

BASIC and STD on one bus; STD standalone over Modbus.

3
in development

rbAmp Hub with shields.

4
planned

Several hubs and sites under rbAmp Server.

Why it is a platform

One bus

Two wires from a single circuit to a panel.

One library

begin() detects the line.

One contract

One published, versioned register contract.

One moment

A whole-site snapshot over the bus.

Platform architecture

Data you can trust

Metering lives on the module.

Counters on the module

Counters live on the module and are saved every second.

Import and export

Two counters, not a balance.

Small loads are visible

Current in microamperes, energy in microwatt-hours.

Updates that roll back

Updates without stopping metering; a failed image rolls back.

Measure & Meter — STDSource: Docs › STD › Energy and periods

Use it your way — with your stack

The module speaks plain I²C and returns physical units. Pick the native library for your platform.

Arduino

v0.4.x

STD: in validation

ESP-IDF

v0.4.x

STD: in validation

Python

v0.3.x

STD: in validation

ESPHome / Home Assistant

v0.2.x

STD: in validation

Modbus RTU

Any Modbus client reads the module.

available

rbgrid

Local master firmware · rbgrid.io

available

rbAmp Server

Local server for many hubs and sites.

planned

Open documentation and libraries on GitHub.

BASIC map v1.3 STD map 0x36 STD firmware v2.1

Docs GitHub rb-amp

rbAmp by RocketController · RobotDyn, rbDimmer since 2018.

PHOTO-TODO
panel · BASIC + STD
PHOTO-TODO
clamp on a conductor

Projects & Tutorials

All posts

FAQ

Basic or STD: an honest answer

Which module fits your panel — a decision guide with examples.

Tech

Why the meter should live on the module, not on the ESP32

On-module counters survive reboots and OTA; master-side counters don't.

Tech

Firmware updates you cannot break

Dual-slot OTA with automatic rollback: how it works on STD modules.

Platform releases

New STD modules, Hub, libraries, firmware. One list for the whole platform.