576df58776dc0d106b1535cf13b7d9acf1fa0a90
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Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 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> |