Dustin C. Hatch
f99c9b5ac6
When the MQTT disconnect handler is called, it would crash the microcontroller because it was attempting to call `close` on a nil value `client`. This was supposed to have been `mqtt_client`. Immediately calling the WiFi timer callback is also a problem, as it effectively puts the microcontroller into a busy loop if the WiFi is already connected but the MQTT broker is unavailable. Adding a 1 second delay here should prevent crashing in this case.