No marketing fluff. These are the real pages served by your Pylon-Monitor — the same monitoring, diagnostics and Home Assistant integration screens — at http://pylon-monitor.local, exactly what you'll see the moment you plug it in. And that moment is under 2 minutes after opening the box.
On the master battery: CONSOLE goes to the Pylon-Monitor, LINK PORT 1 goes to the slave battery.
The mistake almost everyone makes: LINK PORT 1, not LINK PORT 0 The cable that chains your master battery to the first slave must leave LINK PORT 1 on the master — never LINK PORT 0. It plugs into LINK PORT 0 on the slave, and every further battery repeats the same 1 → 0 pattern. Wired the other way round the master never sees the rest of the stack, so Pylon-Monitor reports a single battery no matter how many you own.
PHYSICAL SCREEN
Built-in TFT display
A crisp 1.8" IPS TFT panel shows the State of Charge in giant digits, with voltage and current beside it and SOH and cycle count below — readable across the room, no phone required.
1.8" IPS TFT — full color, real photo
No fan, no buttons to fiddle with — just glance at the box.
FIRST BOOT
Captive portal WiFi setup
On first power-on, the Pylon-Monitor creates its own network PylonMonitor-Setup. Connect from any phone, the setup page opens by itself.
No app to install, no QR code
Scans surrounding networks automatically
Saves credentials and reboots — done
Reopens after a Factory Reset — or 2 quick taps in a row on the reset button (back of the enclosure) if you just need to switch WiFi networks, without wiping anything else
Set up your Pylon-Monitor×
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pylon-monitor.local
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Sign in — Pylon-Monitor×
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pylon-monitor.local/login
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Pylon-Monitor
Sign in to the dashboard
admin
••••••••
Sign in
Forgot it? 3 presses on the reset button restore factory settings.
AUTH — ALWAYS ON
Your own password, created on first access
The first time you open the dashboard, the device asks you to create your own password — there is no default password shared between devices. From then on this sign-in screen protects the dashboard and its settings, as required by the European cybersecurity rules for connected devices (RED directive, EN 18031 standard).
Created by you on first access — no default password
Too-short or too-common passwords are refused, repeated wrong attempts are slowed down
Real random session cookie, HTTP-only; saved passwords are never sent back to the browser
Forgot it? 3 presses on the reset button (on generation 2, unplugging the USB cable 3 times works too) restore factory settings
MAIN PAGE
Live battery dashboard
The home screen of the device. Live cards for Charge, Health, Temperatures, System and Cells, plus a 24h history graph — and one nav strip to jump anywhere in two clicks.
SOC, voltage, current, power, state in real time
SOH, cycles, cell imbalance, WiFi signal, MQTT status
Base & MOSFET temperatures, per-cell voltages
Up to 16 batteries chained together (e.g. 16× US5000 ≈ 76.8 kWh, or a mix like US2000 + US3000 + US5000) — a selector switches between "all combined" and any single battery
One-click jump to JSON, Settings, Screen Display, Update, Reboot, Reset
Pylon-Monitor×
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pylon-monitor.local
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CUSTOMIZE
Screen Display — your TFT, your layout
The physical screen's percentage is always shown, but everything else around it is up to you. Three quick presets, or tick elements individually — the live preview updates instantly, save, and the real screen matches it exactly within seconds.
Header title, voltage/current/power, charge gauge
Charging/Discharging state, SOH, cycle count, temperature
IP address and/or hostname.local footer
Fewer elements ticked? The layout re-centers itself instead of leaving empty space
Screen Display — Pylon-Monitor×
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pylon-monitor.local/display
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Just the essentials
Minimal — gauge only
Settings — Pylon-Monitor×
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pylon-monitor.local/settings
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CONFIG
One settings page — everything inside
Hostname, login, static IP, MQTT broker, REST API helper and Pushover emergency notifications. All in one form, with inline hints that show your current IP and copy-paste-ready YAML.
mDNS hostname → http://yourname.local
Static IP or DHCP reservation guidance
MQTT auto-discovery for Home Assistant
Ready-made REST YAML block (with your IP injected)
Optional Pushover push for low SOC alerts
Network — Pylon-Monitor×
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pylon-monitor.local/network
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Settings — Pylon-Monitor×
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pylon-monitor.local/settings
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Alarms — set thresholds, add Pushover, test with one click
DIAGNOSTICS
See exactly what the device is doing
No serial monitor, no guesswork. Three pages cover troubleshooting end to end, plus configurable alerts so problems reach your phone before you go looking for them.
