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--- amc2020:group_n:deepsleep [2020/07/27 17:51] – [3.2 The Code Explained] jonas001
+++ amc2020:group_n:deepsleep [2021/08/24 17:35] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
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 ====== ESP32 Deep Sleep Mode ======
@@ Line 74: / Line 84: @@
     <ol>
         <li>
-            After including the <b><font face="Courier New"><font style="color:CD5307">Wire</font>.h</font> </b> library for I2C communication and defining the DS3231 I2C address as <b><font face="Courier New">0x68</font></b>, the I2C pins of the ESP32 need to be defined. By default SCL is GPIO 22 and SDA is GPIO 21, but it is possible to use almost all pins for I2C communication if done correctly. Here just the default pins are used.
+            After including the <b><font face="Courier New"><font style="color:#CD5307">Wire</font>.h</font> </b> library for I2C communication and defining the DS3231 I2C address as <b><font face="Courier New">0x68</font></b>, the I2C pins of the ESP32 need to be defined. By default SCL is GPIO 22 and SDA is GPIO 21, but it is possible to use almost all pins for I2C communication if done correctly. Here just the default pins are used.
         </li>
         <li>
-            The function <b><font face="Courier New">clearAlarm1()</font></b> must also be copied into the new sketch.
+            The function <b><font face="Courier New">clearAlarm1()</font></b> is the only one, that must be copied into the new sketch.
         </li>
         <br>
         <li>
-            When using the <b><font face="Courier New"><font style="color:CD5307">Wire</font>.<font style="color:CD5307">begin</font>()</font></b> method to start the I2C bus, the I2C pins previously defined need to be given as argument.
+            When using the <b><font face="Courier New"><font style="color:#CD5307">Wire</font>.<font style="color:#CD5307">begin</font>()</font></b> method to start the I2C bus, the I2C pins previously defined need to be given as argument.
         </li>
         <li>
@@ Line 99: / Line 109: @@
         </li>
     </ol>
+</html>
+==== 3.3 Results ====
+Apart from the timestamps on the left, the result in the serial monitor should look like this. In the data that the ESP32 prints by itself, it can be seen that the reset occured due to waking up from deep sleep (1). Furthermore, the last serial print command was not executed because deep sleep was activated before that could happen.
+When comparing the time stamps (1, 3 and 4) it becomes visible that the wake up from deep sleep occurred always 1 minute after the last wake up. However, the milliseconds are always varying a little bit. This might be due to the temperature compensation of the DS3231 through which the capacitance and therefore the frequency of the oscillator are changed. So, there might be very small inaccuracies, but they are constantly compensated for by the module, such that the total drift stays very low.
+<code>
+:50:42.643 -> ets Jun  8 2016 00:22:57
+:50:42.643 ->
+:50:42.643 -> rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) //1
+:50:42.643 -> configsip: 0, SPIWP:0xee
+:50:42.643 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
+:50:42.643 -> mode:DIO, clock div:1
+:50:42.643 -> load:0x3fff0018,len:4
+:50:42.643 -> load:0x3fff001c,len:1216
+:50:42.643 -> ho 0 tail 12 room 4
+:50:42.643 -> load:0x40078000,len:10864
+:50:42.643 -> load:0x40080400,len:6432
+:50:42.643 -> entry 0x400806b8
+:50:43.793 -> ESP32 woke up from deep sleep.
+:50:43.793 -> Going back to sleep in 3
+:50:44.783 -> Going back to sleep in 2
+:50:45.743 -> Going back to sleep in 1
+:50:46.743 -> Going back to sleep in 0                                  //2
+:51:42.633 -> ets Jun  8 2016 00:22:57                                  //3
+:51:42.633 ->
+:51:42.633 -> rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
+:51:42.633 -> configsip: 0, SPIWP:0xee
+:51:42.633 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
+:51:42.633 -> mode:DIO, clock div:1
+:51:42.633 -> load:0x3fff0018,len:4
+:51:42.633 -> load:0x3fff001c,len:1216
+:51:42.633 -> ho 0 tail 12 room 4
+:51:42.633 -> load:0x40078000,len:10864
+:51:42.633 -> load:0x40080400,len:6432
+:51:42.633 -> entry 0x400806b8
+:51:43.782 -> ESP32 woke up from deep sleep.
+:51:43.782 -> Going back to sleep in 3
+:51:44.763 -> Going back to sleep in 2
+:51:45.753 -> Going back to sleep in 1
+:51:46.763 -> Going back to sleep in 0
+:52:42.653 -> ets Jun  8 2016 00:22:57                                  //4
+:52:42.653 ->
+:52:42.653 -> rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
+:52:42.653 -> configsip: 0, SPIWP:0xee
+:52:42.653 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
+:52:42.653 -> mode:DIO, clock div:1
+:52:42.653 -> load:0x3fff0018,len:4
+:52:42.653 -> load:0x3fff001c,len:1216
+:52:42.653 -> ho 0 tail 12 room 4
+:52:42.653 -> load:0x40078000,len:10864
+:52:42.653 -> load:0x40080400,len:6432
+:52:42.653 -> entry 0x400806b8
+:52:43.753 -> ESP32 woke up from deep sleep.
+:52:43.753 -> Going back to sleep in 3
+:52:44.753 -> Going back to sleep in 2
+:52:45.793 -> Going back to sleep in 1
+:52:46.783 -> Going back to sleep in 0
+</code>
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