Thingy flashing Red Color. Firmware not starting.

[gabi]

Got one new Thingy52 and worked all nice with both Android and iOS teminals.

Then I have tried to upload new firmware using the iOS. Loading new firmware progress was done at about 2.7KB and when completed the Thingy start flashing Red color regularly at 1 sec interval and with PWM like.

I have tried to Power it Off then while have the Button pressed to make device On. This changes the color into flashing Green and I can find the device if scanned for as a ThingyDfu. I have tried to repeat the firmware update :

• again it gets completed and the Thingy goes back to that Red flashing color mode.

Is there any way I can restore the firmware, please ?

Regards, Gabi.

[MartinBL]

Hi,

1. Can you confirm that you tried to upgrade from 1.0.0 FW to 1.1.0 FW?
2. What HW version do you have? 1.0.0?

[gabi]

Hi Martin

1. It was upgraded to 1.1.0 when I bought it last month, and then I have tried to upgrade it to a newer version if possible. Was presented to select the device: found ThingyDfu and then I have just clicked the Start button. All this on iOS 10.3.3.

2. Hardware stamp: PCA20020 1.0.0 2017.20 C8:B1:C7 99:F8:17

[gabi]

After several tries to flash OTA and without experience I thought I should go flash it by using the SWD pins available on board.

So I have soldered 4 male/male 10cm wires to: TP19 - SWDIO TP20 - SWCLK P1.+ VREG P1.- GND

Then :

• attached to the Segger J-link Plus,
• started the nRFGo-Studio
• in Device Manager double clicked the nRF5x Programming
• nRFgo Studio asked if I want to recover the nRF52
• clicked Yes, then presented with an interface to select the File to program.
• I have selected the previously downloaded the pre-compiled hex from Nordicsemi site
• I have selected to program application and then clicked Program.

my Thingy52 re-stared now blinking the blue color and its operational again.

Gabi.