BLE battery level server(peripheral)

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Fri, 10 Nov 2023 10:17:02 GMT

Thank you very much for the answer.

RE: BLE battery level server(peripheral)

Sigurd — Thu, 19 Oct 2023 15:59:56 GMT

Hi!

Try to change

uint8_t battery_level =0;

static uint8_t battery_level =0;

so that the function then looks like

static void battery_level_update(void)
{
    ret_code_t err_code;
    static uint8_t  battery_level =0;

     // battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
      // sensorsim_increment(&m_battery_sim_state, &m_battery_sim_cfg);
      battery_level = battery_level + 1;
      if(battery_level == 8) battery_level = 0;
      //battery_level = 11;
    err_code = ble_bas_battery_level_update(&m_bas, battery_level, BLE_CONN_HANDLE_ALL);
NRF_LOG_INFO("ble_bas_battery_level_update() returned: %d, with battery_level: %d ",err_code,battery_level);
    if ((err_code != NRF_SUCCESS) &&
        (err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != NRF_ERROR_RESOURCES) &&
        (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
       )
    {
        APP_ERROR_HANDLER(err_code);
    }
}

that way, battery_level will change each time battery_level_update() function is called.

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Thu, 19 Oct 2023 15:35:47 GMT

Hi sigurd thanks for your reply.

But you can see just above the hard coded value I have commented the code as

battery_level = battery_level + 1;

If(battery_level == 8) battery_level = 0;

When I am doing this it is not updating the counter value.just displaying the same value at all time.

So you can check by uncommenting the code snippet.

Actually I sent you the main.c file without uncommenting the code.

So please check and reply.

Thanks & Regards

Satyabrata Senapati

RE: BLE battery level server(peripheral)

Sigurd — Thu, 19 Oct 2023 15:04:46 GMT

Hi!

I had a look at the code. What's happening is that the battery level characteristic is set to 11%, and this happens before the phone connects.

When the central/phone connects, and you enable notification for the battery level characteristic, the ble_bas_battery_level_update() function will only send a notification to the phone if the old value, that is 11%, changes to a new value. Snippet from the ble_bas_battery_level_update() function:

if (battery_level != p_bas->battery_level_last)

Since you have hardcoded it to 11%, then no notifications are send. The phone can still read the battery level characteristic "manually" with a GATT read, and receive that the value is 11%. But as long as the battery level does not change, then no notifications are send either.

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Thu, 19 Oct 2023 08:44:56 GMT

yes,

I am sending the main.c file.devzone.nordicsemi.com/.../3302.main.c

RE: BLE battery level server(peripheral)

Sigurd — Thu, 19 Oct 2023 08:19:33 GMT

Hi!

Are you still having issues with the counter value?

If yes, could you post your main.c file?

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Tue, 10 Oct 2023 12:40:09 GMT

ok sir no problem.

Actually I need some clarification for the above discussion.

could you please help.

Thanks & Regards

Satyabrata Senapati

RE: BLE battery level server(peripheral)

JONATHAN LL — Mon, 09 Oct 2023 10:48:02 GMT

Hi Satyabrata,

Sigurd is on vacation so sorry for the long waiting time here.

Have you had any progress or do you still require help ?

Regards,
Jonathan

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Tue, 03 Oct 2023 04:56:42 GMT

Could you reply please.

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Fri, 29 Sep 2023 18:18:34 GMT

Hi sigurd,

Actually this is working. But my case is if I am sending the counter value its not working. Its not showing the counted value in nrfconnect app.you can see I have commented in the code snippet.

//battery_level = battery_level + 1;
// if(battery_level == 8) battery_level = 0;

RE: BLE battery level server(peripheral)

Sigurd — Fri, 29 Sep 2023 14:07:43 GMT

It looks to be working.

You are sending battery_level = 10

battery_level = 10;
err_code = ble_bas_battery_level_update(&m_bas, battery_level, BLE_CONN_HANDLE_ALL);

and this is also shown in the app

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Fri, 29 Sep 2023 10:48:20 GMT

ok. Let me send.

This is the screen shot of nrf_connect app.

And the code snippet is given below

/**@brief Function for performing battery measurement and updating the Battery Level characteristic
* in Battery Service.
*/
static void battery_level_update(void)
{
ret_code_t err_code;
uint8_t battery_level;

// battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
// sensorsim_increment(&m_battery_sim_state, &m_battery_sim_cfg);
//battery_level = battery_level + 1;
// if(battery_level == 8) battery_level = 0;
battery_level = 10;
err_code = ble_bas_battery_level_update(&m_bas, battery_level, BLE_CONN_HANDLE_ALL);
if ((err_code != NRF_SUCCESS) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}

/**@brief Function for handling the Battery measurement timer timeout.
*
* @details This function will be called each time the battery level measurement timer expires.
*
* @param[in] p_context Pointer used for passing some arbitrary information (context) from the
* app_start_timer() call to the timeout handler.
*/
static void battery_level_meas_timeout_handler(void * p_context)
{
UNUSED_PARAMETER(p_context);
battery_level_update();
}

//step-2 init app timer
static void timers_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);

// Create timers.
err_code = app_timer_create(&m_battery_timer_id,
APP_TIMER_MODE_REPEATED,
battery_level_meas_timeout_handler);
APP_ERROR_CHECK(err_code);

}

/**@brief Function for starting application timers.
*/
static void application_timers_start(void)
{
ret_code_t err_code;

// Start application timers.
err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
APP_ERROR_CHECK(err_code);
}

And in main()

/**@brief Function for application main entry.
*/
int main(void)
{
log_init();//done
timers_init();//done
//leds_init();//done

pwr_management_init();//done

ble_stack_init();//done
gap_params_init();//done
gatt_init();//done
advertising_init();//done
services_init();//done
//sensor_simulator_init();//done
conn_params_init();//done

NRF_LOG_INFO("Battery Level Server application started.....");
application_timers_start();//done
advertising_start();//done

//enter main loop
for(;;)
{
idle_state_handle();
}
}

Thats it.

RE: BLE battery level server(peripheral)

Sigurd — Fri, 29 Sep 2023 10:25:04 GMT

[quote user="Satyabrata Senapati"]Actually when I am sending some static battery level value using ble_bas_battery_level_update() ,it is displaying perfectly .But its not working for a counter value lets for testing purpose.means simply it should display the counter value[/quote]

1) Could you post some pictures that shows how it display things when it's working , and when it's not working.

2) And also post some code snippet that shows how you are doing this.

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Fri, 29 Sep 2023 09:02:35 GMT

No its not producing any error.

RE: BLE battery level server(peripheral)

Sigurd — Fri, 29 Sep 2023 07:45:05 GMT

[quote user="Satyabrata Senapati"]But its not working for a counter value lets for testing purpose.means simply it should display the counter value.So how to do this ?Am I doing something wrong?[/quote]

Does ble_bas_battery_level_update() return any error-codes when you do this?

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Fri, 29 Sep 2023 05:08:10 GMT

Actually when I am sending some static battery level value using ble_bas_battery_level_update() ,it is displaying perfectly .But its not working for a counter value lets for testing purpose.means simply it should display the counter value.So how to do this ?Am I doing something wrong?

RE: BLE battery level server(peripheral)

Satyabrata Senapati — Thu, 28 Sep 2023 13:36:41 GMT

Ok.Thanks. Let me check once again.

RE: BLE battery level server(peripheral)

Sigurd — Thu, 28 Sep 2023 12:29:32 GMT

Hi!

You send the value with ble_bas_battery_level_update().

Take a look at the ble_app_proximity example to see how it done there, the ADC is used there.