failed to write on ble lbs in central

RE: failed to write on ble lbs in central

Kenneth — Mon, 05 Oct 2020 13:56:00 GMT

Have you tuned and verified output power and antenna matching on your hardware? This is something we can help you with, but first we need to review your schematic and layout. You can create a private case to upload your schematic and layout for feedback.

Best regards,
Kenneth

RE: failed to write on ble lbs in central

sowmiya — Mon, 05 Oct 2020 10:49:30 GMT

yes, tried to reconnect and sending data after 2 to 3 retires getting success and when central to peripheral distance at 5 meters sometimes getting failed when i retried also. on peripheral side gap connection interval is

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (1 second). */
#define SLAVE_LATENCY 3 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)

RE: failed to write on ble lbs in central

Kenneth — Thu, 01 Oct 2020 15:59:47 GMT

Hi,

BLE_HCI_CONN_FAILED_TO_BE_ESTABLISHED is something you can get shortly after the central tries to establish a connection. This means that the central have sent the connection request packet, but due to noise in environment, the packet was lost, and no link was established. In such case the central should try to re-connect again, and re-send data.

Best regards,
Kenneth

RE: failed to write on ble lbs in central

sowmiya — Thu, 01 Oct 2020 13:01:08 GMT

NRF_CLOCK_LF_ACCURACY_20_PPM

i have noted that the disconnection p_gap_evt->params.disconnected. reason is 62 (disconnected reson is 0x3e), i m looking whats the reason

thanks.

sowmiya

RE: failed to write on ble lbs in central

Kenneth — Thu, 01 Oct 2020 12:44:06 GMT

What LFCLK source (32kHz) are you using, and what tolerance (in ppm) have you configured when enabling the softdevice?

What is the disconnect reason when receiving the disconnect event?

Best regards,
Kenneth

RE: failed to write on ble lbs in central

sowmiya — Thu, 01 Oct 2020 12:20:25 GMT

thank you for your quick reply

I have debugged on both central and peripheral its not getting reset , dont know why its disconnecting frequently

RE: failed to write on ble lbs in central

Kenneth — Thu, 01 Oct 2020 11:26:57 GMT

You should add debugging on the peripheral and central, are both peers experiencing a disconnect or is possible one peer doing a reset. A reset may for instance be caused by an assert, since the fault handler is by default setup to do a reset on assert to recover.

Best regards,
Kenneth