senddata.cpp: fix logging tag

src/senddata.cpp

@@ -1,6 +1,9 @@
 // Basic Config
 #include "senddata.h"
 
+// Local logging tag
+static const char TAG[] = __FILE__;
+
 void setSendIRQ(TimerHandle_t xTimer) {
   xTaskNotify(irqHandlerTask, SENDCYCLE_IRQ, eSetBits);
 }