tldr; I'm going to say that Cassandra is probably the better choice for you.
may be lots of sensors including Camera for photos or Videos] - Where data flow is huge.
Due to its log-based nature, tracking sensor data is a good use case for Cassandra. The ability to handle large amounts of write throughput is a strength of Cassandra, and you can scale ...
Here are basic comparisons of some protocols mentioned above:
Messaging Technologies for the Industrial Internet and the Internet of Things Whitepaper (PDF)
Internet of Things: protocols war!
Choosing Your Messaging Protocol: AMQP, MQTT, or STOMP
IoT Protocol Wars: MQTT vs CoAP vs XMPP
Beyond MQTT: A Cisco View on IoT Protocols
Understanding The Protocols ...
CISCO packet tracer ver 8. It has a full IoT simulating capabilities (e.g., lambs, ceiling fans, clever windows, etc.) Relatively easy to set up your first project. Huge disadvantage: It uses Wi-Fi protocol only (802.11x), hence, it does not support point-to-multipoint (or hop-to-hop) topologies (at least not easily).
NS-2, NS-3, free, academic, does ...
What kind of protocol(s) are you using? If RPL is an option, then you can quickly start with Contiki OS, which has a simulator (Cooja) to run your experiment. NS2 (for Linux) is a much more open and general simulator with very big capabilities.
Fix for a bad SSID on a sonoff tasmota device.
I used a raspberry pi with wifi for these steps. Your mileage may vary.
sudo apt install aircrack-ng wireshark-gtk
Good idea to reboot now
Disconnect from any wifi networks. Disconnect from any wired networks.
sudo airmon-ng check kill
This will kill wpa supplicant and a couple of other processes.
Repeat step ...