Hello @Jimis ,
Thank you for the interest in HiveMQ!
To confirm, has this device been able to connect successfully in the past? Additionally, could you please share as much configuration detail as you feel comfortable with? I’d like to see the way the host to connect to is configured.
In the event that there is a certificate issue occurring, we also have a thread here that has some details regarding certificate configuration for ESP32 devices.
Best,
Aaron from HiveMQ Team