Hi, I'm using my own custom board with the EFR32BG13P732F512GM32. In this board has not been included an LFXO external oscillator although, we have included an HFXO external oscillator of 38.4 MHz. So in the code,  sleep.flags has been set up to 0 and the software timer used to receive new gecko events has been initialized with     gecko_cmd_hardware_set_lazy_soft_timer(32706,32760,0,0);

The problem is that the device is only detected, once it is switched on, A second later is imposible to detect it maybe, because it has just entered in sleep mode. 

Then, we would like to know, if it is necessary to add more code lines to get the bluetooth comunication.

Tks for your time.  

Hello,

I'm using for a while the WT32i development kit. Always without any problem or hassle, but the kit doesn't connect anymore to any device (audio). I tried Samsung (Android) and Apple (iOS), but both won't connect anymore. I checked the firmware version, maybe with the updates of the devices that the BT is not compatible.

iWrap is 6.0.0 ('BT IDENT BT:47 f000 6.0.0 Bluegiga iWRAP')

What can be the reason or causing the connection problem?

And since today the kit is not starting up (green power LED is not emitting).  When I press the function buttons, the red LED's are emitting. So it is not completly dead.

So I need some help and assistance  to get the kit running up again and to start my new BT-project.

DKWT32i V2, M2 / 94V-0

Greetings, Marc

I want to build a model that can report the battery power to the network cloud, and I found that there are two examples of batteries(Generic Battery Server and Generic Battery Server), how can I use them? Can you give a simple example?

My device is EFR32BG13, model look at picture:

Hello:

Anyone have an example on how to change the device name from a client on the fly?

I have code on my client app to write an utf-8  string to the Device Name characteristic, but I don't know how to handle it on the server side.

Should I use "user" rather than utf-8? Why can't I just "user" for all GATT write/Read?

Thanks in advance,

Marcelo

Hi,

I'm using the passkey display  mecanism on the device side to create an authenticated link (passkey entry on smartphone side). On Android phones I'm able to bond with the device when the first 6 digits of the passkey is correct even if there are other digits after. So if I add random digits after the correct passkey, the bonding will still succeed. It seems Android chops off the additional digits. On iOS the pairing fails though.

Example : if the passkey is set to 123456, I can enter 12345601010101 on Android and pairing will work.

Is it an expected behavior?

Hi Guys,

After setting-up PIN Pairing (thanks for suggestion to Dylan):

gecko_cmd_sm_configure(0x0F, sm_io_capability_displayonly);
gecko_cmd_sm_set_bondable_mode(1);
gecko_cmd_sm_store_bonding_configuration(10,2);
gecko_cmd_sm_set_passkey(1234);

and connecting by iOS 12 it works as expected (as well as connection closing), the phone is older one 5S model, but when connecting by Android 9.0 (new xiaomi Mi A2 lite phone), initiation of the pairing process is not reliable and after pairing phone shows wrong PIN (also seeing on uart terminal from pairing event).

Do somebody have idea what could be wrong?
if Android 7 is used there is compatibility issue and pairing fail (tablet with Android 7.0).

Thanks a lot,

Valentin

Dear experts,

I'm trying to develop some usage with BLED112, and the SDK version is 1.3.1-119.

The issue I met is when I try to change the advertising interval when the iBeacon advertisement is enabled, it didn't work.  I know that set adv parameter won't take effect until adv stop and re-start advertising.

The main logic is when dealing with adv_interval setting, I will check if advertisement is enabled or not.

If enabled, stop advertisement first, then set adv parameter,  then re-start advertising.

1. call gap_set_mode(gap_non_discoverable, gap_non_connectable)
2. call gap_set_adv_parameters(adv_interval, adv_interval + 20, 7)
3. call gap_set_mode(gap_user_data, gap_non_connectable)

If not enabled:

• call gap_set_adv_parameters(adv_interval, adv_interval + 20, 7)

Would you please kindly figure out what mistake I have made, and how to fix it? Thank you, very much.

Hello,

I am trying to debug a project under simplicity studio but I get an error when trying to debug.

