The sensor binding survives a restart

Author: pschroee

docs/TFA-Marbella.md

@@ -51,7 +51,7 @@ Command|Parameters
 :---|:---
 Marbella|Show the bound sensor id and the reception state<br>`<id>` = bind to one sensor, id as six hex digits, e.g. `683f16`<br>`0` = forget the binding and learn the next sensor seen
 
-The binding is not stored in settings and therefore does not survive a restart - the driver simply learns again. Use `TFA_MARBELLA_SERIAL` to fix it at compile time.
+The binding is stored and survives a restart, so the receiver cannot bind itself to a neighbour's sensor while yours happens to be quiet. `TFA_MARBELLA_SERIAL` sets it at compile time instead.
 
 [`SetOption166`](Commands#setoption166) additionally publishes each reading as it arrives instead of leaving it to `TelePeriod`. Useful here, because the sensor transmits about once a minute while the default `TelePeriod` is 300 seconds.