TankSync v3.6.2

Receiver (hub) reliability + UX. Transmitter unchanged (version bumped in lockstep).

Fixes

• Data-loss guard (important): the hub could publish an empty tank manifest after a failed storage read (SPIFFS/OOM/corruption at boot), which the cloud honored by deleting all of a user's tanks. The registry now distinguishes "couldn't read" from "genuinely empty" and withholds the manifest when a load fails — so a transient read error can never wipe your tanks. Legitimate empties (first boot, factory reset, removing your last tank) are unaffected.
• OTA ring animation now actually runs. The full-ring update animation was gated on a status flag that was never set, so it had never displayed on any hub. It now shows during updates.

New

• Whole-ring status animations on the LED ring/strip, each a distinct colour: hub update = orange comet, transmitter update = magenta comet, pairing = cyan comet, first-time setup = blue breathing. Normal tank gauges are unchanged.

Also

• Transmitter: sensor +5V power gate is deferred past boot so sensor inrush can no longer brown out the ESP on battery (carried from the prior fix).

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Downloads (every variant for this firmware version)

Transmitter — ESP32-C3 SuperMini

• …-transmitter-lora-esp32c3-<tag>.bin — LoRa SKU (RYLR998 module)
• …-transmitter-lite-espnow-esp32c3-<tag>.bin — Lite SKU (ESP-NOW, built-in radio, no module)

Receiver / Hub

• …-receiver-esp32-<tag>.bin — ESP32 DevKit
• …-receiver-esp32s3-<tag>.bin — ESP32-S3 SuperMini

Each variant ships two images:

• plain .bin — OTA app image, flash at 0x10000, or use the one-click browser flasher / in-app OTA.
• …-full.bin — full-flash image for a fresh/blank board, flash at 0x0 with esptool: esptool.py write_flash 0x0 <file>-full.bin.