設置藍牙的TX Power

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使用的函數sd_ble_gap_tx_power_set(int8_t tx_power);

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參看例子為 S110/ble_app_proximity

#define TX_POWER_LEVEL (4) /**< TX Power Level value. This will be set both in the TX Power service, in the advertising data, and also used to set the radio transmit power. */

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static void gap_params_init(void) {uint32_t err_code;ble_gap_conn_params_t gap_conn_params;ble_gap_conn_sec_mode_t sec_mode;BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME));APP_ERROR_CHECK(err_code);err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_KEYRING);APP_ERROR_CHECK(err_code);memset(&gap_conn_params, 0, sizeof(gap_conn_params));gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;gap_conn_params.slave_latency = SLAVE_LATENCY;gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;err_code = sd_ble_gap_ppcp_set(&gap_conn_params);APP_ERROR_CHECK(err_code);err_code = sd_ble_gap_tx_power_set(TX_POWER_LEVEL);APP_ERROR_CHECK(err_code); }

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可以設置的輸出的功率為 accepted values are -40, -30, -20, -16, -12, -8, -4, 0, and 4 dBm

/**@brief Set the radio's transmit power. * * @param[in] tx_power Radio transmit power in dBm (accepted values are -40, -30, -20, -16, -12, -8, -4, 0, and 4 dBm). * * @note -40 dBm will not actually give -40 dBm, but will instead be remapped to -30 dBm. * * @return @ref NRF_SUCCESS Successfully changed the transmit power. * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied. * @return @ref NRF_ERROR_BUSY The stack is busy, process pending events and retry. */ SVCALL(SD_BLE_GAP_TX_POWER_SET, uint32_t, sd_ble_gap_tx_power_set(int8_t tx_power));

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