Minor refactoring.

src/wordclock_esp8266.cpp

@@ -323,19 +323,22 @@ void loop()
 
 void update_state_machine()
 {
-    if (state_auto_change && (millis() - last_state_change > PERIOD_STATE_CHANGE) && !night_mode)
+    unsigned long current_time = millis();
+
+    if (state_auto_change && (current_time - last_state_change > PERIOD_STATE_CHANGE) && !night_mode)
     {
         // increment state variable and trigger state change
         state_change((current_state + 1) % NUM_STATES);
         // save last automatic state change
-        last_state_change = millis();
+        last_state_change = current_time;
     }
 }
 
 void handle_current_state()
 {
-    // handle mode behaviours (trigger loopCycles of different modes depending on current mode)
     unsigned long current_time = millis();
+
+    // handle mode behaviours (trigger loopCycles of different modes depending on current mode)
     if (!night_mode && ((current_time - last_step) > PERIODS[state_auto_change][current_state]) && ((current_time - last_led_direct) > TIMEOUT_LEDDIRECT))
     {
         switch (current_state)
@@ -426,6 +429,7 @@ void handle_current_state()
 void update_matrix()
 {
     unsigned long current_time = millis();
+
     // periodically write colors to matrix
     if ((current_time - last_animation_step) > PERIOD_MATRIX_UPDATE)
     {
@@ -442,6 +446,7 @@ void update_matrix()
 void send_heartbeat()
 {
     unsigned long current_time = millis();
+
     // send regularly heartbeat messages via UDP multicast
     if ((current_time - last_heartbeat) > PERIOD_HEARTBEAT)
     {
@@ -467,6 +472,7 @@ void send_heartbeat()
 void check_night_mode()
 {
     unsigned long current_time = millis();
+
     // check if nightmode need to be activated
     if ((current_time - last_nightmode_check) > PERIOD_NIGHTMODE_CHECK)
     {
@@ -493,6 +499,7 @@ void check_night_mode()
 void ntp_time_update()
 {
     unsigned long current_time = millis();
+
     // NTP time update
     if ((current_time - last_ntp_update) > PERIOD_NTP_UPDATE)
     {
@@ -620,8 +627,7 @@ void state_change(uint8_t newState)
 {
     if (night_mode)
     {
-        // deactivate Nightmode
-        set_night_mode(false);
+        set_night_mode(false); // deactivate Nightmode
     }
     // first clear matrix
     led_matrix.flush();
@@ -686,6 +692,7 @@ void handle_button()
 {
     static bool lastButtonState = false;
     bool buttonPressed = !digitalRead(BUTTON_PIN);
+
     // check rising edge
     if (buttonPressed == true && lastButtonState == false)
     {