diff --git a/10 Notes/Codex Encryption Design.md b/10 Notes/Codex Encryption Design.md
index edc6780..38aaaef 100644
--- a/10 Notes/Codex Encryption Design.md	
+++ b/10 Notes/Codex Encryption Design.md	
@@ -25,4 +25,5 @@ If storing 512 bits (as opposed to a 256 bit minimum) of key material is a probl
 Some context info:
 
 - [bearssl](https://bearssl.org/)
-- [bearssl Nim bindings](https://github.com/status-im/nim-bearssl)
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+- [bearssl Nim bindings](https://github.com/status-im/nim-bearssl)
+- A nice example of using BearSSL encryption API (Arduino) https://github.com/kakopappa/esp8266-aes-cbc-encryption-decryption/blob/main/esp8266-aes-cbc-encryption-decryption.ino
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