Connecting to 2.4G when both 2.4G and 5G network is available

[Johncy Bennette]

Hi,
I have a router that is broadcasting the same SSID on both 2.4G and 5G
networks. My requirement is if a router has only 5G then my device has
to connect to the router. If the router has both 2.4Ghz and 5Ghz, how
can I tell my device to stay connected to 2.4G. Is there any
configuration in wpa_supplicant to achieve this?

Regards,
Johncy.