I've been using mqtt and Node RED to update my weather station data to Weather Underground. It was working well until yesterday when I started getting the following error from the http request node: "Error [ERR_TLS_CERT_ALTNAME_INVALID]: Hostname/IP does not match certificate's altnames: Host: rtu…

Confirmed problem still occurred with a different internet connection (mobile network). New installation on a 2nd Raspberry Pi - same error messages. Copied http request from Node-RED and sent from browser on Win 10 PC - success updating WU from browser with no error messages. Sent support reques…

Well, hard to say properly without digging further but it looks at first sight as though either they, you or some nasty person in-between is doing a man-in-the-middle termination of TLS. That's to say that the certificate is now valid for servers that probably sit somewhere between you and WU but n…

Thanks for your reply. The error message has changed to 'UNABLE_TO_VERIFY_LEAF_SIGNATURE' displayed under the http request node and "Error: unable to verify the first certificate" in the Debug window. Not sure where to go with this but I'll keep searching. Any other advice appreciated.

Sorry, but I think you will have to take this up with WU. The only other thing I can think of to try on your end would be to switch your Internet connection - say to a mobile network - to see if the issue still happens (I think it will but there is always a small possibility it is your ISP).

Ok, I'll try that and then WU. Thanks.

[image] JohnMM: Perhaps a problem with SSL certificate on the Weather Underground server that they've now fixed? Oh yes, for sure.

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Http request node :Err_tls_cert_altname_invalid

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Http request node :Err_tls_cert_altname_invalid

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