How to check if webOS TV is enabled or not

devmode

# if developer mode app is installed on the webOS TV.
# it will open several ports for communicating with SDK like CLI (command line interface) tools.

# if sdk doesn't work properly with dev-mode-enabled TV, 
# you can check if the ports are opened.

###  Linux / OSX(mac)
# Using netcat, you can check the following ports.

## 1. Check 9922 tcp port  ##
# Developer mode app  > 'Dev Mode Status' - On (tv'll reboot)
# Let's say tv-ip is 192.168.1.230

$ nc -v 192.168.1.230 9922

# (Normal Case)
# if tv is enable for dev-mode, 9922 port is opened.
# The following output will be printed.
found 0 associations
found 1 connections:
 1:	flags=82<CONNECTED,PREFERRED>
	outif en5
	src (host-machine-ip) port (random-port)
	dst 192.168.1.230 port 9922
	rank info not available
	TCP aux info available

Connection to 192.168.1.230 port 9922 [tcp/*] succeeded!

# (Unexpected Case)
nc: connectx to 192.168.1.230 port 9922 (tcp) failed: Connection refused

## 2. Check 9991 tcp port ##
# Developer mode app  > 'Key Server' - On (This is configurable when tv is enabled for dev-mode.)

$ nc -v 192.168.1.230 9991

# if tv is enable for dev-mode, 9991 port is opened.
# The following output will be printed.
found 0 associations
found 1 connections:
 1:	flags=82<CONNECTED,PREFERRED>
	outif en5
	src (host-machine-ip) port (random-port)
	dst 192.168.1.230 port 9991
	rank info not available
	TCP aux info available

Connection to 192.168.1.230 port 9991 [tcp/osm-oev] succeeded!

# (Unexpected Case)
nc: connectx to 192.168.1.230 port 9991 (tcp) failed: Connection refused

Windows netcat.
https://eternallybored.org/misc/netcat/

Even though the ports are opened, if the key is not downloaded via "ares-novacom" CLI command,
Please reset the TV.

Setting (Remote Controller) > All Settings > General > Reset to Initial Settings