Merge pull request #33 from bsatrom/feature/fermentation-time

display fermentation time; closes #29

Author: Brandon Satrom

brew-buddy-firmware/src/brew-buddy-firmware.ino

@@ -150,7 +150,7 @@ void loop()
         tft.setTextColor(ILI9341_WHITE);
 
         displayFermentationHeading();
-        // TODO: print delta btw mode start and fermentation start
+        displayFermentationModeDelta();
 
         waitUntil(Particle.connected);
         Particle.publish("fermentation/state", "start");
@@ -418,12 +418,22 @@ void displayStageName(String stagename)
 
 void displayFermentationHeading()
 {
-  tft.setCursor(0, 40);
+  tft.setCursor(0, 100);
   tft.setTextSize(2);
   tft.println("Fermentation Rate");
   tft.println("(in seconds)");
 }
 
+void displayFermentationModeDelta()
+{
+  unsigned long fermentationDelta = fermentationStartTime - fermentationModeStartTime;
+
+  tft.setCursor(0, 40);
+  tft.setTextSize(2);
+  tft.println("Time to fermentation (hours)");
+  tft.println(fermentationDelta / 36000000.00);
+}
+
 void displayTimeHeading()
 {
   tft.setCursor(0, 120);