Hello.
Sorry for probably the basic questions, but I am rarely getting back to the devices nowdays. 
I have a few “wAP RBwAP2nD”, which I would like to use as APs.
The main router is Mikrotik as well ( 4011 ).
All APs will be wired to the main router.
The idea is everywhere I go around the range of the APs to not need to switch the SSID of the network all the time, but to be switched automatically.
How to do that ?
( once again thank you in advance )
Simply set all APs with same security settings. Those include SSID, authentication types and password.
Beware that when wireless station roams between APs having same SSID, it expects that the new AP is member of same L2 network (ethernet). Which basically means that APs have to act as simple switches/bridges between wired network and wireless. They should not run any higher layer services, such as DHCP server or routing or firewall.
If you’re planning to have more than a few APs, then you might want to run CAPsMAN, your RB4011 is a good candidate to run it on. In this case all APs get their settings from CAPsMAN.
So.. they replaced the 4011 with Mikrotik CRS326-24G-2S+RM ..
I went there to install the AP’s.
I setup the Capsman on the CRS326-24G-2S+RM. ( at least i tough so ).
Then I rest the AP’s by holding the reset button, so they enter in CAPs mode.
They seems asquired their managing from the CRS326, but .. i cant connect to them.
I see the wifi network , but when i try to connect to it - it stays on “connecting”, and drop at some point as timed out.
On the CRS326 i saw that “TX Signal” is always 0, and at this point i have no idea what i am doing wrong.
Please… help..
Share config (of the CRS):
/export file=anynameyoulike
Remove serial and any other private information (and place the output here between code tags </> button)
Have you followed this tutorial:
https://help.mikrotik.com/docs/pages/viewpage.action?pageId=1409149