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I think you can use the Cisco Meraki Dashboard API.Take a look at this: https://documentation.meraki.com/zGeneral_Administration/Other_Topics/The_Cisco_Meraki_Dashboard_APIYou can export data so you can manage them as you want.
This may help! https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/Wireless_fundamentals%3A_Signal-to-Noise_Ratio_(SNR)__and_wireless_signal_strengthAbout if the avg latency is normal, it depends on your LAN solution, but the transmit ...