Fixed graphing issue causing old data to be graphed in wrong time bucket; Handled CGM warmup; Cleaned up code

NightscoutEInkClient.ino

@@ -33,13 +33,15 @@ const char* ntpServer = "pool.ntp.org";
 #define uS_TO_S_FACTOR 1000000  /* Conversion factor for micro seconds to seconds */
 #define TIME_TO_SLEEP  5        /* Time ESP32 will go to sleep (in seconds) */
 
+RTC_DATA_ATTR int sleepCount = 0;
+
 void setup() {
   // put your setup code here, to run once:
   Serial.begin(115200);
   while (!Serial) { delay(10); }
   Serial.println("Nightscout CGM BS Monitor starting...");
-
+  
-  print_wakeup_reason();
+  //print_wakeup_reason();
 
   ConnectToWifi();
 
@@ -57,7 +59,6 @@ void setup() {
   pinMode(EPD_ENABLE, OUTPUT);
   digitalWrite(EPD_ENABLE, HIGH);
   
-  //ConnectToWifi();
   String nightscoutResponse = httpGETRequest(nightscoutUrl);
   //Serial.println(nightscoutResponse);
   DynamicJsonDocument doc(8192);
@@ -75,31 +76,20 @@ void setup() {
   display.begin();
   display.clearBuffer();
 
+  JsonVariant latestReading = array[0];
+  
+  SleepIfCGMWarmup(latestReading);
+
   RenderGraph(array);
-  RenderRightPane(array[0]);
+  RenderRightPane(latestReading);
   RenderBatteryPercentage();
 
   display.display();
 
-  String dateString = array[0]["dateString"].as<String>();
+  unsigned long long dateInt = latestReading["date"].as<unsigned long long>();
-  unsigned long long dateInt = array[0]["date"].as<unsigned long long>();
   int correctedDateInt = dateInt / 1000;
   time_t lastSyncTime = (time_t)correctedDateInt;
-  /*
+
-  Serial.println(dateInt);
-  Serial.println(correctedDateInt);
-  struct tm *lastSync;
-  //Serial.println(lastSync);
-  
-  lastSync = localtime(&lastSyncTime);
-  Serial.print("Last Sync Time ");
-  Serial.println(lastSync, "%A, %B %d %Y %H:%M:%S");
-  int lastReadInSecondsWithinTheHour = GetLastSyncTimeInSecondsWithinHour(dateString);
-  Serial.print("lastReadInSecondsWithinTheHour: ");
-  Serial.println(lastReadInSecondsWithinTheHour);
-  
-  SleepWithTimeSync(lastReadInSecondsWithinTheHour);
-  */
   SleepUntilNextReading(lastSyncTime);
 }
 
@@ -123,7 +113,10 @@ void initTime()
 {
   struct tm timeinfo;
   //if(!getLocalTime(&timeinfo))
-  configTime(0, 0, ntpServer);
+  if(sleepCount % 5 == 0) {
+    Serial.println("Syncing with NTP server..");
+    configTime(0, 0, ntpServer);
+  }
   while(!getLocalTime(&timeinfo)){
     Serial.println("Sleeping until time is set..");    
     delay(100);
@@ -141,6 +134,13 @@ int GetLastSyncTimeInSecondsWithinHour(String dateString) {
   return (minutesInTheHour * 60) + secondsInTheHour;
 }
 
