2 Replies Latest reply on May 5, 2016 5:13 PM by Madhu Lakshmipathy

    Timeout Exchange GATT MTU

    hugo.oliveira

      Hi, I changed the MTU attribute size to 512 and L2CAP MTU and MPS to 512 also was operating normally, but then stops working. The cysmart tries to make the switch to 512 as standard and receives no response from the server until the timeout and then nothing works, the cysmart can not get the features with the device connected follows.

         

       

         

      What can it be?

         

       

         

      'Establish Connection' request sent
      [17:07:47:535] :     BD Address Type: PUBLIC_ADDRESS
      [17:07:47:535] :     BD Address: 00:00:00:50:A0:00:00:00
      [17:07:47:535] : 'Command Status' event received
      [17:07:47:535] :     Status: BLE_STATUS_OK
      [17:07:47:545] : 'Establish Connection Response' event received
      [17:07:47:755] : 'Current Connection Parameters' event received
      [17:07:47:755] :     HCI Status: 0x00
      [17:07:47:755] :     Connection Interval: 8.75 ms
      [17:07:47:755] :     Slave Latency: 0
      [17:07:47:755] :     Supervision Timeout: 100 ms
      [17:07:47:755] : 'Command Complete' event received
      [17:07:47:755] :     Status: BLE_STATUS_OK
      [17:07:47:755] : 'Exchange GATT MTU Size' request sent
      [17:07:47:755] :     MTU: 0x0200
      [17:07:47:885] : 'Command Status' event received
      [17:07:47:885] :     Status: BLE_STATUS_OK
      [17:08:17:763] : GATT timeout notification received
      Error: gpm.M0117: Exchange GATT MTU Size timed out
      [17:08:19:630] : 'Read using Characteristic UUID' request sent
      [17:08:19:630] :     Start Handle: 0x0001
      [17:08:19:630] :     End Handle: 0xFFFF
      [17:08:19:630] :     UUID: 0x2A00
      [17:08:19:640] : 'Command Status' event received
      [17:08:19:640] :     Status: BLE_STATUS_OK
      [17:08:50:069] : GATT timeout notification received
      [17:08:50:071] : 'Discover All Primary Services' request sent
      [17:08:50:074] : 'Command Status' event received
      [17:08:50:074] :     Status: BLE_STATUS_OK
      [17:09:20:069] : GATT timeout notification received
      Error: gpm.M0117: Discover all primary services timed out