I’ve faced some issues when I was trying to discovery OrangePi SoC (OrangePi Zero LTS) with Armbian image installed on it.

OrangePi discovery

I was using nmap on MacOS to ping devices on network.

This command show only localhost

nmap -sP 192.168.3.1/28
###
Starting Nmap 7.91 ( https://nmap.org ) at 2021-04-23 21:11 MSK
Nmap scan report for 192.168.3.1
Host is up (0.00064s latency).
Nmap done: 16 IP addresses (1 host up) scanned in 1.48 seconds

But sudo gives me all I need.

sudo nmap -sP 192.168.3.1/24
###
Starting Nmap 7.91 ( https://nmap.org ) at 2021-04-23 21:12 MSK
Nmap scan report for 192.168.3.5
Host is up (0.00038s latency).
MAC Address: 02:42:FC:C4:F3:2F (Unknown)
Nmap scan report for 192.168.3.1
Host is up.
Nmap done: 16 IP addresses (2 hosts up) scanned in 1.44 seconds

I’ve inserted ethernet cable as link and USB cable as power supply. Network was found if simple ifconfig command under bridge100 interface.