For the CYW43438 chipset, how many STA (client devices) can be supported while in AP + STA mode?
This chip is attached to a remote Access Point as as a STA client plus it also serves as an access point (AP) for other nearby STA clients.
How many of these nearby STA client devices can be connected? Is it a hardware or drive/firmware limitation?
You can use the wwd_wifi_get_max_associations API to check. As your STA interface is associated with an AP, softAP interface can support (max_assoc - 1) associated clients. You can use the get_associated_sta_list in test.console example to check the same for your device.
I am using Raspberry Pi 3B with this chipset and I am not familiar with the WiCED API.
Do you know what the max_assoc value is on Pi 3B running Raspbian Stretch?
Is it stored in a header file or configuration file for the CYW43438 driver?