This script tests the BLE power settings on an ESP32. It initializes BLE, retrieves the power settings for advertising, scanning, and default modes, and prints them via the serial monitor.

Usage:

1. Upload the script to your ESP32.
2. Open the serial monitor at 115200 baud.

Output: The serial monitor will display the power settings for advertising (ADV), scanning (SCAN), and default (DEFAULT) modes.

Power Levels

// Bluetooth power level settings for ESP32
ESP_PWR_LVL_N12 = 0,                /*!< -12 dBm */
ESP_PWR_LVL_N9  = 1,                /*!< -9 dBm */
ESP_PWR_LVL_N6  = 2,                /*!< -6 dBm */
ESP_PWR_LVL_N3  = 3,                /*!< -3 dBm */
ESP_PWR_LVL_N0  = 4,                /*!< 0 dBm */
ESP_PWR_LVL_P3  = 5,                /*!< +3 dBm */
ESP_PWR_LVL_P6  = 6,                /*!< +6 dBm */
ESP_PWR_LVL_P9  = 7,                /*!< +9 dBm */

// Backward compatibility mappings
ESP_PWR_LVL_N14 = ESP_PWR_LVL_N12,  /*!< -14 dBm maps to -12 dBm */
ESP_PWR_LVL_N11 = ESP_PWR_LVL_N9,   /*!< -11 dBm maps to -9 dBm */
ESP_PWR_LVL_N8  = ESP_PWR_LVL_N6,   /*!< -8 dBm maps to -6 dBm */
ESP_PWR_LVL_N5  = ESP_PWR_LVL_N3,   /*!< -5 dBm maps to -3 dBm */
ESP_PWR_LVL_N2  = ESP_PWR_LVL_N0,   /*!< -2 dBm maps to 0 dBm */
ESP_PWR_LVL_P1  = ESP_PWR_LVL_P3,   /*!< +1 dBm maps to +3 dBm */
ESP_PWR_LVL_P4  = ESP_PWR_LVL_P6,   /*!< +4 dBm maps to +6 dBm */
ESP_PWR_LVL_P7  = ESP_PWR_LVL_P9,   /*!< +7 dBm maps to +9 dBm */

Data Source

For more information, visit the official ESP-IDF GitHub repository.