BLE Send failed with error staus changed to 8

[Sagar291195]

Hello,

I am facing problems when I send  3 consecutive chunks of 244 bytes on BLE. My actual task is like receive from SPI and send it to BLE. I am receiving data in chunk of 244 and transmitting into BLE. My aim is to receiv 100 KB data from SPI and send it to BLE. I am testing slowly increasing the size but after 732 bytes code stucking and go to  NRF_BREAKPOINT_COND.

My connection parameter are as below : 

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(40, 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. */

Please udpate me as soon as possible.

[Hung Bui]

Hi Sagar, 
Please check where you receive error 8 (NRF_ERROR_INVALID_STATE) ? You may want to compile the code with no optimization and with "DEBUG" in the preprocessor symbols. 

Note that you can't send notification if the connection is disconnected. 

[Sagar291195]

Hello Hung Bui,

I am getting error in nordic application.My main problem is  sd_ble_gatts_hvx returns NRF_SUCCESS after sending some number of chunks. 

I am trying to change NRF_SDH_BLE_GAP_EVENT_LENGTH. If i change it from default values then code directly stucks into error handler

I also try to change hvn queue size but still If I change code directly goes into error handler

[Hung Bui]

Please check, step into the code and clarify which function return error 8.
Note that BLE_GAP_DATA_LENGTH_MAX is 251 bytes, and since you have some overhead, you may need to reduce the size of payload. Have you tried to test with 240 bytes ? 

Also please capture a sniffer trace so we know what happens over the air.