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Update PWM.md

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@ -92,7 +92,9 @@ The following PWM resources are available:
HomeSpan *automatically* allocates Channels and Timers to LedPin and ServoPin objects as they are instantiated. Every pin assigned consumes a single Channel; every *unique* frequency specified among all channels (within the same set, for the ESP32) consumes a single Timer. HomeSpan will conserve resources by re-using the same Timer for all Channels operating at the same frequency. *HomeSpan also automatically configures each Timer to support the maximum duty-resolution possible for the frequency specified.*
HomeSpan will report a non-fatal error message to the Arduino Serial Monitor when insufficient Channel or Timer resources prevent the creation of a new LedPin or ServoPin object. Calls to the `set()` method for objects that failed to be properly created are silently ignored.
#### Diagnostic Messages
The **LedPin** and **ServoPin** classes output *Information \[I\]* and *Warning \[W\]* messages to the Serial Monitor based on the *Core Debug Level* selected when compiling the sketch using the Arduino IDE. A non-fatal warning message is produced when insufficient Channel or Timer resources prevent the creation of a new LedPin or ServoPin object. Calls to the `set()` method for objects that failed to be properly created are silently ignored.
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