Recalibrated power button duration, decreased long setting slightly. (#149)

Slight tuning, as I noticed sometimes inconsistent behavior (reported
>200ms of calibration value, I assume related to the Serial output).

src/CrossPointSettings.h

@@ -59,7 +59,7 @@ class CrossPointSettings {
   // Get singleton instance
   static CrossPointSettings& getInstance() { return instance; }
 
-  uint16_t getPowerButtonDuration() const { return shortPwrBtn ? 10 : 500; }
+  uint16_t getPowerButtonDuration() const { return shortPwrBtn ? 10 : 400; }
 
   bool saveToFile() const;
   bool loadFromFile();

src/main.cpp

@@ -85,7 +85,7 @@ void verifyWakeupLongPress() {
   const auto start = millis();
   bool abort = false;
   // It takes us some time to wake up from deep sleep, so we need to subtract that from the duration
-  uint16_t calibration = 25;
+  uint16_t calibration = 29;
   uint16_t calibratedPressDuration =
       (calibration < SETTINGS.getPowerButtonDuration()) ? SETTINGS.getPowerButtonDuration() - calibration : 1;
 
@@ -180,8 +180,6 @@ void setup() {
     Serial.begin(115200);
   }
 
-  Serial.printf("[%lu] [   ] Starting CrossPoint version " CROSSPOINT_VERSION "\n", millis());
-
   inputManager.begin();
   // Initialize pins
   pinMode(BAT_GPIO0, INPUT);
@@ -204,6 +202,9 @@ void setup() {
   // verify power button press duration after we've read settings.
   verifyWakeupLongPress();
 
+  // First serial output only here to avoid timing inconsistencies for power button press duration verification
+  Serial.printf("[%lu] [   ] Starting CrossPoint version " CROSSPOINT_VERSION "\n", millis());
+
   setupDisplayAndFonts();
 
   exitActivity();