From b8a0e8ec8191205f7979b20b4d38012f58edbb4c Mon Sep 17 00:00:00 2001
From: Ralf Behrens <Ralf.Behrens@hse-electronics.com>
Date: Tue, 18 Jan 2022 11:21:55 +0100
Subject: [PATCH] =?UTF-8?q?PowerSave=20=C3=BCber=20RTC=20Alarm?=
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---
 include/MessenSensoren.h |  3 +-
 src/MessenSensoren.cpp   | 79 ++++++++++++++++++++++++++++++++++++++++
 src/main.cpp             | 42 +++++++++++++++------
 3 files changed, 111 insertions(+), 13 deletions(-)

diff --git a/include/MessenSensoren.h b/include/MessenSensoren.h
index e1c10a5..85b2a07 100644
--- a/include/MessenSensoren.h
+++ b/include/MessenSensoren.h
@@ -8,7 +8,8 @@ void PrintTimeDate(void);
 int16_t readVcc(void);
 void init_Messen(void);
 void MessenSensoren(void);
-
+void PowerDown(void);
+void PowerUp(void);
 
 
 // nicht schoen aber funktioniert
diff --git a/src/MessenSensoren.cpp b/src/MessenSensoren.cpp
index 406aaa0..756d05f 100644
--- a/src/MessenSensoren.cpp
+++ b/src/MessenSensoren.cpp
@@ -214,3 +214,82 @@ void MessenSensoren() {
     hse.addVoltage(fUb/1000.0);  // in Volt
     hse.addCounter(uiOnStd);    // Zeit On
 }
+
+//-----------------------------------------
+//
+//-----------------------------------------
+void PowerDown(void)
+{ 
+ pinMode(LED1, OUTPUT);
+ digitalWrite(LED1, LOW);   // LED aus
+
+/*
+ // IOs 
+ //pinMode(0, INPUT_PULLUP);     // 2,4mA
+ pinMode(0, INPUT_PULLDOWN);     // 2,39mA
+ // 1 = TxD
+ pinMode(2, INPUT_PULLDOWN);     // ==
+ // 3 = DIO0
+ // 4 = Reset RF96
+ // 5 = Power_I2C
+ digitalWrite(I2C_POWER, LOW);   // 3V Power Pin
+ // 6 = DIO1
+ pinMode(6, INPUT_PULLDOWN);     // 
+ // 7 = 
+ pinMode(7, INPUT_PULLDOWN);     // 2,39mA
+ // 8 = NSS
+ // 9 = A7 = Ubatt Sensor
+ // 10 = 
+ pinMode(10, INPUT_PULLDOWN);     // 
+ // 11 = 
+ pinMode(11, INPUT_PULLDOWN);     // 
+ // 12 = 
+ pinMode(12, INPUT_PULLDOWN);     // 
+ // 13 = LED1
+ digitalWrite(LED1, LOW);   // LED aus
+ // 2,39mA
+ //-----------
+ // 14 = A0
+ pinMode(14, INPUT_PULLDOWN);     // =
+ // 15 = A1
+ pinMode(15, INPUT_PULLDOWN);     // ==
+  // 16 = A2
+ pinMode(16, INPUT_PULLDOWN);     // =
+  // 17 = A3
+ pinMode(17, INPUT_PULLDOWN);     // =
+  // 18 = A4
+ pinMode(18, INPUT_PULLDOWN);     // =
+  // 19 = A5
+ pinMode(19, INPUT_PULLDOWN);     // =
+ // 19 = A5
+ pinMode(19, INPUT_PULLDOWN);     // =
+ // 20 = SDA
+ pinMode(20, INPUT_PULLDOWN);     // =
+ // 21 = SCL
+ pinMode(21, INPUT_PULLDOWN);     // 2,38mA
+//---------------------
+// 22 = MISO
+// 23 = MOSI
+// 24 = SCK
+ for (int i=25;i<30;i++) pinMode(i, INPUT_PULLDOWN);    // 
+// => 2,38mA
+ 
+//myRFM_setModeSleep(); 
+   */
+  
+} 
+//-------------------------------------------------
+//------------------------------------------------------------------- 
+void PowerUp(void)
+{
+int i;  
+
+// I2C Power einschalten LoRa Transponder
+pinMode(I2C_POWER,OUTPUT); 
+digitalWrite(I2C_POWER, HIGH);
+delay(10);
+Wire.begin();
+
+}
+
+//---------------------------------------------------
diff --git a/src/main.cpp b/src/main.cpp
index 43c9861..705a08d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -37,9 +37,12 @@
 #include <lmic.h>
 #include <hal/hal.h>
 #include <SPI.h>
+#include <Wire.h>
+#include <RTCZero.h>
 #include "hseSensorProtocol.h"
 #include "MessenSensoren.h"
-#include "ArduinoLowPower.h"
+
+RTCZero rtc;
 
 // This EUI must be in little-endian format, so least-significant-byte
 // first. When copying an EUI from ttnctl output, this means to reverse
@@ -228,20 +231,27 @@ void onEvent(ev_t ev) {
                 }
                 Serial1.println(F(""));
             }
-            // Schedule next transmission
-            os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(TX_INTERVAL), do_send);
-            Serial1.print(F("WasTustDu="));
-            Serial1.println(WasTustDu);
-            WasTustDu++;
             PrintTimeDate();
 
             //Serial1.println(F("vor sleep"));
-            //Serial1.flush();
+            Serial1.flush();
+
+            // Sleep for a period of TX_INTERVAL using single shot alarm
+            rtc.setAlarmEpoch(rtc.getEpoch() + TX_INTERVAL);
+            rtc.enableAlarm(rtc.MATCH_YYMMDDHHMMSS);
+            rtc.attachInterrupt(alarmMatch);
             
-            //LowPower.sleep((uint32_t) (TX_INTERVAL-10)*1000);     // bis kurz vor dem Ereignis schlafen    
-            //LowPower.sleep(1000);     // ich will wissen wie häufig er hier vorbei kommt
-                
+            PowerDown();
+            // Enter sleep mode
+            rtc.standbyMode();
+      
             //Serial1.println(F("wieder aufgewacht"));  // => er wacht nicht wieder auf
+            PowerUp();
+
+            // Schedule next transmission to be immediately after this
+            os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(1), do_send);
+
+
 
             break;
         case EV_LOST_TSYNC:
@@ -297,9 +307,13 @@ void setup() {
     USBDevice.detach();
 
     Serial1.begin(19200);
-    Serial1.println(F("Starting 1.04"));
+    Serial1.println(F("Starting 1.05"));
     Serial1.println(F(__FILE__));
     Serial1.println(F(__DATE__));
+  // Initialize RTC
+  rtc.begin();
+  // Use RTC as a second timer instead of calendar
+  rtc.setEpoch(0);
 
 
 #ifdef __SAMD21G18A__
@@ -323,7 +337,7 @@ void setup() {
     os_init();
     // Reset the MAC state. Session and pending data transfers will be discarded.
     LMIC_reset();
-
+  LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100);
     LMIC_setLinkCheckMode(0);
     LMIC_setDrTxpow(DR_SF7, 6);
     //LMIC_selectSubBand(1);
@@ -338,4 +352,8 @@ void loop() {
 
 }
 
+void alarmMatch()
+{
+
+}