Can't connect one of my ten cores . forever flashing green

Hi there,

Having trouble with one of my cores. Any help is appreciated.


tinker app fails a WiFi connect: never leaves blinking green

“particle serial wifi” (w/blinking blue): never leaves blinking green

attempts at dfu-util firmware updates {with core in DFU mode) fail:

X:>dfu-util - d 2b04:d008 -a 0 -s 0x8020000 -D system-part1-0.4.7-p1.bin
dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to

Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Opening DFU capable USB device…
ID 1d50:607f
Run-time device DFU version 011a
Claiming USB DFU Interface…
Setting Alternate Setting #0
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 1024
DfuSe interface name: "Internal Flash "
Downloading to address = 0x08020000, size = 249724
Last page at 0x0805cf7b is not writeable

X:>particle flash YOUR_DEVICE_NAME system-part1-0.4.6-p1.bin
attempting to flash firmware to your device YOUR_DEVICE_NAME


There’s no system firmware for a CORE.

Try this:

  • particle flash --usb cc3000
  • particle flash --factory tinker
  • particle flash --usb tinker
  • particle serial wifi
1 Like