otap error: port is already being used by other program

Cryptik · **Posted:** Sat Jul 07, 2012 5:25 am

I was finally able to get the OTA to work. I did not have OTA code in my test application. Once I added the proper lines, OTA seems to work.

I do still have some issues. It appears that OTA comms are still not reliable. I can issue the following command:

otap -scan_nodes --mode UNICAST --mac 0013A20040769193

and sometimes it reports zero nodes found..and then other times I get the following:
----------------------------------------------------------------
Total Nodes: 1 - Time elapsed: 2s
0 - Node 0013a20040769193 - WASPMOTE00000001 - test001 - READY
----------------------------------------------------------------

also... when trying to upload the program, it reported the following:

------------------------------------------------------
Name: myapp.hex
Date: Fri Jul 06 22:13:45 EDT 2012
Size: 70132 bytes
Packets to send: 923
Estimated time: 276.9 seconds
------------------------------------------------------
Node: 0013a20040769193
[Sending] - 100% 807 seconds elapsed
Finished. Number of packets sent: 923
Node response: PROGRAM RECEIVED OK
---------------------------

As you can see, it estimated 276 seconds for the upload but actually took 807 seconds.

Also, the when I run the -get_boot_list command, it shows two programs with the same name, but there is only one on the SD card:

otap -get_boot_list --mac 0013A20040769193 --mode UNICAST

---------------------------------------------
Bootlist Node 0013a20040769193 - length: 2
0 - PID:test001 - Date:2012/07/06 22:13
1 - PID:test001 - Date:2012/07/06 22:13
---------------------------------------------

The otap -reset command works in MULTICAST mode but not in UNICAST mode.

It seems that I may have something misconfigured...but I can tell what it is.

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7818

Cryptik,

We see that you are able to send a program. When you obtain "PROGRAM RECEIVED OK" it means that the program is transmitted ok, that is for sure.

But if you transmit many times a program with same name, the system can become unresponsive. Please check your SD card and delete previous programs, or just change program name.

Regards

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7818

Dear all people related in original issue of this topic.

Waspmote IDE includes by default with its own tx/rx library.

However if you already have another rx/tx library inside Library/Java/Extensions/, it will be used by default by the JVM, and it does not have necessary modifications for using with Waspmote.

So, just delete corresponding file of rx/tx library (rxtx.jar or similar) inside Library/Java/Extensions/

Regards

jgusf · **Joined:** Sun Sep 16, 2012 7:22 pm **Posts:** 13

Hi,

I am having this same error when trying to scan nodes using my macbook pro. I am running mac osx version 10.8.1.

I tried navigating to library/java/extensions but there are no files inside the directory.

What else could I do?

thanks,
jgusf

jgusf · **Joined:** Sun Sep 16, 2012 7:22 pm **Posts:** 13

after a couple of hours of searching I found a solution.

I needed to do the following in the terminal

Quote:

$ sudo mkdir /var/lock
$ sudo chmod 777 /var/lock

Hope this works for anyone else that may run into this problem.

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7818

jgusf,

Glad to hear that.

Thanks for sharing your solution with other people.

Regards