Added TLS secured MQTT example for ESP32 and Mosquitto communication.

[norbertg1]

I spent long hours to make working TLS encrypted communication with ESP32 <----> Mosquitto broker (MQTT) also opened for that an issue where others too suffered from a similar problem: arduino-esp32/#5021

I decided to make a useful example, I hope it can be useful in the future, please include it.

The mqtt_ESP32_TLS.ino source file also contains a short manual. The certificates/certificate_generator.sh is an easy tool for generating certificates.

[roysG]

Thanks for your help to integrate it with wifi! Can you also give us an example of use with tinyGsm library when using with some network module? Thanks

[norbertg1]

Thanks for your help to integrate it with wifi! Can you also give us an example of use with tinyGsm library when using with some network module? Thanks

I dont know tinyGsm library, I cannot help. You must do it on your own.

[googidaddy]

i'm using your example and an issue occured... error:Unknown error code (0050) state: -2 And i test the mosquitto broker, it work.

[googidaddy]

i'm using your example and an issue occured... error:Unknown error code (0050) state: -2 And i test the mosquitto broker, it work.

oh sorry, it is server error, port 1883 has been attacked.

[treponix-jp]

hi

I used your script and played arround for quite some time also with PROGMEM etc. I seem to have a problem with the certs and keys.

Following error: X509 - Certificate verification failed, e.g. CRL, CA or signature check failed

I used the exact same ca.crt esp.crt and esp.key with testing tool MQTT.fx where it works, also working on Raspberry pi.

Maybe you can give me a hint!

BR

[norbertg1]

Please consider merging to to the main branch. That example could be very usefull for people looking for TLS encryption in MQTT communication.