Hello,
I'm using nRF52840(PCA10056) of SDK 15.2 to debug long range mode. And I have already followed the steps in thread: https://devzone.nordicsemi.com/f/nordic-q-a/40476/unable-to-convert-to-long-range-after-looking-at-umpteen-examples--/157300#157300
But the nRF52840 central can't connect with peripheral in BLE_GAP_PHY_CODED. Here are my steps:
1. Download SDK 15.2
2. Download zip file in thread above: nRF5_SDK_15.2.0_mod.zip
3. Unzip the zip file to read difference in "endringer.diff" file
4. Merge the diff file
diff --git a/examples/ble_central/ble_app_uart_c/main.c b/examples/ble_central/ble_app_uart_c/main.c
index 5c6ffd5..c53297b 100644
--- a/examples/ble_central/ble_app_uart_c/main.c
+++ b/examples/ble_central/ble_app_uart_c/main.c
@@ -116,6 +116,10 @@ static void scan_start(void)
ret = bsp_indication_set(BSP_INDICATE_SCANNING);
APP_ERROR_CHECK(ret);
+
+ //Optional: Change output power
+ ret = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_SCAN_INIT, 0, 8);
+ APP_ERROR_CHECK(ret);
}
@@ -164,13 +168,25 @@ static void scan_evt_handler(scan_evt_t const * p_scan_evt)
*/
static void scan_init(void)
{
- ret_code_t err_code;
- nrf_ble_scan_init_t init_scan;
+ ret_code_t err_code;
+ nrf_ble_scan_init_t init_scan;
+ ble_gap_scan_params_t scan_params;
+
+ memset(&scan_params, 0, sizeof(ble_gap_scan_params_t));
+
+ scan_params.active = 1;
+ scan_params.interval = NRF_BLE_SCAN_SCAN_INTERVAL;
+ scan_params.window = NRF_BLE_SCAN_SCAN_WINDOW;
+ scan_params.timeout = NRF_BLE_SCAN_SCAN_DURATION;
+ scan_params.filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL;
+ scan_params.scan_phys = BLE_GAP_PHY_CODED;
+ scan_params.extended = true;
memset(&init_scan, 0, sizeof(init_scan));
init_scan.connect_if_match = true;
init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
+ init_scan.p_scan_param = &scan_params;
err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
APP_ERROR_CHECK(err_code);
diff --git a/examples/ble_central/ble_app_uart_c/pca10056/s140/config/sdk_config.h b/examples/ble_central/ble_app_uart_c/pca10056/s140/config/sdk_config.h
index bb9c621..8ff8018 100644
--- a/examples/ble_central/ble_app_uart_c/pca10056/s140/config/sdk_config.h
+++ b/examples/ble_central/ble_app_uart_c/pca10056/s140/config/sdk_config.h
@@ -127,7 +127,7 @@
#endif
// <o> NRF_BLE_SCAN_BUFFER - Data length for an advertising set.
#ifndef NRF_BLE_SCAN_BUFFER
-#define NRF_BLE_SCAN_BUFFER 31
+#define NRF_BLE_SCAN_BUFFER 255
#endif
// <o> NRF_BLE_SCAN_NAME_MAX_LEN - Maximum size for the name to search in the advertisement report.
@@ -184,7 +184,7 @@
// <255=> BLE_GAP_PHY_NOT_SET
#ifndef NRF_BLE_SCAN_SCAN_PHY
-#define NRF_BLE_SCAN_SCAN_PHY 1
+#define NRF_BLE_SCAN_SCAN_PHY 4
#endif
// <e> NRF_BLE_SCAN_FILTER_ENABLE - Enabling filters for the Scanning Module.
@@ -12394,7 +12394,7 @@
// <i> Requested BLE GAP data length to be negotiated.
#ifndef NRF_SDH_BLE_GAP_DATA_LENGTH
-#define NRF_SDH_BLE_GAP_DATA_LENGTH 251
+#define NRF_SDH_BLE_GAP_DATA_LENGTH 27
#endif
// <o> NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links.
@@ -12423,7 +12423,7 @@
// <o> NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size.
#ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE
-#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247
+#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 23
#endif
// <o> NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE - Attribute Table size in bytes. The size must be a multiple of 4.
diff --git a/examples/ble_peripheral/ble_app_uart/main.c b/examples/ble_peripheral/ble_app_uart/main.c
index 4d40d21..a42a8c7 100644
--- a/examples/ble_peripheral/ble_app_uart/main.c
+++ b/examples/ble_peripheral/ble_app_uart/main.c
@@ -616,12 +616,15 @@ static void advertising_init(void)
init.advdata.include_appearance = false;
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
- init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
- init.srdata.uuids_complete.p_uuids = m_adv_uuids;
-
- init.config.ble_adv_fast_enabled = true;
- init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
- init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
+ init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
+ init.advdata.uuids_complete.p_uuids = m_adv_uuids;
+
+ init.config.ble_adv_fast_enabled = true;
+ init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
+ init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
+ init.config.ble_adv_primary_phy = BLE_GAP_PHY_CODED;
+ init.config.ble_adv_secondary_phy = BLE_GAP_PHY_CODED;
+ init.config.ble_adv_extended_enabled = true;
init.evt_handler = on_adv_evt;
err_code = ble_advertising_init(&m_advertising, &init);
@@ -687,6 +690,10 @@ static void advertising_start(void)
{
uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
+
+ //Optional: Change output power
+ err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, 8);
+ APP_ERROR_CHECK(err_code);
}
5. Build and download to central and peripheral
6. Open RTT to check log of central and peripheral
(1) central log
(2) peripheral log
7. In log, we can see that the peripheral disconnects immediately.
Have anyone met and solved this problem?
