From 59330768c5e5b9e32cad8554e8c8c1b41be9caf6 Mon Sep 17 00:00:00 2001
From: chrispr <chris@chrispr.org>
Date: Tue, 15 Feb 2022 20:16:27 -0500
Subject: [PATCH] Changed graph render to match nightscout; constant NTP resync
 to avoid massive clock drift during deep sleep

---
 NightscoutEInkClient.ino | 44 +++++++++++++++++++++++++++++++---------
 1 file changed, 34 insertions(+), 10 deletions(-)

diff --git a/NightscoutEInkClient.ino b/NightscoutEInkClient.ino
index 8a484bb..5d87cdd 100644
--- a/NightscoutEInkClient.ino
+++ b/NightscoutEInkClient.ino
@@ -39,6 +39,8 @@ void setup() {
   while (!Serial) { delay(10); }
   Serial.println("Nightscout CGM BS Monitor starting...");
 
+  print_wakeup_reason();
+
   ConnectToWifi();
 
   struct tm timeinfo;
@@ -101,11 +103,27 @@ void setup() {
   SleepUntilNextReading(lastSyncTime);
 }
 
+void print_wakeup_reason(){
+  esp_sleep_wakeup_cause_t wakeup_reason;
+
+  wakeup_reason = esp_sleep_get_wakeup_cause();
+
+  switch(wakeup_reason)
+  {
+    case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
+    case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
+    case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
+    case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
+    case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
+    default : Serial.printf("Wakeup was not caused by deep sleep: %d\n",wakeup_reason); break;
+  }
+}
+
 void initTime()
 {
   struct tm timeinfo;
-  if(!getLocalTime(&timeinfo))
-    configTime(0, 0, ntpServer);
+  //if(!getLocalTime(&timeinfo))
+  configTime(0, 0, ntpServer);
   while(!getLocalTime(&timeinfo)){
     Serial.println("Sleeping until time is set..");    
     delay(100);
@@ -137,7 +155,7 @@ 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 += 3;
+  secondsToSleep += 20;
   if(secondsToSleep > 0 && secondsToSleep < 300) {
     //secondsToSleep = secondsToSleep + 7;
     Serial.print("Sleeping ");
@@ -210,7 +228,10 @@ void TurnOffEPD() {
 }
 
 void SleepFiveMins() {
-  esp_sleep_enable_timer_wakeup(285 * uS_TO_S_FACTOR);
+  int secondsToSleep = 300;
+  Serial.print("Sleeping ");
+  Serial.println(secondsToSleep);
+  esp_sleep_enable_timer_wakeup(secondsToSleep * uS_TO_S_FACTOR);
   Serial.flush(); 
   TurnOffEPD();
   esp_deep_sleep_start();
@@ -220,18 +241,21 @@ void RenderGraph(JsonArray sgvRecords) {
   boolean redrawScreen = true;
   double x = 0;
   double y = 100;
-  double cnt = 0;
+  double cnt = -45;
   
-    for(JsonVariant v : sgvRecords) {
+    //for(JsonVariant v : sgvRecords) {
+    for(int i=sgvRecords.size(); i >= 0; i--) {
       
-    JsonObject obj = v.as<JsonObject>();
+    JsonObject obj = sgvRecords[i].as<JsonObject>(); //v.as<JsonObject>();
     Serial.println(obj["sgv"].as<String>());
     if(obj["device"].as<String>().indexOf("xDrip") == -1)
       continue;
-    if(cnt > 45)
+    if(cnt > 0)
       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, 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);
+  //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;
   }
 }
@@ -443,7 +467,7 @@ void Graph(ThinkInk_290_Tricolor_Z10 &d, double x, double y, double gx, double g
       d.setTextColor(tcolor, bcolor);
       d.setCursor(temp, gy + 5);
       // precision is default Arduino--this could really use some format control
-      d.println(int(i));
+      d.println(abs(int(i)));
     }
 
     //now draw the labels