I placed it a few inches away from my WiFi router, and made sure my Laptop and Mobile phone were at least many feet away. Still no love. It's still flashing green. Looking at my earlier post, I figured I was missing a few dependencies. I have since managed to clean up all of my installation, and can confirm that everything described in this thread How to install the spark toolchain in Ubuntu 14.04 - Getting Started - Particle has been tried, but still unable to connect.
So, in short :
I'm unable to connect to the Core via the Android App. I do a factory reset so it's in listening mode (flashing Blue). Android app detects my SSID, and when I enter PW, the LED on the Spark core turns flashing Green. After a while, the App says - No Cores Found. Try again.
I do a factory reset again, and make sure Spark is in listening mode - flashing blue. I'm able to use the Spark CLI "spark setup" and set up my SSID, Security and PW. CLI response is :
Thanks! Wait about 7 seconds while I save those credentials...
Serial said: Awesome. Now we'll connect!
If you see a pulsing cyan light, your Spark Core
has connected to the Cloud and is ready to go!
If your LED flashes red or you encounter any other problems,
visit https://www.spark.io/support to debug.
Spark <3 you!
Done! Your core should now restart.
Please wait until your core is breathing cyan and then press ENTER
but it continues to flash Green.
Is it possible for one of you folks to do a Google Hangout with me ? I can share and show you what's going on.
Hi there, @Anool_WyoLum - I donāt think we can make a hangout happen, but one of our engineers will be in touch shortly to discuss options and do some additional troubleshooting. Hang in there!!
UPDATE :
The Spark Core works on my WiFi network at home.
I now need to figure out the difference in the WiFi settings between home and office.
The only obvious one I found was
802.11ng at home and 802.11b/g at work
Ch 1 at home and Ch 6 at work
Often work wifi networks will have in place strict MAC address filtering, or blocking of some outgoing TCP ports, your IT dept should be able to help get those working for your Core. If theyāre using certificate based enterprise wifi encryption then thatās something the CC3000 canāt support as is.
I just received my spark core with built in wifi chip.
No matter what I did I could not get it to connect to various wifi networks. I tried with and without passwords, changing channels, resets etc. and following all advice and support I could find on the forum etc.
I decided to run the patch cc3000 and put the thing in DFU mode. I did this unsing Ubuntu and after downloading all the various tools etc.
I ran the patch, and it started flashing purple. I waited, and waited and waited. Nothing told me anywhere how long I was supposed to wait. After about half an hour I decided it wasnāt patching and reset the device. I got a white pulse.
Iāve since tried reflashing with the core firmware eg:-
Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
Opening DFU capable USB deviceā¦
ID 1d50:607f
Run-time device DFU version 011a
Claiming USB DFU Interfaceā¦
Setting Alternate Setting #0 ā¦
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 1024
DfuSe interface name: "Internal FlashĀ "
Downloading to address = 0x08005000, size = 76692
DownloadĀ Ā Ā [=========================] 100%Ā Ā Ā Ā Ā Ā Ā 76800 bytes
Download done.
File downloaded successfully
Transitioning to dfuMANIFEST state
Now no matter what I do, I cannot get the thing to stop pulsing white, so Iām worried Iāve interrupted the patching and done somethin irreversable.
Iāve tried various resets and additional attempts at firmware reinstall (including this:-
dfu-util -d 1d50:607f -a 1 -s 0x00020000:leave -D core-firmware.bin
which seemed to go through happily enough without error)
I still can now only get pulsing white light or back into DFU mode.
Summary - I have been using my Spark for a few weeks and without problems.
Set it up originally with the IOS App. Connected straight away.
I needed to change my SSID as it was very similar as used by my neighbours and quite long.
Once I had made the change to the SSID (9 digits long - Alpha characters and numbers only)
I tried to connect again and all I could get was Green blinking.
Setup:
Computer iMac OS X 10.9.2
iPhone 5S
Modem - Virgin Media SuperHub
Router - Apple Extreme ~ 4 years old.
Channel set to 7
Security WPA / WPA2 Personal (Have change to Unsecured as well)
Mode 802.11a - 802.11b/g
Based in the UK.
Spark powered by USB port and separate power supply.
Started on my quest - using the Troubleshooting guide
Still could not use my IOS App to connect - Tried moving my setup inches away from my router as well.
Setup spark to be Blue Blinking.
Entered credentials
Spark entered solid Blue for a few seconds -> Blinking green
Left until IOS App timed out.
Tried setting up using USB
Still no Joy with spark setup wifi
Setup spark to be Blue Blinking.
Run spark setup wifi from terminal
Entered credentials
Got response from terminal -> Serial said: Awesome. Now we'll connect!
Spark entered solid Blue for a few seconds -> Blinking green
Tried the CC3000 Patch
Results:
XXXXXXX-iMac:~ stubbsjuk$ cd /Users/stubbsjuk/Downloads/cc3000-patch-programmer-master/build
XXXXXXX-iMac:build stubbsjuk$ dfu-util -d 1d50:607f -a 0 -s 0x08005000:leave -D cc3000-patch-programmer.bin
dfu-util 0.7
Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
Filter on vendor = 0x1d50 product = 0x607f
Opening DFU capable USB device... ID 1d50:607f
Run-time device DFU version 011a
Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/20001Ka,108001Kg"
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 1024
No valid DFU suffix signature
Warning: File has no DFU suffix
DfuSe interface name: "Internal Flash "
Downloading to address = 0x08005000, size = 25572
.........................
File downloaded successfully
Transitioning to dfuMANIFEST state
Error during download get_status
Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/20001Ka,108001Kg"
Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=1, name="@SPI Flash : SST25x/0x00000000/512*04Kg"
Found Runtime: [05ac:8215] devnum=0, cfg=1, intf=3, alt=0, name="UNDEFINED"
I Did see the Solid Magenta and then Blinking Magenta
Setup spark to be Blue Blinking.
Tried again using the CLI to connect same as before.
Reading through more posts - I got he impression that their could be a more up to date patch
Results:
XXXXXX-iMac:build stubbsjuk$ cd /Users/stubbsjuk/Downloads/cc3000-patch-programmer-master/build
XXXXXXXtubbss-iMac:build stubbsjuk$ dfu-util -d 1d50:607f -a 0 -s 0x08005000:leave -D cc3000-patch-programmer.bin
dfu-util 0.7
Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
Filter on vendor = 0x1d50 product = 0x607f
Opening DFU capable USB device... ID 1d50:607f
Run-time device DFU version 011a
Found DFU: [1d50:607f] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash /0x08000000/20001Ka,108001Kg"
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 1024
No valid DFU suffix signature
Warning: File has no DFU suffix
DfuSe interface name: "Internal Flash "
Downloading to address = 0x08005000, size = 26084
..........................
File downloaded successfully
Transitioning to dfuMANIFEST state
Error during download get_status
Noticed that the size was different - so I assume that it was a different patch.
This time I did not have to push the mode key for 1 sec - It appeared to install and then went to Blinking Magenta.
I think it then went to Blinking Green.
I have run out of ideas and would really appreciate any assistance.
Set up Hotspot on my iPhone - Checked it was working by connecting my macbook.
You can actually see something connecting to the hotspot from within the iphone.
I tried using Spark setup wifi from my mac terminal also tried Coolterm.
No joy. I did notice that when I connect to one of the terminals above the light goes out - when I finished entering my credentials it then changes to solid blue, but then goes back to flashing green.
Canāt see it connecting through my iPhone either.
Triple checked the credentials.
tried both security options in the terminal WPA=2 & WPA2=3
team at 
they have a 5GHz mode and maybe your router has it too which explains the issue.