Update tradfri.markdown (#12481)

* Update tradfri.markdown

Might I add, that it seems like a good idea to me, to add some error message in the GUI stating "wrong security key" or something similar, instead of doing visually nothing?

* ✏️ Tweak

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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Azimoth 2020-03-23 11:40:05 +00:00 committed by GitHub
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@ -47,6 +47,10 @@ allow_tradfri_groups:
## Troubleshooting
### Incorrect security key
`Fatal DTLS error: code 20` might indicate a missing or incorrect security key. Pay close attention as e.g., "I" and "l" can easily be confused.
### Firmware updates
After updating your IKEA Trådfri Gateway firmware it might be necessary to repeat the configuration process. One error you might experience after a firmware update is `Fatal DTLS error: code 115`. If you encounter problems: