Why did watchport/H host (digi .com) sensor cannot received data via serial port in mango?

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I have a watchport/H host (digi .com) sensor for temperature and humidity test.

the com port is com11.
what have I try:

Below is use "device Monitoring studio" to view the data .
00000001 12.09.2014 17:30:06.476 PnP Event: Connect DOWN 0x00000000 5c 00 3f 00 3f 00 5c 00 45 00 64 00 67 00 65 00 53 00 65 00 … .?.?..E.d.g.e.S.e.…

00000002 12.09.2014 17:31:17.237 +70.761 IRP_MJ_WRITE DOWN 0x00000000 54 T

00000004 12.09.2014 17:31:18.209 +0.969 IRP_MJ_WRITE DOWN 0x00000000 0d .

00000007 12.09.2014 17:32:00.772 +40.704 IRP_MJ_WRITE DOWN 0x00000000 49 I

00000009 12.09.2014 17:32:02.028 +1.254 IRP_MJ_WRITE DOWN 0x00000000 0d .

00000011 12.09.2014 17:32:02.068 +0.037 IRP_MJ_READ UP 0x00000102 57 00 61 00 74 00 63 00 68 00 70 00 6f 00 72 00 74 00 2f 00 … W.a.t.c.h.p.o.r.t./.…

00000031 12.09.2014 17:35:55.002 +0.737 IRP_MJ_READ UP 0x00000102 2b 33 30 2e 36 32 35 30 43 0d +30.6250C.
00000033 12.09.2014 17:36:25.185 +30.182 IRP_MJ_WRITE DOWN 0x00000000 48 H

00000035 12.09.2014 17:36:26.159 +0.971 IRP_MJ_WRITE DOWN 0x00000000 0d .

00000037 12.09.2014 17:36:27.297 +1.137 IRP_MJ_READ UP 0x00000102 34 32 25 0d 42%.

use script for test and have no data to received and display.

in "information events" and "urgent events" button display "'WatchportHScriptDS': Wrapped java.lang.NullPointerException
at line: 1, column: -1".

the attachment is the picture of error and script.

Please give suggestion.

Thank very much!

Attachment: download link

are you confirm your script syntax is official support? ""script":"watchportComm.set("H\r");","

As show in the attachment.

when I click "Script" button,and display "Setting point Send to H " in red circle.

How to solve it ?

Appreciate!

BR

Attachment: download link

Please give me idea.

:) :) :)

the below is from ma.log.

ERROR 2014-10-07 16:37:54,078 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:54,085 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:54,092 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:54,100 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,074 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,081 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,088 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,095 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,102 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:55,110 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,083 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,091 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,098 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,105 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,112 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:56,120 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:57,093 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException
ERROR 2014-10-07 16:37:57,100 (com.infiniteautomation.io.serial.JsscSerialPortInputStream.serialEvent:134) - java.lang.NullPointerException

Attachment is from Background for every Hotshots reference.

Attachment: download link

Thanks for share…