You can try reusing the SSL_fingerprint option from IO::Socket::SSL , as the documentation says:
The object oriented interface does support explicit SSL configuration. See IO::Socket::SSL for a comprehensive overview of all the options that can be supplied to the constructor, new.

The option's documentation starts with

Sometimes you have a self-signed certificate or a certificate issued by an unknown CA and you really want to accept it, but don't want to disable verification at all.
which seems to be relevant.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Self-signed certificates and Net::MQTT::Simple::SSL by choroba
in thread Self-signed certificates and Net::MQTT::Simple::SSL by mldvx4

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