While we support the HOGP profile on the 36/37, we lack the HW Keyscan sample application to use the profile within a keyboard application. I believe GPIOs are also an issue on the 40 pin QFN package. The BCM20738 more GPIOs, but has yet to be enabled through the WICED Smart SDK; We do have a partner (Alltek) in Asian that has a solution today.
HID will also be fully supported on the 20735 (207X9 based) through the SDK later this year.
Thanks for the reply. My plan is to use a FRDM-K64F for all processing, and use the 20737 as a bluetooth bridge, so I'm not sure that GPIOs will be problem. My main concern is that the 20737 isn't correctly advertising itself as a keyboard. Are you saying that HID isn't fully supported in the 20737?
HOGP yes. HOGP in a keyboard implementation, no.