# Spark core has a problem connecting to WIFI

**URL:** <https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600>\
**Category:** Troubleshooting\
**Created:** [July 22, 2015, 6:18am UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600 "2015-07-22T06:18:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![lamefreaks](https://avatars.discourse-cdn.com/v4/letter/l/ce7236/32.png) [@lamefreaks](https://community.particle.io/u/lamefreaks)\
**Post date:** [July 22, 2015, 6:18am UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600/1 "2015-07-22T06:18:57Z")

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I have a spark core which has problem connecting, to the WiFi network. It keeps flashing green, also tried replacing the WiFi router both are 802.11bgn. Also tried connecting different Cores, same problem with each also tried.

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**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\
**Post date:** [July 22, 2015, 8:06am UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600/2 "2015-07-22T08:06:30Z")

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What i would do is to perform a CC3000 patch first.

See: [[Spark core] Common issues](https://community.particle.io/t/spark-core-common-issues/12383/10)

If there are multiple cores not connecting, make sure channel is lesser than 11 and try b/g only.

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**Author:** ![lamefreaks](https://avatars.discourse-cdn.com/v4/letter/l/ce7236/32.png) [@lamefreaks](https://community.particle.io/u/lamefreaks)\
**Post date:** [July 22, 2015, 12:50pm UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600/3 "2015-07-22T12:50:06Z")

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I googled around and already tried flashing CC3000, which is dated at 06-2014. Is there any newer version of this patch. My WiFi channel is 2.

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**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\
**Post date:** [July 22, 2015, 1:32pm UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600/4 "2015-07-22T13:32:51Z")

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Try using **b/g** only.

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<div class="post-metadata">

**Author:** ![lamefreaks](https://avatars.discourse-cdn.com/v4/letter/l/ce7236/32.png) [@lamefreaks](https://community.particle.io/u/lamefreaks)\
**Post date:** [July 23, 2015, 6:43am UTC](https://community.particle.io/t/spark-core-has-a-problem-connecting-to-wifi/13600/5 "2015-07-23T06:43:55Z")

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Hey, Using only b/g did the trick.  
Thank You