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This is not so much a question as an observation. The pin assignments for the chipKIT boards can be the source of considerable confusion. With respect to the WF32, the on-board LEDs are labeled in the reference manual as LED3 through LED6. Normally the file "mpide\hardware\pic32\variants\WF32\Boards_Defs.h" maps these pins to chipKIT PIN_LED4 through LED1 (note the reverse order). To further add to the confusion, the WF32 Reference Manual incorrectly states on page 7, "In addition to the connector pin, Pin 13 also connects to the user LED LD3". The connection should be LED LD6 as correctly stated in Section 10.7 on page 12, The Pinout Table on pages 14 also correctly associates chipKIT Pin 13 with LD6. I revised my version of the Boards_DEF.h under the WF32 definitions to add the following define statements so the LD designations match thoes on the WF32 documentation: // #define PIN_LED3 48 - redefined below // #define PIN_LED4 47 - redefined below /* WF32 board LED lables */ #define PIN_LED6 13 #define PIN_LED5 43 #define PIN_LED4 48 #define PIN_LED3 47 Board_Defs.h