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J. Nick Koston
a84269d6b0
An idle GATT client slot has its loop disabled, so the stack-down reset in loop() never runs across a ble.disable/ble.enable cycle. The slot keeps the gattc interface of the torn-down stack and never registers again; the next esp_ble_gattc_open on that interface is dropped by Bluedroid without any event and the slot stays in CONNECTING forever, which also blocks scanning. Give ESPBTClient a before-disabled hook, fan it out from the tracker's existing handler, and have both client implementations settle any link, go back to INIT and enable their loop so they register on the new stack. The Bluedroid backend also refuses to open on an unregistered interface instead of waiting for an event that cannot come.
