Ignition Edge MQTT is a platform MQTT enabling field devices to communicate using the MQTT protocol.  The following diagram shows how Igntion Edge MQTT could be used at the edge of a network.  Ignition Edge MQTT turns any device, touch panel, rack-mount server, or client terminal into an edge gateway, with no limit on the number of tags. Edge MQTT converts data from connected PLCs and RTUs into MQTT and publishes it to an MQTT broker in a way that can be easily received by the MQTT Engine Module.  More information and pricing can be found here.