@Lasar I finally found a solution that worked for me buried in YouTube comments. The user noted that a solid red light after failure to connect was indicative of a firmware issue, and sure enough following their instructions to reset the firmware the module was able to connect and then re-updated its firmware. To do this reset, unplug the power supply for your module and wait 30 seconds, then hold in the reset button and plug the power back in while continuing to hold the reset button. Wait until the module displays a blinking red light (mine blinked 3 times) and release the reset button. Wait about a minute, and the module should show the solid green flashing blue pattern to indicate it's ready for setup. Follow the normal instructions to change to module WiFi in the Blink app to finish. Hope this helps you as I spent way more time than I ever expected searching for this.  

  @mticktin thank you so much!  That worked perfectly. I tried for hours to get Blink connected to the Deco network.  I still can't get my garage door opener connected and my Alexa dot.  I appreciate your post very much!!

  @mticktin 

This was a huge find!  Finally got my Sync connected to the IoT network after multiple failed attempts.

Thank you!

  @mticktin 

big props to you in this solution... I fought way too long before I found this comment. Thank you.

  @mticktin Wow! Thanks SO MUCH for this. Saved me a major headache! Really appreciate you taking the time to tell us after you had already sold your problem. That was kind and so helpful!

  @mticktin thanks so much for this. I've tried repeatedly, I feel like I did everything except unplug, press reset, and plug back in while pressing reset. In that exact order at least. Last night I was ready to return the wifi extender and find a different one. After taking a break last night and finding this post today, I'm finally back in business! Now my cameras have a strong signal to the wi-fi

  @mticktin Halelujah!!

thank you so much. After trying and trying and following the 'normal' advice (Blink always seems to think the problem is with the password, the wifi, the router, your broadband, maybe sharks have attached the undersea cables..) it was the firmware as you most excellently pointed out. Thank you.

  @Lasar If your Blink Sync module isn’t connecting to your Deco XE5300, the issue may be due to compatibility with the 2.4 GHz band, as Blink devices typically only support this band. Ensure your Deco broadcasts the 2.4 GHz band separately; sometimes, merging both 2.4 and 5 GHz under one SSID can cause connectivity issues. If you’ve already tried connecting through the IoT network, attempt setting up a guest network, which often has fewer security restrictions that can interfere with device connectivity. Finally, reboot both your Deco and Blink module after these adjustments to refresh the network settings.

  @mticktin you're a hero! Thanks alot - this solution worked first time for me. It connected fine and then began updating firmware within the Blink App 

mticktin wrote

  @Lasar I finally found a solution that worked for me buried in YouTube comments. The user noted that a solid red light after failure to connect was indicative of a firmware issue, and sure enough following their instructions to reset the firmware the module was able to connect and then re-updated its firmware. To do this reset, unplug the power supply for your module and wait 30 seconds, then hold in the reset button and plug the power back in while continuing to hold the reset button. Wait until the module displays a blinking red light (mine blinked 3 times) and release the reset button. Wait about a minute, and the module should show the solid green flashing blue pattern to indicate it's ready for setup. Follow the normal instructions to change to module WiFi in the Blink app to finish. Hope this helps you as I spent way more time than I ever expected searching for this.