Develop Reference

telnet on hosted machine running on azure devops pipeline

Here is my detail about my problem:
what I want to achieve:
create a pipeline on azure DevOps, containing tasks
create android emulator with internet condition full
run some tests
connect telnet
connect telnet to android console port- send command to android device to change nework condition to low bandwidth as mentioned here (https://developer.android.com/studio/run/emulator-console)
Note: I have hosted MacOS, also telnet+expect and spawn is installed over it
What is the problem:
My android device is running over 5037 port
telnet task output showing me "telnet connected to local host" command I am using to connect to android console port is : telnet localhost 5037 (in a command line task)
escape character is "^]"
**
it is not showing me any authentication required message or OK so I can go ahead with it, also I am trying to send command like expect"^]" returning me nothing
**
I want to run emulator -netspeed gsm #Pixel_API_26 please help

Android Studio telnet console missing "network" and "window" command?

I'm trying to play around with connecting to an Android emulator through telnet, following the guidance of this page: https://developer.android.com/studio/run/emulator-console.html
I successfully connected to localhost:5554, authenticated with the token found in /Users/me/.emulator_console_auth_token, and got a list of available commands:
$ telnet localhost 5554
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Android Console: Authentication required
Android Console: type 'auth <auth_token>' to authenticate
Android Console: you can find your <auth_token> in
'/Users/me/.emulator_console_auth_token'
OK
auth 123456789XYZ
Android Console: type 'help' for a list of commands
OK
help
Android console command help:
help|h|? print a list of commands
crash crash the emulator instance
kill kill the emulator instance
quit|exit quit control session
redir manage port redirections
power power related commands
event simulate hardware events
avd control virtual device execution
finger manage emulator fingerprint
geo Geo-location commands
sms SMS related commands
cdma CDMA related commands
gsm GSM related commands
rotate rotate the screen by 90 degrees
However, I noticed that network, window and vm commands mentioned in that page are not in this list. How do I get to run those commands?
Thank you very much in advance!
Matt

this option is available while running the emulator in android studio 2.3.1

Install Apk in specific emulator

Im trying to install an apk on an specific emulator using TeamCity. Right now I`m starting an emulator an installing the apk successfully.. but if there is already one or more instances of the emulator running, team city cannot decide in which emulator install the apk (even when I'm starting the emulator from teamcity scripts).
The problem is that I cannot identify the emulator I just started using:
emulator -adv myEmulator
it will start an emulator between ports 5554 to 5587... I know I can set the emulator instance where I want to install my apk:
adb -s emulator-5554 install path/apk
but I don't know the id of the emulator I just started, so it could have any number in its name between that range.
I know I can set an UUID to the emulator (from here), but again.. don't know how to use that uuid.
Right now I will try to save the available emulators before I run my own using BATCH, and then compare both arrays to get my emulator.. but I'm not an expert on BATCH.. so if anyone has a clue it's gonna help,
Regards

You seem to look for -s option of adb:
-s <specific device> - directs command to the device or emulator with
the given serial number or qualifier.
other useful options:
-d - directs command to the only connected USB device
returns an error if more than one USB device is
present.
-e - directs command to the only running emulator.
returns an error if more than one emulator is
running.
and in general adb -h to see them all.
EDIT
You can define what port you want emulator to use:
-ports <consoleport>,<adbport> TCP ports used for the console and adb bridge
so you can assign ports manually and do not bother guessing. to avoid port collisions you can either force ports for all emulators launched (you should not have more than i.e. 3 running at the same time usually) or you can choose high port numbers for your range, high enough so even any other emulator is launched it will be using available ports below your range.
Alternatively you can parse emulator log produced when use with -verbose switch as you can find there:
emulator: control console listening on port 5554, ADB on port 5555
emulator: sent '0012host:emulator:5555' to ADB server
If you want to save emulator log to specific file, use regular stream redirection:
emulator -verbose #MyAVD > log.txt

Running android emulator as server

I want to receive the AT command from android emulator and send the reply back from TCP client program which is written in C.
I am running Android ICS emulator on ubuntu-10.4 system as server by giving command "emulator -shell-serial tcp::4444,server" and in another terminal I am running TCP client written in C trying to connect to the same port.
I am able to see the emulator GUI coming up but I am not receiving any AT command in client.

I got the answer, in the emulator command i need to pass -radio instead -shell-serial. now I am able to receive all the AT commands in my client program

Can not use telnet localhost 5554 to connect Android emulator

I can't use the command telnet localhost 5554 to connect Android emulator.
Always get this error:
Connecting To localhost...Could not open connection to the host, on port
5554: Connect failed
I even have all ports set to allow connections in both the inbound and outbound rules in Windows Firewall.
I am running Windows 7.

I've encountered this issue a few times, I'm not sure how the the emulator deals with addresses, but localhost just doesn't work for me.
Changing the connection command to telnet 127.0.0.1 5554 enabled me to connect, so if localhost doesn't work, try 127.0.0.1

Try using the complete command inside telnet:
Microsoft Telnet> open localhost 5554
That should work, sometimes we forget to write the entire command

Use the netstat tool to verify the application is listening on that port. I'm not familiar with netstat on windows, but it seems you'll need -a -n and optionally the -o options.
If you see the process listening, keep looking at the firewall. If you don't see one, figure out why it's not running.

Firstly ... you should enable Telnet command in windows .
check this
http://www.labnol.org/software/windows-telnet-command/18222/
then it will work :)

first simply type telnet to your command prompt
Microsoft Telnet> open 127.0.0.1 5554
above line might show you following result
Android Console: Authentication required
Android Console: type 'auth ' to authenticate
Android Console: you can find your in C:\Users\YOURPCNAME.emulator_console_auth_token'
OK
then go into your 'c' drive then user where you find .emulator_console_auth_token
open that file and put you auth token like below
auth ################
then you find
Android Console: type 'help' for a list of commands
OK
it means you are connected now..

If "telnet localhost 5554" doesnt work, try using port 5037.
Also ensure that the Emulator is running.

In cmd: you press cd D:\Android\sdk\platform-tools. It is path to platform-tools in your computer. After you can input telnet localhost 5554
redir add udp:9876:9876 or redir add tcp:5000:6000