You need to enable b/g compatibility on the router/access point, however, this may throttle overall throughput. A technique I’ve used is to install an old, recycled router to establish a separate, unsecured or minimally secured subnet for Pronto. If someone wants to spin their wheels attempting to install ransomware on the Pronto, good luck to them. Of course, this is messy if your Pronto is controlling devices using network commands.