# Solved : Serial communication impossible

**URL:** <https://community.particle.io/t/solved-serial-communication-impossible/832>\
**Category:** Troubleshooting\
**Created:** [December 19, 2013, 10:16am UTC](https://community.particle.io/t/solved-serial-communication-impossible/832 "2013-12-19T10:16:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Thomas](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/thomas/32/2165_2.png) [@Thomas](https://community.particle.io/u/Thomas)\
**Post date:** [December 19, 2013, 10:16am UTC](https://community.particle.io/t/solved-serial-communication-impossible/832/1 "2013-12-19T10:16:02Z")

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Hi there,

Just received my Core this morning, looks really good (and super tiny !) but I can’t make it works. I first tried the laziest way of downloading the Android App and make it works with just a click, didn’t work. It’s strange because after flashing green for several minutes, it’s now breathing cyan, but I can’t see the core in my “cores list”.

Then I tried moving on USB configuration. The device is correctly plugged and seems to be connected to the net (because it’s breathing cyan), but I can’t see the serial device in the list.

I’m running OSX 10.9, my WiFi network is secured by WPA2-PSK and of course, CoolTerm for serial port term app.

What can I do ?

Thanks,  
Thomas

EDIT : After flashing the WiFi memory several times, it finally works. Dunno the reason and being curious, is there any logs stored in the mem of the core ?

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**Author:** ![mrOmatic](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mromatic/32/66_2.png) [@mrOmatic](https://community.particle.io/u/mrOmatic)\
**Post date:** [December 19, 2013, 10:50am UTC](https://community.particle.io/t/solved-serial-communication-impossible/832/2 "2013-12-19T10:50:28Z")

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I had a similar problem and it just turned out to be me being impatient and not letting the core finish updating and reseting before i started hitting the reset button or reflashing the core.

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**Author:** ![Thomas](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/thomas/32/2165_2.png) [@Thomas](https://community.particle.io/u/Thomas)\
**Post date:** [December 19, 2013, 12:09pm UTC](https://community.particle.io/t/solved-serial-communication-impossible/832/3 "2013-12-19T12:09:12Z")

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Thanks for the reply 🙂 I was impatient too… but I thought it was OK because the LED stopped flashing magenta and was breathing cyan… but everything is now working perfectly.

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**Author:** ![will](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/will/32/23374_2.png) [@will](https://community.particle.io/u/will)\
**Post date:** [December 20, 2013, 7:33pm UTC](https://community.particle.io/t/solved-serial-communication-impossible/832/4 "2013-12-20T19:33:02Z")

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@Thomas,

Glad to hear it! Let us know if you run into any other roadblocks.

Will @ Spark