+void SleepIfCGMWarmup(JsonVariant latestReading) {
+  if(latestReading["direction"].as<String>().equalsIgnoreCase("NOT COMPUTABLE")) {
+    Serial.println("CGM warmup period. Sleeping 5");
+    SleepFiveMins();
+  }
+}
+
 void SleepUntilNextReading(time_t lastReading) {
   struct tm timeinfo;
   time_t localTime;
@@ -155,7 +155,8 @@ void SleepUntilNextReading(time_t lastReading) {
   Serial.println(" seconds diff between lastReading and current time");
   int secondsToSleep = 300 - (int)timeDiff;
   //Add one more to not jump the gun
-  secondsToSleep += 20;
+  secondsToSleep += 10;
+  sleepCount++;
   if(secondsToSleep > 0 && secondsToSleep < 300) {
     //secondsToSleep = secondsToSleep + 7;
     Serial.print("Sleeping ");
@@ -169,34 +170,16 @@ void SleepUntilNextReading(time_t lastReading) {
     SleepFiveMins();
   }
 }
-void SleepWithTimeSync(int lastReadingInSeconds) {
+
-  
+unsigned long GetCurrentEpochTime() {
-  //configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
   struct tm timeinfo;
+  time_t localTime;
+  
   if(!getLocalTime(&timeinfo)){
-    Serial.println("Failed to obtain time");
+    Serial.println("Error getting local time");
-    SleepFiveMins();
   }
-  //Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+  localTime = mktime(&timeinfo);
-  
+  return (unsigned long)localTime;
-  int secondsInTheHour = (timeinfo.tm_min * 60) + timeinfo.tm_sec;
-  Serial.print("currentSecondsWithinTheHour");
-  Serial.println(secondsInTheHour);
-  int secondsToSleep = 300 - (secondsInTheHour - lastReadingInSeconds);
-  Serial.print("Would like to sleep ");
-  Serial.println(secondsToSleep);
-  if(secondsToSleep > 0 && secondsToSleep < 300) {
-    //buffer for new processing
-    secondsToSleep = secondsToSleep + 7;
-    esp_sleep_enable_timer_wakeup(secondsToSleep * uS_TO_S_FACTOR);
-    Serial.flush(); 
-    TurnOffEPD();
-    esp_deep_sleep_start();
-  }
-  else {
-    SleepFiveMins();
-  }
-  
 }
 
 void RenderBatteryPercentage() {
@@ -241,22 +224,28 @@ void RenderGraph(JsonArray sgvRecords) {
   boolean redrawScreen = true;
   double x = 0;
   double y = 100;
-  double cnt = -45;
+  int cnt = -45;
-  
+
-    //for(JsonVariant v : sgvRecords) {
+  //Get 46 minutes into the past, to filter out older records
-    for(int i=sgvRecords.size(); i >= 0; i--) {
+  unsigned long timeCutoff = GetCurrentEpochTime() - (46 * 60);
-      
+
+  for(int i=sgvRecords.size(); i >= 0; i--) {
+    
     JsonObject obj = sgvRecords[i].as<JsonObject>(); //v.as<JsonObject>();
     Serial.println(obj["sgv"].as<String>());
-    if(obj["device"].as<String>().indexOf("xDrip") == -1)
+    if(obj["device"].as<String>().indexOf("xDrip") == -1) {
       continue;
+    }
     if(cnt > 0)
       continue;
+    unsigned long readingTime = (unsigned long)(obj["date"].as<unsigned long long>() / 1000);
+    Serial.printf("readingTime: %d\n", readingTime);
+    if(readingTime < timeCutoff)
+      continue;
 
-  //Graph(display, cnt, obj["sgv"].as<double>(), 20, 110, 210, 105, 0,45, 5,60,180,10,"", "", "", COLOR1, COLOR1, COLOR2, COLOR1, COLOR0, redrawScreen);
+    Graph(display, cnt, obj["sgv"].as<double>(), 20, 110, 210, 105, -45,0, 5,60,180,10,"", "", "", COLOR1, COLOR1, COLOR2, COLOR1, COLOR0, redrawScreen);
-  Graph(display, cnt, obj["sgv"].as<double>(), 20, 110, 210, 105, -45,0, 5,60,180,10,"", "", "", COLOR1, COLOR1, COLOR2, COLOR1, COLOR0, redrawScreen);
+    Serial.printf("Graphing x: %+d y: %f\n", cnt, obj["sgv"].as<double>());
-  //GraphReversed(display, cnt, obj["sgv"].as<double>(), 20, 110, 210, 105, 0,45, 5,60,180,10,"", "", "", COLOR1, COLOR1, COLOR2, COLOR1, COLOR0, redrawScreen);
+    cnt += 5;
-  cnt += 5;
   }
 }
 
@@ -307,10 +296,6 @@ void RenderRightPane(JsonVariant sgvRecord) {
     
   display.print(delta);
 
-  //display.setCursor(235, 70);
-  //display.setTextSize(3);
-  //display.setTextColor(COLOR1);
-  //display.drawChar(235, 60, 0x1A, COLOR1, COLOR0, 3);
   RenderTrendArrow(sgvRecord["direction"].as<String>());
 
   //time