It’s not entirely clear what you’re asking here, so I’ll answer both possibilities. The length of the actual topic string is at most 65536 bytes. This is a limit imposed by the mqtt spec, you can’t change it. It is also worth noting that the topic is encoded with utf-8, so you may have less … Read more
You can solve this by setting captive_portal_detection_enabled to 0 (false). What’s actually happening is that by default, everytime you connect to a wifi, the FW will test against a server (typically google) to see if it’s a captive wifi (needs login). So if your wifi is not connected to google, this check will fail. After … Read more
The main motive behind Kafka is scalability. MQTT is a protocol with public specification for lightweight client / message broker communications, allowing publish/subscribe exchanges. Multiple implementations of client libraries and brokers (Mosquitto, JoramMQ…) exist and are virtually compatible. MQTT just specifies the transport, and vaguely the application part (i.e. how data is handled and possibly … Read more