Hi,

I am using BGM13P32 in a NCP architecture. I am able to provision the devices and works fine for Few hours(can say 5-6hrs). After few hours some of the devices are not discoverable by Mobile Application. Even after power cycle also it's not visible. I am trying to debug in debug mode also. But I couldn't get it work. 

If I do factory reset device will be visible in Application.

Pls give some ideas on why this is happening and how to make proxy available all the times?

Regards,

Manigandan

Hi, I would like to increase the distance of the antenna range. I am using BGM111A256, wonder if I can apply something similar to AN1088 to BGM111A256 to increase distance coverage. I follow the PCB layout on the datasheet with antenna clearance, two GND vias near GND pins, 17mm on each side. the only difference is the GND vias along each side are not evenly space out, and didn't form a perfect rectangular shape as shown in the datasheet. There is also 0.635mm between top edge of BGM111 to PCB due to manufacturing torelance. Please see below for my PCB design. (*red lines indicate other trace on the PCB, black dots are via to GND) figure 1 is datasheet recommended layout, figure 2 is current layout, figure 3 is concept improve layout

If yes, which two-pin do Id connect to? the datasheet shows 2G4RF_IOP and 2G4RF_ION but I don't seem to locate their pinout.

If no, how can i increase the distance on the current design? would change to BGM111E256 using an external antenna helps? by how much?

Any help/answer would be greatly appreciated. Thank you

Hi,

We have a BGM121 device in the field - running Gecko 12.13.9 (the latest) firmware, that syncs to a smartphone and is supposed to maintain a long term connection. 

We're running into an issue where our devices pair/bond to the iPhone and maintain a connection (for several days), but *sometimes* get into a weird state where they are advertising, but stall out after connecting during the pairing/bonding process.  This seems to happen if they have been distanced on the "edge" of connection with an iPhone and and we suspect this is happening because of repeated attempts at connection after disconnection though we are not sure.

Please note we are using "just works" pairing => encrypted, but not authenticated communication, and bonding.   

1) Can you help us figure out if we're catching the appropriate errors and responding appropriately?  <relevant code below>

2)  Alternatlively, can you point us to working, reliable code that handles the connection, bonding, pairing, and catches the appropriate errors and calls to increase security, etc... ?  This would be the general usecase for any device in the field that needs to sync w/ iPhones and Android phones, but has no display/input/output, and needs to deal with the issues of bonding keys being lost/updated on the phone, being on the edge of connectivity, dealing with calls to increase security to perform encrypted communication, etc...  (The pairing examples do not cover this use case - e.g. 0x0305 or 0x0206 error codes...)

Thank You,

Greddy

void appHandleEvents(struct gecko_cmd_packet *evt)
{
	switch (BGLIB_MSG_ID(evt->header)) {

	/* Boot event and connection closed event */
	case gecko_evt_system_boot_id:

		/* Initialize app */
		gecko_cmd_sm_store_bonding_configuration(8, 2);	// 8=> set maximum number of bonds to 8 (default is 13);
														// 2=> when bond list becomes full,overwrite bond with oldest last connection
		connection_id = 0xFF;
		bond_handle = 0xFF;
		security_mode = 0xFF;
		advertisement_init();
		start_advertising(); /* Advertisement initialization */
		break;
	case gecko_evt_le_connection_closed_id:
		/* Initialize app */
		connection_id = 0xFF;
		bond_handle = 0xFF;
		security_mode = 0xFF;
		advertisement_init();
		start_advertising(); /* Advertisement initialization */
		break;
		/* Connection opened event */
	case gecko_evt_le_connection_opened_id:
		connection_id = evt->data.evt_le_connection_opened.connection;
		bond_handle = evt->data.evt_le_connection_opened.bonding;
		break;
	case gecko_evt_le_connection_parameters_id:
		security_mode = evt->data.evt_le_connection_parameters.security_mode;
		if (((bond_handle == 0xFF) || (security_mode == 0)) && (connection_id != 0xFF)){            							// not bonded or encrypted
			uint16_t increase_security_result = gecko_cmd_sm_increase_security(connection_id)->result;
		}
		break;
	case gecko_evt_sm_confirm_bonding_id:
		bond_handle = evt->data.evt_sm_confirm_bonding.bonding_handle; //gecko_msg_sm_bonded_evt_t;
		gecko_cmd_sm_bonding_confirm(connection_id, 1);
		break;
	case gecko_evt_sm_bonded_id:
		bond_handle = evt->data.evt_sm_bonded.bonding; //gecko_msg_sm_bonded_evt_t;
		break;
	case gecko_evt_sm_bonding_failed_id:
	{
		connection_id = evt->data.evt_sm_bonding_failed.connection;
		uint16_t bonding_fail_reason = evt->data.evt_sm_bonding_failed.reason; //gecko_msg_sm_bonding_failed_evt_t;
		if (bonding_fail_reason == 0x018B){
			gecko_cmd_sm_delete_bondings();	// delete all bondings from PS Store
		}
		else if ((bonding_fail_reason == 0x0305) || (bonding_fail_reason == 0x0206)){
			gecko_cmd_sm_delete_bonding(bond_handle);
			if (connection_id > 0){
				gecko_cmd_le_connection_close(connection_id);
			}
		}
		else{
			gecko_cmd_sm_delete_bonding(bond_handle);
			if (connection_id > 0){
				gecko_cmd_le_connection_close(connection_id);
			}
		}
	}
		break;
/*
	case gecko_rsp_sm_increase_security_id:
		uint16_t increase_security_result = evt->data.rsp_sm_increase_security.result;
		break;
*/