The configuration is the following :

- A BGM13P32 module plugged on a EFR32 Blue Gecko Module Radio Board (please see picture in attachment).

Under Simplicity Studio :

- In the properties of my project and C/C++ Build => Board/Part/SDK, the board is configured as "BGM13P32 Bluetooth Module Radio Board BRD4306B).

- The part selected is EFR32BG13P732F512GM48.

When I whant to debug the project :

After compiling, when I click to Debug, I am asked to select a device that is compatible with EFR32BG13P732F512GM48. So I choose the connected device which is BGM13P32F512GA. Then I get the following message : "The connected device part (BGM13P32F512GA) is not compatible with this operation, expected EFR32BG13P732F512GM45. Are you sure you want to continue ? So I click the Yes button.

Finally I get the message Could not connect debugger. Target voltage too low, 0.024V mesured.

The board is power via USB and the switch on the board is on the position "AEM". 

Do you know what can be the problem please ?

Best regards

I seem to be getting nowhere. So far, I have got nothing to work from the kit. I have purchased a 'SLWSTK6101C' kit. I will not include any past struggles with kit, I will only mention, the recent one.

I am attempting to get soc-smartPhone project going. I assume that this project when correctly build and downloaded into the wireless kit, will allow me to use mobile gecko app and demonstrate a bidirectional communication between mobile phone and the kit. I am using BGM111 radio module board.

The project files are generated from soc-smartPhone.isc Bluetooth Gatt configurator. The SDK version used is 2.10.1.0. Without doing any changes, I build the project. From the folder ...\soc-thermometer\GNU ARM v7.2.1 - Default – BGM111A256V2, I program the flash with soc-thermometer.hex file. I see no change on the display of kit. When I launch the Blue Gecko application on my smart-phone and select the 'Health Thermometer' function, it opens up an empty page displaying Blue Gecko (I interpret that the smart phone application has not discovered any wireless kit with BGM11 on it).

I am confused about the entire process itself. From the Simplicity Studio, when the main file is build, a hex file is generated. Is there any linking process involved? Also, I believe that the radio board is used in standalone mode (and not network co-processor mode). When I do get the BGM111 radio module going, I hope to add some more features to it. (We have some proprietary one wire protocol in all of our products. I have assumed that the BGM111 is enough to implement Bluetooth stack and add some custom code for proprietary protocol as well)

Can someone guide me through the above? Many Thanks.

Hi,

when I try to generate an example project I get the following message:

Script Failed
  Project operation failed
    Error creating Sample Application. Error invoking External Generator's Python API layer. UnicodeEncodeError: 'ascii' codec can't encode character u'\xdc' in position 1: ordinal not in range(128) in C:\SiliconLabs\SimplicityStudio\v4\developer\sdks\gecko_sdk_suite\v2.3\app\bluetooth\code_generator\sdk_generator_api_ble.py at line number 2

I get this error message on my Windows 7 Pro / 64 bit PC.

When I use a PC with Windows 10 the project gets generated without problems.

I tried to reinstall Simplicity Studio with no effect.

Has anyone an Idea?

Thanks in advance.

Sebastian

Hi I am working on developing a bluetooth PCB using the BGM121. I have a few hardware design questions as well as tuning questions. I plan on using the internal antenna.

An RF engineer answered some of my earlier questions, but I had some followup questions and was unable to ask him them due to his busy schedule.

Due to the application of the device, we would like our design to be around 10-11mm x 10-11mm in size. The range can be short (<15m).

The questions are as follows:

1) You mentioned that the trace width to maintain 50 ohms a 4 layer standard PCB from advanced circuits was 17mil using this calculator https://www.eeweb.com/tools/microstrip-impedance. However, when I enter the specs from advanced circuits for a standard 4 layer board I do not get this. I get something closer to 30 mil. In addition, the calculator that you sent does not include spacing from the ground place around the trace. The calculator that I used to get 30 mil was AppCAD by http://www.hp.woodshot.com/. What am I doing differently than you to get this difference in trace width?

