battery service

RE: battery service

Mohamed O.Abouzeid — Tue, 25 Aug 2015 12:13:54 GMT

thank u michael :) :)

RE: battery service

Michael Dietz — Tue, 25 Aug 2015 11:52:50 GMT

Yes, I think you are correct and you are on the right track. You should be able to test it and see if it works how you think it will. I haven't actually implemented this myself.

RE: battery service

Mohamed O.Abouzeid — Tue, 25 Aug 2015 11:45:26 GMT

I won't call the ble_bas_battery_level_update untill the battery reaches to a certain voltage & the

battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);

is the indication of the battery level & we can use it to indicate the battery level and take actions upon it inside the battery_level_update or any other function is that true ? ?

thank you for your help again

RE: battery service

Mohamed O.Abouzeid — Tue, 25 Aug 2015 11:43:08 GMT

thank you for your help, what I'm thinking about is to do something like this, is that true ? ?

	/**@brief Function for performing a battery measurement, and update the Battery Level characteristic in the Battery Service.
 */
static void battery_level_update(void)
{
		uint32_t err_code;
		uint8_t  battery_level;

		battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
		//set the condition for sending notification
	if(battery_level == 100)
	{
		err_code = ble_bas_battery_level_update(&m_bas, battery_level);
		if ((err_code != NRF_SUCCESS) &&
				(err_code != NRF_ERROR_INVALID_STATE) &&
				(err_code != BLE_ERROR_NO_TX_BUFFERS) &&
				(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
		)
		{
				APP_ERROR_HANDLER(err_code);
		}
	}

RE: battery service

Michael Dietz — Tue, 25 Aug 2015 07:27:56 GMT

See ble_bas.h:

ble_bas_battery_level_update(...) is called by the application (probably main.c for you) after performing a battery measurement. If notifications are enabled for this service (they are by default, see services_init() in main.c) and the battery level has changed from the last reading, then the battery level characteristic is sent to the client over your ble connection.

What this means for you is that every time you measure your battery level you will want to call ble_battery_level_update(...). At this point every time the battery level changes the value will be sent over ble. But if you only want to update the value when it reaches a predefined level (say 75%) then keep notifications disabled by default bas_init.support_notification = false; and make this true only when you read 75%. Then set it back to false or whatever you want.

Experiment with this and let me know if it works! -Mike

RE: battery service

Mohamed O.Abouzeid — Tue, 25 Aug 2015 01:56:41 GMT

any help please !!