power optimization

Signed-off-by: dragonchaser <christian@boltares.de>

btcontrol.ino

@@ -6,8 +6,14 @@
 
 #include <mutex>
 
-// POWER SAVE ATTEMPTS
-//#include <WiFi.h>
+extern "C" {
+  #include "esp_wifi.h"
+  #include "esp_event.h"
+  #include "esp_log.h"
+  #include "nvs_flash.h"
+  #include "soc/rtc_cntl_reg.h"
+  #include "soc/soc.h"
+}
 
 // Methods
 uint64_t StrToHex(const char* str);
@@ -213,8 +219,19 @@ void setup() {
   pBLEScan->setWindow(BLE_WINDOW);  // less or equal setInterval value
 
   // POWER SAVING!
-  //WiFi.disconnect(true);  // Disconnect from the network
-  //WiFi.mode(WIFI_OFF);
+  // Measurements:
+  // ------------- (All tests run with 1 device detected, providing color FF0000)
+  // Default, 240Mhz nothing disabled -> 0.13A
+  // No Wifi, throttled to 80Mhz (this is the minimum) -> 0.11A
+
+  // Assuming the best case 0.07A when no lights ae on and the worst case 0.15A when all 7 lights are on
+  // and using a 20Ah powerbank, the device sholuld run between 5.5 days and 11.9 days
+  // esp_light_sleep does not work, neither das disabling the brown-out-detector
+  esp_wifi_stop();
+  esp_wifi_deinit();
+  esp_wifi_set_mode(WIFI_MODE_NULL);
+
+  setCpuFrequencyMhz(80);
 }
 
 void loop() {