Server unavailable error

[buzzstardust]

Hello

I have some trouble connecting my device.
The error message i get tells me that server is unavailable. But i can connect with MQTT explorer.

$DBG072:23060:7 MQTT: AWS MQTT Connect Error: -39

My device doesn’t support username and password. Only certificates.
I have enabled SCI authentication for this particular client.

As for the rootca i have followed the following link.

How to locate Root Certificate to complete Chain Trust for TLS connection on 8883 ESP32 Chip

Hi there, i playing with mqtt and ESP32 CHIP. I would like to connect in most secure way so i thought maybe try with TLS connection at the beginning and later i could also encrypt data which is sent to broker. I successfully managed to connect with mosquitto on linux using /etc/ssl/certs path to CA certificates. I would like now to copy the certificate i need into flash memory that my app written in C can use it while it connects to broker on port 8883. How can i guess which one CA is the …

Thank you in advance

[buzzstardust]

Sorry for the message. I got it working.
On the device I got the client id wrapped in qoutes.