From 82bcd247f41ce582eea81a90c506aaedd946828a Mon Sep 17 00:00:00 2001
From: Hendrik Langer <hendrik+dev@xd0.de>
Date: Sun, 4 Feb 2018 16:20:26 +0100
Subject: [PATCH] initial deep sleep code

---
 src/hardware.h | 14 ++++++++++----
 src/main.cpp   | 46 +++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 53 insertions(+), 7 deletions(-)

diff --git a/src/hardware.h b/src/hardware.h
index e2dfb1a..26cfb60 100644
--- a/src/hardware.h
+++ b/src/hardware.h
@@ -2,11 +2,17 @@
 #define _HARDWARE_H
 
 /* pin assignments */
+// LED_BUILTIN = 2
+// KEY_BUILTIN = 0
 static constexpr uint8_t buttonPin = 0;
 static constexpr uint8_t sensorPin = 0;
 static constexpr uint8_t rotaryPinA = 39;
 static constexpr uint8_t rotaryPinB = 38;
 static constexpr uint8_t rotaryPinButton = 22;
+static constexpr uint8_t ext_wakeup_pin_1 = 0;
+static constexpr uint8_t ext_wakeup_pin_2 = 0;
+
+static constexpr uint32_t secondsToSleep = 3600;
 
 
 /* Wiring (Heltec OLED Lora)
@@ -14,17 +20,17 @@ static constexpr uint8_t rotaryPinButton = 22;
  *               5V O                    O 5V
  *              3V3 O                    O 3V3
  *              GND O                    < 36           only input, no pullups
- *               RX *                 ?  * 17
- *               TX *                    < 38 ROTARY_A  only input, no pullups
+ *               RX * (3)             ?  * 17
+ *               TX * (1)                < 38 ROTARY_A  only input, no pullups
  *              RST * BUTTON             < 39 ROTARY_B  only input, no pullups
- *                0 * BUTTON             < 34           only input, no pullups
+ *                0 * KEY_BUILTIN        < 34           only input, no pullups
  * ROTARY_BTN    22 *                    < 35           only input, no pullups
  * BME280_SDO    19 * LoRa_MISO       ?  * 32
  * BME280_CS     23 *                 ?  * 33
  *               18 x LoRa_CS            * 25 MAX98_DIN
  * BME280_SCL/SCK 5 * LoRa_SCK  LoRa_IRQ * 26
  *               15 * OLED_SCL LoRa_MOSI * 27 BME280_SDA/SDI
- *                2 *           LoRa_RST * 14
+ *                2 * LED_B     LoRa_RST * 14
  *                4 * OLED_SDA           * 12 MAX98_BCLK
  *               17 *                    * 13 MAX98_LRC
  *               16 * OLED_RST           * 21
diff --git a/src/main.cpp b/src/main.cpp
index a77739c..1be0329 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -27,14 +27,16 @@
 
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ 16, /* clock=*/ 15, /* data=*/ 4);
 
+
+char timeStr[20];
+char weatherStr[32];
+RTC_DATA_ATTR static int boot_count = 0;
+
 //Create a new Basecamp instance called iot
 Basecamp iot;
 
 WiFiUDP ntpUDP;
 NTPClient timeClient(ntpUDP, "de.pool.ntp.org", 3600, 60000);
-char timeStr[20];
-char weatherStr[32];
-
 BME280 bme280;
 MP3 mp3;
 Rotary rotary;
@@ -56,6 +58,37 @@ void setup() {
   pinMode(18, OUTPUT);
   digitalWrite(18, HIGH); // disable LoRa_CS
 
+  boot_count++;
+
+/*  time_t now;
+  struct tm timeinfo;
+  time(&now);
+  setenv("TZ", "GMT+1", 1);
+  tzset();
+  localtime_r(&now, &timeinfo);*/
+
+  esp_sleep_wakeup_cause_t wakeup_reason = esp_sleep_get_wakeup_cause();
+  switch(wakeup_reason) {
+    case ESP_SLEEP_WAKEUP_EXT0:
+      Serial.println("wakeup by RTC_IO");
+      break;
+    case ESP_SLEEP_WAKEUP_EXT1:
+      Serial.println("wakeup by RTC_CNTL");
+      break;
+    case ESP_SLEEP_WAKEUP_TIMER:
+      Serial.println("wakeup by timer");
+      break;
+    case ESP_SLEEP_WAKEUP_TOUCHPAD:
+      Serial.println("wakeup by touchpad");
+      break;
+    case ESP_SLEEP_WAKEUP_ULP:
+      Serial.println("wakeup by ULP");
+      break;
+    default: // ESP_SLEEP_WAKEUP_UNDEFINED
+      Serial.println("wakeup not by deep sleep");
+      break;
+  }
+
   //Initialize Basecamp
   iot.begin();
 
@@ -139,7 +172,14 @@ void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProperties
 
 void suspend() {
   DEBUG_PRINTLN("Entering deep sleep");
+  esp_sleep_enable_timer_wakeup(1000000LL * secondsToSleep);
   esp_sleep_enable_ext0_wakeup((gpio_num_t)sensorPin, 0);
+
+  const uint64_t ext_wakeup_pin_1_mask = 1ULL << ext_wakeup_pin_1;
+  const uint64_t ext_wakeup_pin_2_mask = 1ULL << ext_wakeup_pin_2;
+//  esp_sleep_enable_ext1_wakeup(ext_wakeup_pin_1_mask | ext_wakeup_pin_2_mask, ESP_EXT1_WAKEUP_ANY_HIGH);
+
+  //esp_deep_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF); // power down all peripherals
   //properly disconnect from the MQTT broker
   iot.mqtt.disconnect();
   //send the ESP into deep sleep