Foscam camera connection

I have 2 Foscam security cameras I can't get hooked up to the modem/router after numerous tries by both wired via eithernet cable and wift.

One is Foscam R2 the second is a F19826P 

The Foscam cameras will only work of of 2.4GHz the modem/router puts out 5GHz also could this be an issue.

I am using an iMac with the latest update.