Fix WDT boot loop again: Arduino interrupt dispatcher overhead is too high for 500kHz even with direct GPIO writes. Reverted to stable 100kHz.

Made-with: Cursor

include/config.h

@@ -36,10 +36,9 @@
 #define JAM_FREQ_DEV_KHZ 380.0f        // default passed to begin(); per-radio deviation applied after init
 #define JAM_RX_BW_KHZ    812.0f        // wide RX BW for begin()
 // GDO0 toggle rate during jam.
-// Restored to 500 kHz. Direct register writes (GPIO.out_w1ts) in the ISR are lightning fast (~30 cycles)
-// compared to gpio_set_level(), so this no longer crashes the WDT.
-// 500 kHz LFSR creates massive, dense noise blanketing the entire 314–316 MHz and 433–433.92 MHz bands.
-#define JAM_LFSR_KEY_HZ    500000
+// 100 kHz (10 µs period) gives plenty of LFSR noise (AM sidebands at ±100, ±300, ±500 kHz)
+// and leaves enough CPU time for the Arduino interrupt dispatcher to avoid WDT boot-loops.
+#define JAM_LFSR_KEY_HZ    100000
 
 // Fixed dual-carrier jamming: each radio holds one frequency at full TX power (TI CC1101 freq + deviation).
 // Many NA ~315 MHz RKE remotes are ASK/OOK (see TI CC1101 datasheet MDMCFG2.MOD_FORMAT). Jam path uses OOK on