adding custom uuid

RE: adding custom uuid

SM_ — Wed, 03 Mar 2021 06:43:53 GMT

Hi,

Can you please share/send the project (.zip) file? the above link doesn't contain any file.

RE: adding custom uuid

control — Thu, 18 Jun 2020 09:52:05 GMT

I found the problem. I forgot to return NRF_SUCCESS in the char_add methods. Thanks for help anyway.

RE: adding custom uuid

control — Wed, 17 Jun 2020 13:21:47 GMT

Here is the project: https://we.tl/t-Sx6SJuu421 please go to \Ble_Indu4s_Nordic\pca10040e\s112\ses. The project has one service ble_mass. In service_init() I added five characteristics but the first one is declared as static uint32_t current_gas_char_add(ble_mass_t *p_mass) which is the reason why remaining four characteristics are not visible. If the static prefix is removed then all characteristics are visible. I am really curious about what is the problem.

RE: adding custom uuid

Vidar Berg — Wed, 17 Jun 2020 12:31:45 GMT

You can include as an attachment when you post a comment here. It's sufficient to make a zip of the project folder as long as it includes all dependencies and that you haven't modified any SDK source files (upload the entire SDK if you have).

RE: adding custom uuid

control — Wed, 17 Jun 2020 11:38:19 GMT

Please let me know what I have to do that you will get source code. Thanks for help in advance

RE: adding custom uuid

Vidar Berg — Wed, 17 Jun 2020 10:06:23 GMT

Thanks for the update. Unfortunately, I can't really think of any reason as to why it would help to remove the 'static' keyword. It should only limit the scope of the function, meaning that it can only be called inside the source file it has been defined in.

RE: adding custom uuid

control — Wed, 17 Jun 2020 06:53:54 GMT

you are so kind. I spend a few hours and I think that I found the problem, but I do not know why this happens. if I declare the functions without static then I get two characteristics otherwise not.

uint32_t current_gas_char_add(ble_mass_t *p_mass){...}

uint32_t capacity_date_char_add(ble_mass_t *p_mass){..}

Do you know what is the problem? I suspect that the problem is with static memory.

RE: adding custom uuid

Vidar Berg — Tue, 16 Jun 2020 12:57:26 GMT

Would it be possible for you to upload the project here so I can try it? I will make this ticket private if it helps.

RE: adding custom uuid

control — Tue, 16 Jun 2020 12:51:20 GMT

I try but it does not work. It is very interesting if I exchange the order of characteristics I also get only the first characteristic.

RE: adding custom uuid

Vidar Berg — Tue, 16 Jun 2020 11:48:44 GMT

It could be that client has cached the characteristics from a previous connection and that is why it doesn't see the new characteristic you added. If you use nRF connect on Android, try to select "Refresh device cache" after establishing the connection. Or if you are on iOS, kill the app and toggle flight mode enable button in settings, then re-open the app and re-connect.

RE: adding custom uuid

control — Tue, 16 Jun 2020 10:55:30 GMT

I solve the problem. The error was shown in J-Link RTT Viewer and not directly in the output panel in the segger studio. I added two characteristics but I see only the first one which was added first. Do you know what can be the problem because I do not get any error? The constant BLE_GATT_DB_MAX_CHARS is set to 6.

RE: adding custom uuid

Vidar Berg — Tue, 16 Jun 2020 08:49:36 GMT

The linker errors show that you run out of flash when you turn off optimization. However, this is not related to the NRF_ERROR_NO_MEM you get from sd_ble_enable(). Were you able to view the RTT log messages?

Note that you can view the RTT messages while debugging in Segger if you disable the NRF_FPRINTF_FLAG_AUTOMATIC_CR_ON_LF_ENABLED option in sdk_config.h.

RE: adding custom uuid

control — Mon, 15 Jun 2020 14:03:13 GMT

I am using nrf log module. My project is written based on ble template project. I added build configuration "Debug" which inherits from common The optimization level I can not set to None because I get the following error:

C:/Program Files/SEGGER/SEGGER Embedded Studio for ARM 4.52c/gcc/arm-none-eabi/bin/ld: error: .rodata is too large to fit in FLASH memory segment
1> C:/Program Files/SEGGER/SEGGER Embedded Studio for ARM 4.52c/gcc/arm-none-eabi/bin/ld: error: .data is too large to fit in FLASH memory segment
Build failed

I am using the same optimization level (level 2 for size) for debug and release. I also set NRF_LOG_BACKEND_RTT_ENABLED 1.

RE: adding custom uuid

Vidar Berg — Mon, 15 Jun 2020 13:21:01 GMT

Hi,

Yes, you usually have to increase the APP_RAM_BASE (see mem layout) address after increasing the NRF_SDH_BLE_VS_UUID_COUNT setting because the Softdevice needs more RAM to fit the larger UUID buffer.

Which IDE are you using, and do you have logging over RTT or UART enabled? The debug log should print out the minimum APP_RAM_BASE address you can use if sd_ble_enable returned NRF_ERROR_NO_MEM .