		/* User write request event. Checks if the user-type OTA Control Characteristic was written.
		 * If written, boots the device into Device Firmware Upgrade (DFU) mode. */
	case gecko_evt_gatt_server_user_write_request_id:
	/// DO STUFF ///
		break;

		/* Value of attribute changed from the local database by remote GATT client */
	case gecko_evt_gatt_server_attribute_value_id:
	/// DO STUFF ///
		break;

	// Indicates the changed value of CCC or received characteristic confirmation
	case gecko_evt_gatt_server_characteristic_status_id:  // happens when phone subscribes for notifications/indications, or confirms that data was properly indicated to phone
	/// DO STUFF ///
		break;

	case gecko_rsp_le_connection_close_id:
		/* Initialize app */
		connection_id = 0xFF;
		bond_handle = 0xFF;
		security_mode = 0xFF;
		advertisement_init();
		start_advertising(); /* Advertisement initialization */
		break;
		
	case gecko_evt_hardware_soft_timer_id:
		/// DO STUFF ///
		break;

	default:
		break;
	}
}

##################################
void start_advertising(void)
{

	// set server advertising data and start advertising

	// Set Advertisement data
	/// DO STUFF
	gecko_cmd_le_gap_bt5_set_adv_data(0, 0, sizeof(adv_data), adv_data);

	// set custom scan response data (Device Name, Company Identifier, and MAC Address )
	/// DO STUFF
	gecko_cmd_le_gap_bt5_set_adv_data(0, 1, sizeof(sr_data), sr_data);

	gecko_cmd_le_gap_set_advertise_channel_map(0, 7);
	gecko_cmd_le_gap_set_advertise_timing(0, 2056, 2056, 0, 0);

	gecko_cmd_sm_set_bondable_mode(1);
	gecko_cmd_sm_configure(10, sm_io_capability_noinputnooutput);
	// gecko_cmd_sm_configure(flags, io_capabilities)
	// sm_configure flags:
	// bit 0: 1=> bonding requires MITM
	// bit 1: 1 => encryption requires bonding
	// bit 2: 1 => secure connections only (requires MITM)
	// bit 3: 1 => bonding requests need to be confirmed with sm_confirm_bonding event

	gecko_cmd_le_gap_start_advertising(0, le_gap_user_data, le_gap_undirected_connectable);
}

#############################   in main():
#define MAX_ADVERTISERS 1
#define MAX_CONNECTIONS 1

uint8_t bluetooth_stack_heap[DEFAULT_BLUETOOTH_HEAP(MAX_CONNECTIONS)];

static const gecko_configuration_t gecko_config = {
  .config_flags = 0,                                   /* Check flag options from UG136 */
  .sleep.flags = SLEEP_FLAGS_DEEP_SLEEP_ENABLE,        /* Sleep is enabled */
  .bluetooth.max_connections = MAX_CONNECTIONS,        /* Maximum number of simultaneous connections */
  .bluetooth.max_advertisers = MAX_ADVERTISERS,        /* Maximum number of advertisement sets */
  .bluetooth.heap = bluetooth_stack_heap,              /* Bluetooth stack memory for connection management */
  .bluetooth.heap_size = sizeof(bluetooth_stack_heap), /* Bluetooth stack memory for connection management */
  .bluetooth.sleep_clock_accuracy = 100,               /* Accuracy of the Low Frequency Crystal Oscillator in ppm. *
                                                       * Do not modify if you are using a module                  */
  .gattdb = &bg_gattdb_data,                           /* Pointer to GATT database */
  .ota.flags = 0,                                      /* Check flag options from UG136 */
  .max_timers=16,
#if (HAL_PA_ENABLE)
  .pa.config_enable = 1,                               /* Set this to be a valid PA config */
#if defined(FEATURE_PA_INPUT_FROM_VBAT)
  .pa.input = GECKO_RADIO_PA_INPUT_VBAT,               /* Configure PA input to VBAT */
#else
  .pa.input = GECKO_RADIO_PA_INPUT_DCDC,               /* Configure PA input to DCDC */
#endif // defined(FEATURE_PA_INPUT_FROM_VBAT)
#endif // (HAL_PA_ENABLE)
  .rf.flags = GECKO_RF_CONFIG_ANTENNA,                 /* Enable antenna configuration. */
  .rf.antenna = GECKO_RF_ANTENNA,                      /* Select antenna path! */
};

