can this be the problem for taking toolong time?

[navid]

hi i have one custom service that have 6 characteristics when in android i want to write in one of characteristics it take about one sec . is this for having 6 characteristic in one service? another problem is that it frequently disconnect from gatt not only my app but nrf master i think gatt is going down . why is that?

[Petter Myhre]

It is not because you have 6 characteristics in one service. What connection interval are you using? Regarding the disconnect, you provide very little information. Please have a look at "Ask questions!" section in our tour. Maybe some function in your code returns an error that leads to an error? Please have a look at this.

[navid]

my conection interval is

    #define APP_ADV_INTERVAL                     35
#define MIN_CONN_INTERVAL                    MSEC_TO_UNITS(500, UNIT_1_25_MS)           /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL                    MSEC_TO_UNITS(1000, UNIT_1_25_MS)          /**< Maximum acceptable connection interval (1 second). */
#define SLAVE_LATENCY                        0                                          /**< Slave latency. */
#define CONN_SUP_TIMEOUT                     MSEC_TO_UNITS(4000, UNIT_10_MS)            /**< Connection supervisory timeout (4 seconds). */

[Petter Myhre]

It is the central device that dictates the connection interval, the peripheral can only request to update the connection parameters. How to check the actual connection interval is described here.