Embedded Systems Penetration Testing

I am an embedded software engineer and as more devices become connected (IoT) I am becoming more and more concerned embedded systems security. I used Kali Linux, Metasploit and Armitage for less than four hours and discovered a security issue for a client. In this case they had done everything right but even so they had a problem. Any clue where I can learn more about specific issues involved in embedded systems security? I am also very interested in learning reverse engineering (looking forward to the course here) especially with ARM architecture. Thanks in advance for any help and general comment. If this is still of interest to you, you might be interested in the training at Tactical Network Solutions: https://www.tacnetsol.com/collections/live-training It is thanks. At this time I have a very tight deadline perhaps next classes. Thanks for the info. Try https://microcorruption.com/ Very interesting game about some aspects of embedded security.