Relevant Reference Docs:
1. https://www.silabs.com/community/wireless/bluetooth/knowledge-base.entry.html/2015/08/06/_reference_bonding-lnVL

2. https://docs.silabs.com/bluetooth/2.13/general/security/using-bluetooth-security-features-in-silicon-labs-bluetooth-sdk

3. https://docs.silabs.com/bluetooth/2.13/code-examples/stack-features/security/pairing-processes-example

I have read the application note AN1259, I have read through the Bluetooth Knowledge Base article (KBA_BT_1602) and I and worked through https://docs.silabs.com/bluetooth/latest/bgapi and yet I am still confused as to how to create a basic Bluetooth Peripheral application from my NCP host.

The example "NCP_Empty" is no good in this case.

Considering that BGAPI and NCP mode of operation has been around since 2015 (or thereabouts) are there not any other examples available, like on GitHub for example, which can be used to help guide me, in particular using version 3.1.

My learning aim is to create a simple application that provided the standard Battery Monitoring Service (0x180F 16bit UUID) with a Battery Level Characteristic (0x2A19) and a custom Gatt Service using a custom 128bit UUID.

For example, based on the documentation I've read it is not clear to me if I need to actually flash my NCP target device with a custom NCP-empty firmware with the right services installed or if this can be done from the NCP host itself using the BGAPI. That's how little I know.

So where do I start?

Some instruction, guidance and/or pointers on development process and any high-level pseudo-code examples would be greatly appreciated.

Thanks.

C://

Hello everyone,

I am currently carrying out tests to choose a BLE module for future application.

I am performing tests with a BGM220 board which has a BGM220PC22HNA module on board. There is a ceramic antenna on the module but for my application I need to use an external antenna.

Is it possible to redirect the antenna signal to a pinout on the module, which would connect to a U.FL connector ?

If not, which module can do this ? The module must use Bluetooth Low Energy.

Thank for your help.

environment： (EFR32XG21)[BRD4180A Rev A01][203304570] a total of two (Central) (Peripheral)

software： (V5)(gecko_sdk_3.1.1)(soc_thermometer_micriumos_mock = (Peripheral))(soc_thermometer_client = (Central))

Software added Coded PHY/+20dBm

      (Central) (Peripheral)    
      set_power = 200;
      sl_bt_init_afh();
      sl_bt_system_halt(1);
      sl_bt_system_set_max_tx_power(200,&set_power);
      sl_bt_system_set_tx_power(200,200,&set_power,&set_power);
      sl_bt_advertiser_set_tx_power(advertising_set_handle_1,200,&set_power);
      sl_bt_advertiser_set_tx_power(advertising_set_handle_2,200,&set_power);
      sl_bt_system_halt(0);

      (Peripheral)    
      sl_bt_advertiser_set_phy(advertising_set_handle_1, le_gap_phy_coded, le_gap_phy_coded);
      sl_bt_advertiser_start(advertising_set_handle_1,advertiser_general_discoverable,advertiser_connectable_non_scannable);
    
      sl_bt_advertiser_set_phy(advertising_set_handle_2, le_gap_phy_1m, le_gap_phy_1m);
      sl_bt_advertiser_start(advertising_set_handle_2,advertiser_general_discoverable,advertiser_connectable_scannable);

      (Central)
      sl_bt_scanner_set_mode(le_gap_phy_1m, SCAN_PASSIVE);
      sl_bt_scanner_set_timing(le_gap_phy_1m, SCAN_INTERVAL, SCAN_WINDOW)
      sl_bt_scanner_start(le_gap_phy_1m, scanner_discover_generic);
      sl_bt_connection_open(evt->data.evt_scanner_scan_report.address,evt->data.evt_scanner_scan_report.address_type,le_gap_phy_coded,NULL);

