# Will not connect to circuit playground

**URL:** <https://forum.inductiveautomation.com/t/will-not-connect-to-circuit-playground/57969>\
**Category:** Maker\
**Tags:** perspective\
**Created:** [April 2, 2022, 5:45pm UTC](https://forum.inductiveautomation.com/t/will-not-connect-to-circuit-playground/57969 "2022-04-02T17:45:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![WChester](https://avatars.discourse-cdn.com/v4/letter/w/df788c/32.png) [@WChester](https://forum.inductiveautomation.com/u/WChester)\
**Post date:** [April 2, 2022, 5:45pm UTC](https://forum.inductiveautomation.com/t/will-not-connect-to-circuit-playground/57969/1 "2022-04-02T17:45:20Z")

</div>

I have been trying to connect to a adafruit cuicuit playground via the USB serial connection. I’ve set up a gateway timer script:  
system.serial.openSerialPort(‘COM6’)  
data=system.serial.readBytesAsString(‘COM6’, 115200 ,250, ‘UTF-8’)  
system.tag.write(’[default]open\_serial’,data)  
system.serial.closeSerialPort(‘COM6’)  
This is not the first iteration of this, but I keep getting this error.

com.inductiveautomation.ignition.common.script.JythonExecException: Traceback (most recent call last): File “”, line 1, in at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.getAndLockSerialPort(SerialScriptModule.java:143) at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.readBytes(SerialScriptModule.java:328) at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.readBytesAsString(SerialScriptModule.java:389) at jdk.internal.reflect.GeneratedMethodAccessor25.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) java.io.IOException: java.io.IOException: Port COM6 has not been opened.

at org.python.core.Py.JavaError(Py.java:547)

at org.python.core.Py.JavaError(Py.java:538)

at org.python.core.PyReflectedFunction. **call** (PyReflectedFunction.java:192)

at org.python.core.PyReflectedFunction. **call** (PyReflectedFunction.java:208)

at org.python.core.PyObject. **call** (PyObject.java:512)

at org.python.core.PyObject. **call** (PyObject.java:517)

at org.python.pycode.\_pyx10.f$0(:2)

at org.python.pycode.\_pyx10.call\_function()

at org.python.core.PyTableCode.call(PyTableCode.java:173)

at org.python.core.PyCode.call(PyCode.java:18)

at org.python.core.Py.runCode(Py.java:1687)

at com.inductiveautomation.ignition.common.script.ScriptManager.runCode(ScriptManager.java:806)

at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$TrackingProjectScriptManager.runCode(ProjectScriptLifecycle.java:680)

at com.inductiveautomation.ignition.common.script.ScriptManager.runCode(ScriptManager.java:752)

at com.inductiveautomation.ignition.gateway.project.ProjectScriptLifecycle$TrackingProjectScriptManager.runCode(ProjectScriptLifecycle.java:661)

at com.inductiveautomation.ignition.common.script.TimerScriptTask.run(TimerScriptTask.java:92)

at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)

at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)

at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.base/java.lang.Thread.run(Unknown Source)

Caused by: org.python.core.PyException: java.io.IOException: java.io.IOException: Port COM6 has not been opened.

… 22 common frames omitted

Caused by: java.io.IOException: Port COM6 has not been opened.

at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.getAndLockSerialPort(SerialScriptModule.java:143)

at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.readBytes(SerialScriptModule.java:328)

at com.inductiveautomation.ignition.modules.serial.scripting.SerialScriptModule.readBytesAsString(SerialScriptModule.java:389)

at jdk.internal.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.base/java.lang.reflect.Method.invoke(Unknown Source)

at org.python.core.PyReflectedFunction. **call** (PyReflectedFunction.java:190)

… 19 common frames omitted  
Any ideas or what I’m missing.  
Oh by the way the port is not being held by something else as I can connect via terra term.

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<div class="post-metadata">

**Author:** ![WChester](https://avatars.discourse-cdn.com/v4/letter/w/df788c/32.png) [@WChester](https://forum.inductiveautomation.com/u/WChester)\
**Post date:** [April 2, 2022, 6:03pm UTC](https://forum.inductiveautomation.com/t/will-not-connect-to-circuit-playground/57969/2 "2022-04-02T18:03:00Z")

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Ok Figured it out was trying to open in a different spot.