add information (like atis)

templog.ino

@@ -13,13 +13,22 @@
 #define ODD 1
 #define EVEN 2
 
+#define TEMP_UNDEFINED -99
+
+#define DELAY 600000 // 10 minutes
+//#define DELAY 5000 // 5 seconds
+
 OneWire oneWire( ONE_WIRE_BUS );
 DallasTemperature DS18B20( &oneWire );
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C display(U8G2_R0);
 
 
 int status = STATUS_OK;
-int oddEvenLoop = ODD;
+char ident[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
+int curIdent = 0;
+
+float tempMin = TEMP_UNDEFINED;
+float tempMax = TEMP_UNDEFINED;
 
 void setup() {
   Serial.begin(115200);
@@ -32,13 +41,21 @@ void setup() {
 }
 
 void loop() {
-  char tempStr[6];
+  char tempStr[8], tempHeadStr[16];
   long uptimeSec = millis() / 1000;
 
   DS18B20.requestTemperatures();
-  float tempFl = DS18B20.getTempCByIndex(0);
+  float temp = DS18B20.getTempCByIndex(0);
 
-  dtostrf(tempFl, 4, 1, tempStr);
+  if (temp < tempMin || tempMin == TEMP_UNDEFINED) {
+    tempMin = temp;
+  }
+  if (temp > tempMax || tempMax == TEMP_UNDEFINED) {
+    tempMax = temp;
+  }
+
+  sprintf(tempStr, "%0.1f", temp);
+  sprintf(tempHeadStr, "L %0.1f H %0.1f %c", tempMin, tempMax, ident[curIdent]);
 
   Serial.print(uptimeSec);
   Serial.print(": ");
@@ -55,13 +72,7 @@ void loop() {
       break;
     case STATUS_OK:
     default:
-      if (oddEvenLoop == ODD) {
-        display.drawStr(0, 11, "Temperatur *");
-        oddEvenLoop = EVEN;
-      } else {
-        display.drawStr(0, 11, "Temperatur #");
-        oddEvenLoop = ODD;
-      }
+      display.drawStr(0, 11, tempHeadStr);
   }
   display.setFont(u8g2_font_fub42_tn);
   display.drawStr(8, 63, tempStr);
@@ -72,6 +83,8 @@ void loop() {
     if (fd) {
       fd.print(uptimeSec);
       fd.print(";");
+      fd.print(ident[curIdent]);
+      fd.print(";");
       fd.println(tempStr);
       fd.close();
       status = STATUS_OK;
@@ -79,6 +92,11 @@ void loop() {
       status = STATUS_SD_WRITE_FAILED;
     }
   }
+
+  curIdent++;
+  if (curIdent >= sizeof(ident)) {
+    curIdent = 0;
+  }
   
-  delay(5000);
+  delay(DELAY);
 }