nrf51 Multilink Central and Periph Connection Issue

RE: nrf51 Multilink Central and Periph Connection Issue

Petter Myhre — Fri, 13 Feb 2015 11:13:07 GMT

I don't think there is a bug in the SoftDevice. To me it seems the multilink examples are working fine now? Then I think you must figure out what you have changed that causes the issue.

RE: nrf51 Multilink Central and Periph Connection Issue

k3nt — Fri, 13 Feb 2015 05:54:49 GMT

This seemed to do the trick. Thank you! Is this in fact a bug in the soft device? How would I properly encrypt?

RE: nrf51 Multilink Central and Periph Connection Issue

Petter Myhre — Wed, 11 Feb 2015 12:02:42 GMT

Replace BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&attr_md.write_perm); with BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm); and BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cccd_md.write_perm); with BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);

RE: nrf51 Multilink Central and Periph Connection Issue

k3nt — Tue, 10 Feb 2015 18:01:22 GMT

Thank you for the suggestion Eirik! I think this may be the issue. The MITM bit was already set to 0 and SEC_PARAM_IO_CAPABILITIES to BLE_GAP_IO_CAPS_NONE in the periph. It the MITM bit was set to 1 and SEC_PARAM_IO_CAPABILITIES to BLE_GAP_IO_CAPS_NONE in the central, which I tried setting to 0. But still no success...

RE: nrf51 Multilink Central and Periph Connection Issue

Petter Myhre — Tue, 10 Feb 2015 12:58:01 GMT

I have tried to reproduce this with two new dongles, but it seems to be working. Could you try to sniff the connection to see what is happening on the air? Please see this if you are not familiar with our sniffer.

RE: nrf51 Multilink Central and Periph Connection Issue

Eirik Aa — Tue, 10 Feb 2015 09:11:27 GMT

There is a bug in the S130 with hadling the LTK ( Long term key ) that I have seen cause connect and disconnect problems. You could try to disable the security ( no encryption ) and see if that helps on your problem.

RE: nrf51 Multilink Central and Periph Connection Issue

k3nt — Mon, 09 Feb 2015 17:57:18 GMT

I just did another experiment which I found very odd. I put the untouched multilink central and periph demos on the new dongles(pca10031) with the same results as usual, Connect then disconnect. Next I put the untouched multilink central on the pca10028 and the pca10031 with the peripheral worked. Next I unplugged the pca10028 and re-powered the pca10031 with the central and it connected this time fine. This is really leaving me clueless. It doesn't seem to be related to something in my code.

RE: nrf51 Multilink Central and Periph Connection Issue

k3nt — Mon, 09 Feb 2015 17:17:31 GMT

The old peripheral device only worked with the central on the new device when using old firmware that I copied from the working central. I will report back soon if the peripheral with the new dongle works on the old central. I have updated my question with the complete project files. Thank you!

RE: nrf51 Multilink Central and Periph Connection Issue

Petter Myhre — Mon, 09 Feb 2015 16:33:12 GMT

Does the old peripheral device work with the central on both of the new dongles? Does the old central device work with the peripheral on both of the new dongles? Could you share your complete projects together with the SDK version and SoftDevice versions you are using? Please update the question to include the information.