I ran all of those commands. The report from M552 S0 was:
WiFi module started
WiFi reported error: no known networks found
I ran the M587 command and it only gave me an "ok". So I ran M588 S"*", then the M587 command, then M552 S1. M552 S1 reported:
WiFi reported error: no known networks found
WiFi module is idle
So I ran the M587 command once more and was given the same M587: Failed to add SSID to remembered