There are dozens of tablets on my table that are all connected to the same 5GHz Wi-Fi network. All IP addresses were given by DHCP in subnet 192.168.34.0/24. I want to find the ip addresses of all of them so that I connect to them and use adb wirelessly. After unlocking all devices and making sure they had enough battery, I tried sudo nmap -sn 192.168.34.1-254. While it found a majority of the tablets, some were missing. Then I tried a broadcast ping with ping 192.168.34.255 -b but got zero responses. However I can manually pick up a tablet, go to its settings find its ip and ping it manually and they always respond. For instance 192.168.34.123 was not found by nmap but ping 192.168.34.123 always works.
Why do some tablets not respond to nmap pings but do respond to manual pings? How can I ensure that all tablets are reachable by nmap? Are there other commands or tools that are more suitable for the job?
