BossMonitor

See announcement in the hardware configuratio section.
viewforum.php?f=7

END OF SUPPORT for XIAO
Hardware & Pin Constraints: The Seeed Studio XIAO platform has limited GPIO pins and lack of native dual RJ45 / onboard transceiver support, whereas the Waveshare ESP32-S3 board provides dedicated RS485 and CAN transceivers with sufficient I/O and direct expansion ...

We've added a Device Name feature to BossMonitor. This was requested by an installer running two independent inverter
systems sharing a common battery bank, each with its own GridBoss.

The Problem

When two BossMonitors are on the same network, both answer to the same name in the browser and ...

My plan is to offer a few configurations.

BossMonitor — Hardware Configurations

Option 1 — XIAO
Seeed XIAO ESP32-S3 with RS485 breakout board. This is the production unit — compact, reliable, passive
RS485 listener so it never disturbs the inverter communication bus. Ships pre-flashed ...

Hi everyone,

I’m Gerard, an embedded firmware developer with a long background in low-level real-time software, servo systems, and storage automation.

I am 74 years old, retired and these days, I operate a small country property down in Dayton, Texas, running my own off-grid/hybrid solar setup ...

Easily Locate Your Boards (Android & Windows PC)

When setting up or accessing your BossMonitor board, relying on bossmonitor.local (mDNS) doesn't always work. Depending on your home router, local network configuration, or firewall settings, your network may fail to resolve the .local hostname ...

Load Totals
It always bother me to have the EPS to value to have the backup loads added to the smart port loads. I had to do mental math to determine how much of the total was going to the house.

So there are three new blocks on the eg4monitor page showing the smart ports+ the backups = the ...

FIRMWARE RELEASE 08/02/2026
Report that the Bossmonitor was dropping offline whe used on a Unifi system.
Unable to duplicate but ...

The ESP32 has a WiFi power-saving mode enabled by default that periodically puts the radio to
sleep to save battery. On Unifi networks this causes frequent ...

NEW battery notification feature

Adding a battery divergent SOC feature that will send alerts whe the SOC of the individual batteries begin to drift apart.
The precent different will be settible in the notification section.

Under development.

Removing the MITM feature.
THIS IS A MAJOR COURSE CHANGE

In the MITM mode (bms relay) the Bosmonitor would intercept the battery BMS data then forward it to the EG4 cloud.
This had severl issues.
1. Bossmonitor had to be in the middle of the communication path for the BMS data.
2. Required a ...