Firmware downloads

v3.4.4 — fewer restarts, automatic once installed:

• Unexpected restarts (“Task watchdog” in the Event log). When sending to the online dashboard dragged on (weak WiFi, slow server), the device could wait up to two minutes and then restart. It now gives up after 12 seconds and simply tries again two minutes later.
• “Main loop blocked” no longer appears in the Event log for the normal time it takes to read a large stack — only for a real freeze.
• Older batteries that never report their health (for example first-generation US3000 next to a US5000): the device stops asking them at every cycle, so the rest of the stack is read faster. Their health and cycles stay shown as “—”.
• New in the JSON API and MQTT: reset_times for each battery, the number of BMS restarts reported by the battery itself.
• Access key (Settings → Public JSON access): only 8 to 32 letters and digits are accepted, as the online dashboard requires. A key with dashes or spaces could never send any data.
• New look for the device’s dashboard: clearer cards and colours, a redesigned charge history chart (smooth curve, time and value on hover or touch), a colour-coded charge state, and the full width of computer and TV screens.
• Device temperature: the temperature inside the device, with the highest ever recorded and its date, now appears on the dashboard, in the JSON API, in MQTT and in the online dashboard history.

v3.4.3 — fixes, automatic once installed:

• Screen: the volts / amps / watts at the top right no longer go blank for a moment when the battery percentage changes.
• Online dashboard that stopped receiving data (seen on large stacks): if nothing could be sent for 20 minutes while the WiFi works, the device restarts quietly by itself, at most once an hour. No data is sent to the online dashboard while a firmware update is being installed.
• Event log: every automatic restart now gives its reason, for example “Software restart (WiFi lost for 5 min)”.
• Your router’s list of connected devices now shows the device under its own name (pylon-monitor).

v3.4.2 — three fixes, all automatic once installed:

• “No battery data” although the cable is in the CONSOLE port. After a power cut, some Pylontech batteries start their console in a 1200 baud mode and answer nothing. As long as the battery stays silent, the device now sends it the wake-up command. It changes no battery setting, and a battery that already answers never receives it. Event log: “Console wake-up sent at 1200 baud”, then “Battery console answered after the 1200 baud wake-up” if that was the cause.
• WiFi stuck on 0.0.0.0 until you unplug the device. If the connection drops and does not come back on its own, the device reconnects by itself after 1 minute, then after 3 minutes, and as a last resort restarts quietly after 5 minutes — at most once every 30 minutes, so a router switched off at night causes no restart loop. A working connection is never touched. Event log: “WiFi back after … s”.
• Stacks of several batteries: SOH and cycles missing on some of them. A battery further down the stack sometimes answers the health query late. The device now waits for its complete answer and asks again once if needed. To see exactly what one battery replies, open http://<device IP>/raw?unit=7 (7 = battery number) and reload after a few minutes.

v3.4.1 — you stay signed in for a year, and every battery keeps its own identity on large packs.

• Enter your password once per browser: it is no longer asked again after a power cut, an update or a restart.
• Large and mixed packs (e.g. US5000 + US3000C): model, serial number and cycles always shown on the right battery.

Since v3.4.0 — a password is now required, as European cybersecurity rules for connected devices (EN 18031) demand.

• After the update, create your own password: there is no default password.
• REST tools (Home Assistant, Node-RED…): add ?key=… from Settings → Public JSON access. MQTT unchanged.
• Cloud data sent over HTTPS, server certificate checked.
• Forgot it? 3 presses on the reset button, or unplug the USB cable 3 times.