Event log — recent activity, plus a boot history that survives crashes (kept in RTC memory, not lost on reset)
Raw data — the battery console's unparsed replies, for confirming the exact wire format
Network — WiFi signal history and a one-click gateway reachability test
Alarms — your own SOC/temperature thresholds with hysteresis, pushed via Pushover, with a one-click test
AWAY FROM HOME
A public link that works from anywhere too
The dashboard and /api.json above are LAN-only by design. Want to check your battery from the office or on a trip as well? Flip one checkbox in Settings to publish it to the cloud, for free, at a private link secured by your own access key — no VPN, no port forwarding, no dynamic DNS.
One checkbox in Settings, off by default — the device stays fully local otherwise
The same random access key that already protects /api.json from outside your LAN becomes the URL's token
Refreshed roughly every 2 minutes — not built for a live dashboard, but plenty for a phone check from the office or on the road
Turn the checkbox back off and the pushes — and the public URL — stop immediately
Settings — Pylon-Monitor×
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pylon-monitor.local/settings
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FREE CLOUD · NEW
Your whole pack online — every battery, every cell
Switch on the free Cloud and pylon-monitor.com becomes a second dashboard you can open from anywhere: the pack at a glance, then each battery and each of its cells. No subscription, and entirely optional.
Energy stored in kWh, charging or discharging, and time until full or empty
One card per battery: voltage, current, temperatures, health, cycles and its cells
Every cell of the pack on one map, lowest and highest highlighted
3 years of history, daily kWh, battery-by-battery curves and CSV export
An email if your device goes quiet — and a public JSON link for your tools
Download the .bin from the firmware page and upload it from your dashboard — it reboots straight into the new version. No cables, no soldering, no Arduino IDE. Your settings are preserved across updates.
Download the latest .bin for free from the firmware page
Upload it from the dashboard's Update firmware page — no serial cable, no Arduino IDE
Update takes ~20–30 seconds
Hostname, MQTT, static IP, login all preserved
Previous firmware kept until the new one is fully written — a power loss mid-upload can't brick it
Firmware Update — Pylon-Monitor×
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pylon-monitor.local/firmware
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api.json — Pylon-Monitor×
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pylon-monitor.local/api.json
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INTEGRATION
One JSON endpoint. Every tool speaks it.
GET /api.json hands back the entire device state in one plain HTTP call — charge, health, temperatures, per-cell voltages, network status, alarms. Add your access key (?key=…, shown in Settings) and that's it: no SDK, no vendor lock-in — it's just JSON, so anything that can make an HTTP request can use it.
Best integration
Home Assistant
Built into the firmware, both ways: MQTT auto-discovery gives you 10 sensors with zero YAML, or point the native rest platform at /api.json for 6 sensors with a YAML block the device generates for you.
Jeedom
Install the JSON plugin, point an equipment at /api.json, map paths like summary>soc or net>rssi to commands. No custom plugin needed.
Also works out of the box with Node-RED, Domoticz, openHAB, Grafana/InfluxDB — anything that parses JSON over HTTP
Refreshed live every ~4 seconds on the dashboard, all on your LAN
Stable structure — won't break between firmware versions
MAINTENANCE
Reboot & Factory Reset
Reboot is one click away in the navigation strip, with a confirmation dialog first. Factory Reset lives inside Settings' Danger zone — it wipes WiFi credentials, MQTT, alarms and sign-in, then reopens the captive portal so you can start fresh.
Confirmation dialog before either destructive action
Old firmware/settings only touched once the action is confirmed
2 quick taps in a row on the reset button (back of the enclosure) reopens the portal too — without wiping anything, for a quick WiFi change
Settings stay preserved across firmware updates
Factory reset — Pylon-Monitor×
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pylon-monitor.local/reset
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That's the whole device.
One small box, one captive portal, one dashboard, one JSON endpoint, one update button. No cloud required, no app, no subscription — €59 once.
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