From 7b17cd2f02e45d3404a3ef83b293c6fcf4dfd295 Mon Sep 17 00:00:00 2001
From: Alberto Merciai <albe.merciai@gmail.com>
Date: Fri, 10 Jul 2020 18:17:30 +0200
Subject: [PATCH] light sleep on button press improving power consumption

---
 examples/LVGL/SimpleWatch/SimpleWatch.ino | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/examples/LVGL/SimpleWatch/SimpleWatch.ino b/examples/LVGL/SimpleWatch/SimpleWatch.ino
index 28f43bb..8eb3eb5 100644
--- a/examples/LVGL/SimpleWatch/SimpleWatch.ino
+++ b/examples/LVGL/SimpleWatch/SimpleWatch.ino
@@ -85,6 +85,12 @@ void low_energy()
             WiFi.mode(WIFI_OFF);
             // rtc_clk_cpu_freq_set(RTC_CPU_FREQ_2M);
             setCpuFrequencyMhz(20);
+
+            Serial.println("ENTER IN LIGHT SLEEEP MODE");
+            gpio_wakeup_enable ((gpio_num_t)AXP202_INT, GPIO_INTR_LOW_LEVEL);
+            gpio_wakeup_enable ((gpio_num_t)BMA423_INT1, GPIO_INTR_HIGH_LEVEL);
+            esp_sleep_enable_gpio_wakeup ();
+            esp_light_sleep_start();
         }
     } else {
         ttgo->startLvglTick();