examples/power_save: enable modem sleep and DFS by default

diff --git a/examples/wifi/power_save/main/Kconfig.projbuild b/examples/wifi/power_save/main/Kconfig.projbuild
index 96e28d0b99c3873f126c484851bf4e4bf6e087c2..70c87c86b104b30ff151b5641f4e78458e6dfe85 100644 (file)
--- a/examples/wifi/power_save/main/Kconfig.projbuild
+++ b/examples/wifi/power_save/main/Kconfig.projbuild
@@ -14,7 +14,7 @@ config WIFI_PASSWORD
 
 choice POWER_SAVE_MODE
     prompt "power save mode"
-    default POWER_SAVE_NONE
+    default POWER_SAVE_MODEM
     help
        Power save mode for the esp32 to use.
 

diff --git a/examples/wifi/power_save/main/power_save.c b/examples/wifi/power_save/main/power_save.c
index dae26fb9a5e9756bec1e8f7a939d904927ce19c8..f1d665fb91d74888500c24445c2ac8927affb095 100644 (file)
--- a/examples/wifi/power_save/main/power_save.c
+++ b/examples/wifi/power_save/main/power_save.c
@@ -17,6 +17,7 @@
 #include "esp_wifi.h"
 #include "esp_log.h"
 #include "esp_event_loop.h"
+#include "esp_pm.h"
 #include "nvs_flash.h"
 
 /*set the ssid and password via "make menuconfig"*/
@@ -89,5 +90,17 @@ void app_main()
     }
     ESP_ERROR_CHECK( ret );
 
+#if CONFIG_PM_ENABLE
+    // Configure dynamic frequency scaling: maximum frequency is set in sdkconfig,
+    // minimum frequency is XTAL.
+    rtc_cpu_freq_t max_freq;
+    rtc_clk_cpu_freq_from_mhz(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &max_freq);
+    esp_pm_config_esp32_t pm_config = {
+            .max_cpu_freq = max_freq,
+            .min_cpu_freq = RTC_CPU_FREQ_XTAL
+    };
+    ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
+#endif // CONFIG_PM_ENABLE
+
     wifi_power_save();
 }

diff --git a/examples/wifi/power_save/sdkconfig.defaults b/examples/wifi/power_save/sdkconfig.defaults
new file mode 100644 (file)
index 0000000..0c212b1
--- /dev/null
+++ b/examples/wifi/power_save/sdkconfig.defaults
@@ -0,0 +1,6 @@
+# Use lower CPU frequency
+CONFIG_ESP32_DEFAULT_CPU_FREQ_80=y
+# Enable support for power management
+CONFIG_PM_ENABLE=y
+# Use RTC timer as reference
+CONFIG_PM_USE_RTC_TIMER_REF=y