BLE multiple services and characteristics not working, error code 4 after service_init() function

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

Simonr — Thu, 28 Nov 2019 08:01:20 GMT

You'll need to change the NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE in order to make room for more characteristics. In turn, this will increase the Softdevice's RAM usage, which means that you may have to change RAM start and RAM size for the application after this increase. More details on the matter in this case.

Best regards,

Simon

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

Namdev — Wed, 27 Nov 2019 10:19:51 GMT

in the service init the last function which is getting initialized returns the error. if i add an extra characterisitic to any of the service.

I personally feel i need to increase the RAM size but i am still not sure why we need to improve the RAM size. i am just adding the multiple characterisitics under a service.

I have implemented in the same way as mentioned in the other question posted in the forum.

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

Simonr — Mon, 25 Nov 2019 07:23:09 GMT

Hi Namdev

What function is it that returns this error? Try stepping through the code in order to see which function it is that returns error code 4.

You can check out this and this link in order to check that you're adding multiple characteristics/services to your application correctly.

Best regards,

Simon

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

Namdev — Fri, 22 Nov 2019 08:51:21 GMT

Hi Simon,

I am using SES(Segger embedded studio).

the problem is:

there are four services. I have added 4 characteristics in service 1.

again 3 characteristics in service 2, 3 characterisitcs in service 3 and 5 characteristics in service 4.

Now if i add even a single characteristic in any of the service it will return error code 4.

static void services_init(void)
{
ret_code_t err_code;
ble_cus_init_t cus_init;
ble_calib_init_t calib_init;
ble_oper_init_t oper_init;
ble_config_init_t config_init;
ble_device_init_t device_init;

nrf_ble_qwr_init_t qwr_init = {0};

// Initialize Queued Write Module.
qwr_init.error_handler = nrf_qwr_error_handler;

err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
APP_ERROR_CHECK(err_code);

memset(&calib_init, 0, sizeof(calib_init));
err_code = service 1(&c_cus, &calib_init);
APP_ERROR_CHECK(err_code);

memset(&oper_init, 0, sizeof(oper_init))
err_code = service2(&o_cus, &oper_init);
APP_ERROR_CHECK(err_code);

memset(&config_init, 0, sizeof(config_init))
err_code = service3(&g_cus, &config_init);
APP_ERROR_CHECK(err_code);

memset(&device_init, 0, sizeof(device_init));

err_code = service4(&d_cus, &device_init);
APP_ERROR_CHECK(err_code);

/*It is crashing after it completes this initialization*/

}

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

HuanVH — Fri, 22 Nov 2019 07:21:30 GMT

Find RAM in this post

RE: BLE multiple services and characteristics not working, error code 4 after service_init() function

Simonr — Fri, 22 Nov 2019 07:18:05 GMT

Hi Namdev

Depending on your IDE, the build window (at least in SES) tells you how much your RAM/Flash needs to increase if that's the problem. What IDE are you using anyway? Also, are you able to see what function the app_error_fault_handler is called from? When in the application does this error occur.

You can also check if this error is called when you include one specific characteristic to a specific service or if it always occurs when you try adding characteristic number X total.

Best regards,

Simon