make summer mode do something, update readme

main/fancontrol.c

@@ -98,9 +98,11 @@ static void timerCallback()
     cels_t tin = act_temp1();
     cels_t tout = act_temp2();
 
+    uint16_t old_tempSerial = gState.tempSerial;
     float old_tin = gState.t_actual_in;
     float old_tout = gState.t_actual_out;
 
+    gState.tempSerial = act_temps_serial();
     gState.t_actual_in = tin;
     gState.t_actual_out = tout;
 
@@ -216,7 +218,7 @@ static void timerCallback()
                             // Max time elapsed, switch even if the condition was not reached
                             do_switch = true;
                         } else {
-                            if (gState.lastTempsSerial != act_temps_serial()) {
+                            if (!gSettings.summer_mode && gState.tempSerial != old_tempSerial) {
                                 // expecting some change in temps
                                 float speed;
                                 if (gState.real_direction == MOTOR_DIR_IN) {

main/fancontrol.h

@@ -54,7 +54,7 @@ struct FanControlState {
     cels_t t_inflow;
     cels_t t_exhaust;
 
-    uint16_t lastTempsSerial;
+    uint16_t tempSerial;
     cels_t t_actual_in;
     cels_t t_actual_out;