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Update Extras.md

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@ -62,11 +62,17 @@ The *minMicros* parameter must be less than the *maxMicros* parameter, but setti
A worked example showing how ServoPin can be used to control the Horizontal Tilt of a motorized Window Shade can be found in the Arduino IDE under [*File → Examples → HomeSpan → Other Examples → ServoControl*](../Other%20Examples/ServoControl). A worked example showing how ServoPin can be used to control the Horizontal Tilt of a motorized Window Shade can be found in the Arduino IDE under [*File → Examples → HomeSpan → Other Examples → ServoControl*](../Other%20Examples/ServoControl).
Resource limitations: ### PWM Resource Allocation and Limitations
* ESP32: 16 PWM Channels The following PWM resources are available:
HomeSpan will report a non-fatal error message to the Arduino Serial Monitor for each LedPin or ServoPin that instantiated beyond these limits. Calls to the `set()` method for objects that exceed these limits are ignored. * ESP32: 16 Channels / 8 Timers (arranged in two distinct sets of 8 Channels and 4 Timers)
* ESP32-S2: 8 Channels / 4 Timer
* ESP32-C3: 6 Channels / 4 Timers
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. HoneSpan 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.
## Remote Control Radio Frequency / Infrared Signal Generation ## Remote Control Radio Frequency / Infrared Signal Generation