2) You mentioned that adjusting the width of the antenna loop on the BGM121 does not affect the frequency/impedance of the signal coming out of the rf_out port or the internal antenna. The datasheet mentions that changing the width of the antenna loop is used to tune up or down the frequency of the rf signal depending on which direction you shift the loop. If this does not affect the frequency/impedance of the rf_out port signal or the internal antenna, what causes this frequency shift. Also if the frequency/impedance does not change from the rf_out port how can you use a VNA to tune the antenna?

3) How do you use a VNA to quantitatively know how much to adjust the antenna loop to minimize power loss?

4) Can you tell me if there are flaws in the following logic: The standard output impedance from the rf_out port is 50 ohms. We have to make a trace that has 50 ohm impedance from the rf_out port to the U.FL connector. Depending on various factors when the BGM121 module is placed on a PCB, the impedance of the rf_out port can shift from 50 ohms to something slightly different. Since the trace to the U.FL connector is 50 ohms impedance if the rf_out port is giving a signal that is not 50 ohms there is reflection and power loss. When we adjust the antenna loop to “tune” the module, we try to get the impedance of the rf_out port to be 50 ohms. When it is 50 ohms, on the VNA we will see that there is very little power loss. This is the logic that I used until you mentioned that the rf_out port impedance does not change when you adjust the width of the antenna loop. If that is the case, how is it possible to use a VNA to tune the antenna?

Sincerely,

Rohan Uhrora

Hi,

I am doing some work to implement an application controlled OTA update with an EFR32GB13 device and wanted to utilize lzma compression for the update GBL file.

When configuring the Gecko Bootloader (based on the 1.8.2 internal single 512K version) to enable the "GBL Compression (LZMA)" plugin, the size of the resulting bootloader ends up being greater than the 16KB of dedicated bootloader flash storage space available on the EFR32B13.  I tried deselecting some of the plugins that are enabled by default to reduce the bootloader size, but it seems all of the default ones are required due to dependencies or in order for the build to succeed.  Playing with the build settings also proved unsuccessful in getting the size of the bootloader down to the 16KB limit.

So is there any advice on how I could get the bootloader size reduced (I think it is only 224 bytes or so too big) to fit within the 16KB limit?

Thanks

Greg

Hello,

I am working on a project where my BLE device reads values from different sensors on the one hand, and handles advertising and connections with other BLE devices on the other hand. I am trying to consume as less power as possible, and my current consumption is HUGE and I don't know if I can solve it : 6 mA under 3 VDC input (the sensors only consume 0.1 mA).

I read (https://www.silabs.com/community/wireless/bluetooth/forum.topic.html/efr32bg_ble_advertis-68rX) that choosing gecko_peek_event  rather than gecko_wait_event  does not impact power consumption as long as I sleep between function calls. The whole program was developped based on the choice : gecko_peek_event so switching to gecko_wait_event   would be my very last solution. I  followed this guide to handle sleeping : https://www.silabs.com/documents/login/user-guides/ug136-ble-c-soc-dev-guide.pdf

My main loop looks like this :

while(1)
{
    some_stuff();
    ble_tsk();
    some_other_stuff();
}

and my ble function looks like this :

void ble_tsk(void)
{
    struct gecko_cmd_packet* evt;

    CORE_DECLARE_IRQ_STATE;
    
    evt = gecko_peek_event();

    if( evt == NULL )
        return;


    switch(BGLIB_MSG_ID(evt->header))
    {
        case gecko_evt_dfu_boot_id:
	    {
	        struct gecko_msg_dfu_boot_evt_t* data = &evt->data.evt_dfu_boot;
	        gecko_evt_dfu_boot(data->version);
	    }
            ...
    }

    CORE_ENTER_ATOMIC();
    uint32_t durationMs = gecko_can_sleep_ms();
    gecko_sleep_for_ms(durationMs);
    CORE_EXIT_ATOMIC();
}

First, the durationMs during which I can sleep is always 0 : why is it so ?

Secondly, if I force sleeping, the power consumption goes down to 4 mA, which is of course better, but far from my expectations. How come my microcontroller consumes this much ? Isn't it supposed to consume only around 100 uA when sleeping ? Is it due to gecko_peek_event ?

Thanks.