MQTT

ClosedMQTT An open communications protocol for the Internet of Things (IoT). MQTT is not an acronym, it is simply the name of the protocol. Source: https://www.hivemq.com/blog/mqtt-essentials-part-1-introducing-mqtt/ is an open communications protocol often used in the Internet of Things (IoT). This protocol is supported in all current Campbell Scientific data loggers, including the GRANITE 9/10, CR6, CR1000X series, CR350 and CR310. MQTT uses a publish/subscribe architecture to send and receive data. A broker facilitates the communications between publishers and subscribers by receiving published messages and distributing them to subscribers. One advantage of MQTT is that communications are initiated by the data logger so firewalls do not cause problems. For full MQTT specifications see: https://mqtt.org/ .

Transmitting data (JSON) from data loggers to a server