Hmm check that the connection to the PI is also secure. It should be 192.168.0.188 or 192.168.1.188. Consider it a unique branding of your miner as Joshua Zipkin stupidly had them configured with unique IPs, which indicates STRONGLY that he mined with this hardware before shipping it as each machine has a unique configuration vs a standard one with a test pool. Instead it was mining at f2pool with the user kusmet which is bulgarian for luck.

But at any rate one of those two IPs mentioned will get you up and running.