Hello,
I am using SDK version15.20,pca10056,s140.
In my application I am using Bluetooth to send the data values at the rate of 750 samples per second. By sending 3 set of 20 bytes each at a time. On plotting the same at the below specified speed, the data is plotted at the desired speed.
#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */ #define APP_ADV_DURATION BLE_GAP_ADV_TIMEOUT_LIMITED_MAX//BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED /**< The advertising duration (180 seconds) in units of 10 milliseconds.1000 */ #define MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms). Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms). Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< Slave latency. */ #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). Supervision Timeout uses 10 ms units. */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(20000) /**< Time from initiating an event (connect or start of notification) to the first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
In this case the DFU updation, works properly but the graph is not plotting at the speed we expect.
But on changing the parameters value to the one specified below,
#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */ #define APP_ADV_DURATION BLE_GAP_ADV_TIMEOUT_LIMITED_MAX//BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED /**< The advertising duration (180 seconds) in units of 10 milliseconds.1000 */ #define MIN_CONN_INTERVAL MSEC_TO_UNITS(10, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms). Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(50, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms). Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< Slave latency. */ #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). Supervision Timeout uses 10 ms units. */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(20000) /**< Time from initiating an event (connect or start of notification) to the first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
The DFU shows GATT ERROR but graph when plotted (without implementing DFU) have the speed we expected.
In my case I am not able to debug the bootloader code , so i am not able to detect the error properly. So Please provide me suggestions on MIN_CONN_INTERVAL and MAX_CONN_INTERVAL and provide me a solution for debugging my bootloader application. When i debug the bootloader it works for the first attempt and shows log information, but on second time it lose its debug connection as the device get disconnect and restart again. I am not able to perform DFU on every second attempt. And that log information is not readily available for me.
Regards,
Shilpa
