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DA14531 error code: CO_ERROR_LMP_RSP_TIMEOUT

vik

Dear Supporter:

I used the DA14531 as the central device and connected the Bluetooth scanner gun as a peripheral. 

It connects successfully, but the peripheral disconnects after about 40s. The error code detected in app_on_disconnect is CO_ERROR_LMP_RSP_TIMEOUT. 
For comparison, I used the BLE app(nRFconnect) of my phone to connect this Bluetooth scanner gun, which could stably keep the connection.
Can you tell me what happened?
Thanks!
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  • 0

    Hi vik,

    Below error code for your reference. It seems some packages not received.

    Can you provide more information? Such as

    1. the frequency of this error happened

    2. Does it always happen after 40sec's connection time?

    3. What the hardware board is, is an official EVK not, if not an official EVK, does the board calibrate?

    4. Has there some 2.4G interfering signal?

    BR,

    Tim

Reply
  • 0

    Hi vik,

    Below error code for your reference. It seems some packages not received.

    Can you provide more information? Such as

    1. the frequency of this error happened

    2. Does it always happen after 40sec's connection time?

    3. What the hardware board is, is an official EVK not, if not an official EVK, does the board calibrate?

    4. Has there some 2.4G interfering signal?

    BR,

    Tim

Children
  • 0 in reply to tim.zhong

    HI,  Tim:

    Thank you for your reply!  

    About additional information is as follows：

    1. the frequency of this error happened

    inevitable

    2. Does it always happen after 40sec's connection time?

    yes，I replayed it three times, all for about 40 seconds

    3. What the hardware board is, is an official EVK not, if not an official EVK, does the board calibrate?

    I'm not sure if it's EVK, may be it is "Kit pro".  The model number of this machine is "Dialog PRO-DB 376-04-F" and "Dialog PRO-MB 376-18-B"

    4. Has there some 2.4G interfering signal?

    My environment has 2.4G wifi and other Bluetooth devices

    When using a mobile phone, it can be seen that after the scanner gun is successfully connected, it will report an L2CAP packet of about 500 bytes from time to time. I am not sure whether this has any impact.

    Some log files:

    phoneAsCentral_connect-to-scanner-gun_btsnoop_hci.log