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 detect local connection state? How do I authenticate subscribers? Does PubNub provide user interface or content filtering? How do I enable the channel presence feature? How are Monthly Active Users counted?