make thresholds dynamic (on startup)

src/keyboard.cpp

@@ -60,7 +60,13 @@ void Keyboard::init() {
     touch_pad_read((touch_pad_t)i, &touch_value);
     Serial.println(touch_value, DEC);
   }
-  // set thresholds // ToDo: don't hardcode thresholds
+  // set thresholds // ToDo: what if someone touches something on startup?
+  uint16_t touch_value;
+  for (int i=0; i<TOUCH_PAD_NUM; i++) {
+    touch_pad_read((touch_pad_t)i, &touch_value);
+    touch_pad_config((touch_pad_t)i, touch_value/2);
+  }
+/*
   threshold[0] = 50;
   threshold[1] = 0;
   threshold[2] = 0;
@@ -72,6 +78,7 @@ void Keyboard::init() {
   threshold[8] = 50;
   threshold[9] = 50;
   for (int i=0; i<TOUCH_PAD_NUM; i++) touch_pad_config((touch_pad_t)i, threshold[i]);
+*/
 
   // interrupt handler
   touch_pad_isr_handler_register(tp_example_rtc_intr, NULL, 0, NULL);