PowerSaving-arduino-lib

• Releases: https://github.com/IoTThinks/powersaving-arduino-lib/releases
• Powered by IoTThinks.com (8+ year in IoT / LoRa / LoRaWAN)

PowerSaving Arduino Core 2.0.17 for low power ESP32 boards

PowerSaving Arduino Core 2.0.17 is built for low power ESP32 boards.

• ESP32 boards with active BLE can reduced from 120mA down to 15-25mA.
• Based on Arduino Core 2.0.17 and IDF 4.4.7
• Power Management enabled
• BLE Sleep enabled
• Supports ESP32, ESP32S3 and ESP32C3.
• ESP32S2 is not supported yet due to low usage. If you need it, contact us at https://iotthinks.com/

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Instruction:

• In platformio.ini, use the below in your platform_packages = platformio/framework-arduinoespressif32@https://github.com/IoTThinks/powersaving-arduino-lib/releases/download/2.0.17/esp32-2.0.17.zip
• In main.cpp, include the libraries

#include "esp_pm.h"
#include "esp_bt.h"

• In setup(), enable PowerSaving mode

// Enable BLE sleep
  esp_err_t errBLESleep = esp_bt_sleep_enable();
  if (errBLESleep == ESP_OK) {
    Serial.println("Bluetooth sleep enabled successfully");
  } else {
    Serial.printf("Bluetooth sleep enable failed: %s\n", esp_err_to_name(errBLESleep));
  }

#if CONFIG_IDF_TARGET_ESP32C3
  esp_pm_config_esp32c3_t pm_config;
#elif CONFIG_IDF_TARGET_ESP32S3
  esp_pm_config_esp32s3_t pm_config;
#elif CONFIG_IDF_TARGET_ESP32
  esp_pm_config_esp32_t pm_config;
#endif

  // Configure Power Management
  pm_config = { .max_freq_mhz = 80, .min_freq_mhz = 40, .light_sleep_enable = true };
  esp_err_t errPM = esp_pm_configure(&pm_config);
  if (errPM == ESP_OK) {
    Serial.println("Power Management configured successfully");
  } else {
    Serial.printf("Power Management failed to configure: %d\r\n", errPM);
  }

• In loop, make some vTaskDelay() to let MCU have some time to sleep

vTaskDelay(pdMS_TO_TICKS(50)); // attempt to sleep

Demo

• Default PowerSaving for ESP32 companion BLE. Reduced from 120mA down to 15-25mA.