Currently the BLE dongles released by Cypress only support single connection, along with the usage of CySmart application.
If you plan to use CySmart with the dongle? If not, maybe you can change to use a PSoC BLE DVK board to simulate a central device with multiple connections.
we are not going to use CySmart, it's only for evaluation, but if a cypress ble (bluetooth 4.2, not limited to CY5677) dongle supports multiple connections, we will buy some dongles and use it in production (we will develop a software by ourselves), it saves time for us.
But, according to your answer, it seems the only way to get a multi-connection-BT4.2 dongle is to develop one on our own. ...
Sorry for late response.
CY5677 is not proper enough for the production on customer's end. It can not support multiple connections and the source code is not available. For custom usage scenario, customer needs to develop their own application.