docs(ssl): Update TLS/SSL certificate fingerprint instructions - #177
Merged
Conversation
brentru
approved these changes
Jan 21, 2026
| * SSL certificate every year. If adding Secure MQTT to your ESP8266 project is | ||
| * important - please switch to using the modern ESP32 (and related models) | ||
| * instead of the ESP8266 to avoid updating the SSL fingerprint every year. | ||
| * instead of the ESP8266 to avoid updating the SSL fingerprint every 6months. |
| // latest fingerprint can be generated with | ||
| // echo | openssl s_client -connect io.adafruit.com:443 | openssl x509 | ||
| // -fingerprint -noout | ||
| /* NB: io.adafruit.com TLS/SSL certificate changes every 6months, and pinning |
Member
|
@tyeth Could you plz take another look at this PR? |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Certificates for IO.adafruit.com are changing to a 6month validity, and it's felt that fingerprinting should no longer be recommended, but instructions updated as a large number of esp8266 users still exist on the IO platform.
Relates to:
https://3.basecamp.com/3732686/buckets/17625714/todos/9458087406