How do I create device interaction on a geo grid? Craig Conover February 16, 2021 07:49 Updated Geohashing Chat by User Proximity Tutorial is the best place to start to learn more about Geo Grid Device Interactivity. Related articles How do I authenticate subscribers? How do I detect local connection state? Does PubNub provide user interface or content filtering? How are Monthly Active Users counted? What client libraries (SDKs) are currently supported?