IAMMETER Firmware

Firmware Updates and Release History

Use this page to identify the current stable firmware first, then browse the historical releases and their feature notes. The current firmware line is shown separately from the archive.

Current stable firmware

This is the version recommended for supported IAMMETER Wi-Fi energy meters. When a new stable release is published, this panel is updated and the previous version moves into the history below.

STABLE · CURRENT

i.91.065.18

Adds a read-only SunSpec integer meter-model map (201, 202 and 203) to Modbus/TCP. This implementation is not SunSpec-certified.

Implementation testing covered WEM3080T. The exact release file was verified as a download, but was not flashed during that validation cycle.

Read the integration guide for model compatibility, validation scope and TCP framing limitations before upgrading.

  • Check the supported model and hardware conditions before upgrading.
  • Verify the downloaded file with its SHA256 checksum.
  • Read the upgrade warning before updating a remote installation.
Download i.91.065.18 →Read the SunSpec release and integration guide →Upgrade from the App →

SHA256 checksumf65fef508c89a0c919d14155980521a26855015d62b6ebda2507c26541ab7014

Future-ready structure: the current page presents one unified firmware line. If different Wi-Fi modules require different packages later, each firmware line can be listed separately with its own supported models and download file.

Firmware release history

Older versions remain available as historical records. Version names and release dates below are organized from the IAMMETER Community firmware history; open the linked release article or original post before using an older package.

2026

Firmware

i.91.065

Added local brand APIs, browser-friendly CORS POST support and an MQTTS recovery improvement.

Read the release overview →
Firmware

i.91.063TS8

Added the energy history API endpoint and fixed an MQTT disconnect issue after an abnormal exit.

Read the feature article →

2025

Firmware

i.91.063T2

Added MQTTS, configurable upload interval through MQTT/MQTTS, custom HTTPS port support and updated Home Assistant discovery logic.

Read the upgrade information →
Firmware series

i.91.061 series

Included a memory-leak fix related to simultaneous Home Assistant discovery and MQTT upload.

View the community record →

2024

2023

Firmware

i.75.98.70

Added mDNS, CTCratio support and reactive power and kvarh values in Modbus/TCP; the post describes the feature set as i.75.98.69.

View the community record →
Firmware

i.75.98.66

Added cross-site local API support and compatibility updates for the WEM3080 product family.

View the community record →

2022 and earlier

Firmware

i.75.96

Bug-fix release for abnormal kWh data observed after upgrading from older metering firmware.

View the community record →
Firmware

2.75.69

Introduced MQTT upload, configurable upload intervals and net metering mode support.

View the community record →

Historical source: IAMMETER Community firmware update topic. Detailed feature explanations and current upgrade instructions should be maintained in IAMMETER Blog and Docs pages.