GATT CONN FAIL ESTABLISH

[ponlakshmi]

Hi, I am debugging the UART example from SDK 10 and I am using S130 Softdevice.When ever i am trying to connect the Master it gives the error as [Error 62(0x3e):GATT CONN FAIL ESTABLISH Error 133(0x85):GATT ERROR].I am using MCP 4.0.4 in Moto E2 and android version is 5.0.2.I am attaching the Screen shot of the error message.I have tried with Samsung galaxy j1 ace android version 4.4.4 and gives the same error.I am attaching the screen shot of Error message which is from PC -Master Control Panel.Disconnection_Frequently_16-Feb-2106.pngDiconnection_MCP_16-Feb-2016.txt

[run_ar]

As far as I can see the connection is not established. Which means the connection request was not received or it was ignored by the peripheral. Are you sure that you ate not using a whitelist?

What hardware are you running this on? Are you sure your 32kHz rc source is ok? Consider testing the internal RC to see if this works better.

[ponlakshmi]

I am not using whitelist.My hardware is nrf51822QFAAHO.How the performance of Rc source will affect connection and disconnection event?????

[run_ar]

I was actually wondering if you are using a development kit or some other pcb?

The 32KHz source is used for protocol timing. Using the internal rc would make sure there are no issues with the timing. If you have issues with your 32KHz source you might not be able to connect as the listening window on the slave would be misplaced, thus loosing packets from the master (the first packet after the connection request is critical for the link to be established). It could also lead to problems keeping a connection and you might suffer from packet loss.

Do you have a sniffer trace that shows the on air packets?

[ponlakshmi]

Currently I don't have a Sniffer Trace .Once i got that i will post.Thanks for your quick reply.