90558d60b2b24ba565485b1b81bce215b135bb2b
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Commits
| Author | SHA1 | Message | Date | |
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 tajniak81andClaude Opus 5
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90558d60b2 |
What the app can set, the cloud connection can set
The broker transport could move a session along — start, stop, boost, skip the delay, cap the current — and nothing else. Everything the charger is actually configured with sat one field away in the same messages we were already decoding: the schedule it charges on, the plug lock, auto-start, the LED, load balancing, solar charging, and the Modbus server the local transport depends on. Readable, and unreachable. The obstacle was never the cloud, it was the shape of the protocol. A setting is not a register write. It is a *command*, and a command owns a set of fields inside a message type — mostly one, but five own several, and the charger reads the whole command as the new truth. A light-off schedule sent carrying only its switch is a schedule whose start and end have just been set to midnight. So a grouped write resends the siblings the caller did not name, using the values the charger itself last reported, and refuses when it has never reported them. That last part is not caution for its own sake: load balancing and solar charging carry the serial of the meter they watch, and nothing outside the charger knows it. An empty one would be adopted. Those values do not arrive with the telemetry, either. The fast 0410 stream a realtime trigger turns on carries none of them — the settings come on 0405, 0840 and 0900, which the charger sends when it has something to acknowledge. So a grouped write may have to send a trigger first purely to make the charger talk about itself, and says so plainly when even that produces nothing. Everything a caller supplies is encoded before the cloud is touched at all. A request naming one bad value changes nothing rather than half of what it asked for, and a mistyped setting costs a validation error instead of a sign-in, a certificate fetch and a broker connection to be told no. mqttsettings.go holds one table and it is the only place a setting is defined: the wire field, the name a caller uses, the state key its current value comes from, and how a value becomes bytes. The names are the snapshot's own, so a caller can read a status, change one entry and send it back. The existing limit command now builds its frame from that table too rather than encoding field a8 a second time. Reading grew to match. The frame decoder gains the fields the grouped writes must carry back — the two load-balance settings, both monitor serials, the solar monitoring mode — plus the swipe gestures, and the snapshot exposes the rest of what is now writable. One name was wrong and is corrected: field d9 was called chargingMode after the Modbus register at 20088, but the reference has it as the solar charging mode, so it becomes solarChargeMode and moves in beside the solar settings. A mislabelled reading is bad; a mislabelled writable field is worse. Over HTTP it is one action rather than a dozen, because the charger groups the fields anyway: POST .../settings with a settings object, and settings sharing a command travel in one frame instead of overwriting each other. The other two transports refuse it by name and say which one has it, the way they already refuse each other's commands. The audit trail records the values, not just that a write happened — a setting that changes what the charger will draw, or whether it answers on the LAN at all, is worth being able to trace afterwards. Two things worth saying plainly. This is built from the reference project's message maps and checked against its own frame layout, not against hardware — there is no charger on this end to point it at. And modbusEnabled is a loaded gun: writing it off stops the charger serving the register map, and the way back is this transport, or the app. The ignore rule for the local Modbus map artifact widens to the protocol maps that now sit beside it. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> |
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tajniak81andClaude Opus 5
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576df58776 |
Go the way the owner's phone already goes
Control had two transports and neither fitted the ordinary customer. OCPP waits for the charger to dial in, which needs a public endpoint it can reach, a certificate, and a firmware willing to talk to our CSMS. Modbus TCP dials the charger, which needs the server on the charger's own network. Between them they cover a charger we host and a charger we stand next to; the common case is a charger behind someone else's router, and that had nothing. It was never unreachable, though. The charger holds a connection open to Anker's own broker — it is how the mobile app drives it from anywhere, and it is the mqttStatus register the Modbus snapshot has been reporting all along. So a third control mode joins that broker as the account: get_user_mqtt_info issues a client certificate, mTLS to aiot-mqtt-eu.anker.com:8883, and commands go out on the same topics the app publishes on. Nothing on the customer's side has to be forwarded, addressed or certificated. What travels is not an API call. The payload is a JSON envelope around a base64 binary frame the device itself speaks — marker, little-endian length, message type, name/length/type/value fields, XOR checksum — so mqttframe.go is a codec rather than a client, written from the message maps in anker-solix-api and anchored on the one frame that project documents byte for byte. A frame whose fields do not tile exactly up to the checksum is refused rather than half-read: these arrive over a link we do not control, and a truncated frame must not read as a charger reporting zeros. Two of the charger's habits shape the rest. It publishes nothing unless asked, so a status read arms a telemetry trigger and waits for the next frame, and a poll inside that window answers from what has since arrived. And a broker connection costs a fetched certificate and a TLS handshake while the plugin manager builds a throwaway instance per request — so the connection lives on the account's shared session beside the auth token, for exactly the reason the token lives there, and closes itself after five idle minutes. The transport also sees two signals no other one does: the boost flag, and the plug and start countdowns. The package doc has said since the first commit that they are never set and the derived mode must do without them. Here they are set, so a charger that has been told to start and is counting down a delay says so rather than sitting in "preparing", and "skip the delay" is offered only while there is a delay to skip. The clients generalise instead of growing a second layout. Both snapshots name the same quantities the same way, so what was Modbus-only in the readouts is now whichever transport read the charger — ModbusStatus becomes ChargerStatus on the phone, mb becomes dev on the web. What each transport can be *told* still differs, and the buttons branch on that: reset and clear-limit stay with OCPP, the timeout and phase registers with Modbus, skip-delay with the cloud. A command a transport has no equivalent for is refused by name, saying which one has it. The cost is worth saying plainly. This leans on Anker's cloud being up and on an unofficial protocol the app may change under us, where Modbus leans on nothing but the LAN. And it is checked against the reference implementation's own worked example rather than against hardware — there is no charger on this end to point it at. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> |