I had my Xenon working well. I must have ported some wrong code into firmware. It has started flashing red. I am unable to download valid firmware as it never comes to normal state. I am unable to detect it on the USB port.
Please Help.
particle --version
Put Xenon in DFU mode physically
particle update -v
Seems to reset the firmare
Welcome!
The easiest way to return a Gen3 device to a know state is to the the particle update as you have done and then to flash Tinker particle flash --usb tinker - test that the device then connects to the particle app on your smartphone and you can operate Tinker. Then try your software again - if you still get issues then post your code here (or at least a sample that compiles and causes the error) and folks will be willing help resolve it.
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