Add troubleshooting guide for cross-subnet communications

[domibarton]

This troubleshooting guide is the result of the outcome of issue #422.

Please have a look at the issue for more insights:
#422

[domibarton]

If @cnrd tells me the name of his device, I can add it to the list before merging.

[coveralls]

Coverage remained the same at 72.461% when pulling 4d33ef2 on confirm:troubleshooting-guide into 6b2ce47 on rytilahti:master.

[cnrd]

This is the device: https://www.home-assistant.io/components/remote.xiaomi_miio/ the internal name in various pieces of code is chuangmi_ir.

[rytilahti]

Looks good, thanks! :-) You could add a link to the issue in case someone wants to read more about how you came to these conclusions.

[domibarton]

Looks good, thanks! :-) You could add a link to the issue in case someone wants to read more about how you came to these conclusions.

good point

[domibarton]

This is the device: https://www.home-assistant.io/components/remote.xiaomi_miio/ the internal name in various pieces of code is chuangmi_ir.

@cnrd thanks, mentioned it in the docs!

Looks good, thanks! :-) You could add a link to the issue in case someone wants to read more about how you came to these conclusions.

@rytilahti added the link in the notes and pushed the branch again…