Disable 5GHz band for 88W8987

[adrianwojak]

Can someone guide me how to disable the 5 GHz band for the 88W8987 module? Can this be done by modifying the file ed_mac_ctrl_V2_8987.conf, convert to a binary file and use init_hostcmd_cfg parameter to load file?

[cdoumenc · Accepted solution]

On page https://www.nxp.com/products/wireless/wi-fi-plus-bluetooth-plus-802-15-4/2-4-5-ghz-dual-band-1x1-wi-... you will find doc UM11513 (Getting Started with 88W8987-based Wireless Module on i.MX 8M Nano EVK Running Linux OS - User manua...) in which chapter 5.1 "Load the modules" is mentioning configuration file wifi_mod_para_sd8987.conf used at driver loading stage.
In this conf file, you can use dev_cap_mask = 0xffffdbff to disable 5GHz modules (needs cfg80211_wext=0xf)

[cdoumenc]

To accurately answer your question, I need to know in which mode you are using 88W8987 : Access Point or Station ?

[adrianwojak]

I use AP mode, but also I would like to limited to connect only 2,4GHz networks in Client mode. My device don't have certification for 5GHz, that's way I want to limited connection in this band.