      -----------------------------------------------------------------------------------------------------------------------------------------
      Instrument measurement (Central) (Peripheral) TX Power Max hold is +20dBm，Instrument measurement (Central) (Peripheral) ATT is 125kbps

      Question 1：
           Transmission distance test：

           First group：(Central SLAB +20dBm setting) + (Peripheral SLAB +20dBm setting)
           Second group：(Central Phone) + (Peripheral SLAB +20dBm setting)
          
           Test Results：
           The distances after these two sets of tests are the same, there is not much difference.(Central SLAB +20dBm setting)This setting should be farther than the phone call, the             first group > the second group

           May I ask what causes this?

      
      Question 2：
             a. +20dBm setting Can all TX packets be sent at +20dBm all the time?

             b. Or only part of the packet can be maintained + 20dBm out?

             c. If you want to keep + 20dBm out how to set (not considered regulations)?

      Question 3：
             a. After Coded PHY is turned on, will all TX packets be sent by Coded PHY all the time?

             b. If you don’t keep using Coded PHY for transmission, can the transmission distance be farther than 1Mbps?

             c. If the Coded PHY is not used for transmission all the time, how to modify all the packets to be transmitted by the Coded PHY?(Central) (Peripheral)

      Questions are more troublesome. Can anyone help me answer them?

      thanks

Hi we use the BGX13 on our card for bluetooth com. We have a problem when we use your BGX13P demo board with a PC (under windows, connect with usb cable).

When we connect to the BGX13P over serial, the card start in COMMAND mode by default, that's work fine. To switch to STREAM mode we can use the commande 'str' or connect to another module. The problem is to switch back to COMMAND mode. According to your documentation we can send a break sequence '$$$' or '-breakout $$$' in a terminal to switch. The problem is that don't work if we use another terminal that simplicity studio (for example hterm).

Do you an idea what is wrong ?

regards

Hi,
We encount communication problem with BT121 bluetooth module when 2 devices are connected.

we have a product equipped with a BT121. The configurations are made using the BGAPI library and an Rfcomm server is started
A PC and a screen for displaying the real time values can be connected simultaneously to this product.
Our screen is also equipped with a BT121 Bluetooth module and paired with the product.

Once the pc and the screen are connected to the product, if we move the pc away to the reception limit, the exchanges between our product and the screen are interrupted and I receive on the screen the event 'dumo_evt_bt_rfcomm_credit_starvation_id 'which is yet a few centimeters from our product.
This event forces me to end communication.

This gives the impression that the product's Bluetooth module is trying to communicate with the PC which is at the limit of reception and suspends exchanges with the other device (the screen) which is well connected to it.

Please let me know how to fix this problem.

Regards
jc

Hello,

I have 2 BRD4308A (MGM210P032JIA2). When I run SOC-Empty example from Bluetooth demos. One of them runs fine but other does not.

I have created internal storage bootloader (single image on 1MB device) + SPP example (from this). Again one of them runs fine but other does not.

In the network analyzer only when I press reset the 1 advertisement packet is sent. Then module shows no activity.

In the energy profiler too I see similar behaviour. Only when I press reset there is an advertisement packet sent.

While debugging the code is stuck on this line...

Can anyone please suggest how do I find the source of the problem here?

Thanks

Hi is it possible to use for example USART0 for IOSTREAM ( USART0 because PD2 and PD3 are accessible to connect with external usb to UART bridge chip for displaying messages for debugging purpose with app_log_info() function) and for NCP protocol  communication EUSART or USART1  between PC host and EFR32BG22 (NCP Target)?

Hello i'm beginner here.

I work with the efm32gg board.

My project is to add the TCP to FreeRtos already integrated in an architecture.

Anyone have idéas on how to integrate TCP into FreeRTOS please?

Thanks in advance!

Dear sirs,

I have encountered "Gatt disconnection" error (error code: 0x103, GATT connection is closed due procedure timeout) when reading the temperature of traditional BLE sensors ( has established the BLE connection with BLE sensors at mesh control node) and also reading the temperature of mesh sensors at the same time (has established the mesh network with mesh sensors at the mesh control node). The temperature reading is run at the mesh control node and this error occurs when the test time is over 2 hours. Can someone tell how to fix this issue and what is the cause for this error "Gatt disconnection" ? Thanks.

The test environment description:

1. EFR32BG13P & associated EVKs for mesh control node & sensor nodes

2. EFR32MG22 & associated EVKs for BLE sensors

3. Bluetooth Mesh SDK v.1.7.4

BRs,

Bolo