Upgrade keeps failing

[jnc]

Hi,
I ordered 2 LoPy with expansion board. While I could successfully upgrade one of the boards to 1.1.0b1, the upgrade of the other keeps failing. I swapped the expansion board, but the problem still remains. I get the following error:

Exception: Failed to connect to ESP32: Timed out waiting for packet header, on line 121

It is currently on 0.9.0b and can't be upgraded. Can you please advise?
Thanks

[Oneillsite]

@jnc That's a first good point...

[jnc]

@Oneillsite
Hi again, after performing as you suggest and relaunching the upgrade procedure, it did work. Thanks a lot

[jnc]

@Oneillsite here's what I get:

Welcome to minicom 2.7

OPTIONS: I18n 
Compiled on Feb  7 2016, 13:37:27.
Port /dev/ttyUSB0, 13:19:54

Press CTRL-A Z for help on special keys

dhcp server start:(ip: 192.168.4.1, mask: 255.255.255.0, gw: 192.168.4.1)
MicroPython 8785822 on 2016-10-06; LoPy with ESP32
Type "help()" for more information.
>>> ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x3 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download

[Oneillsite]

Can you perfomr this sequence ?

minicom -b 115200 -D /dev/ttyUSB0
put the jumper cable between GND and the pin marked as G23
press reset on the lopy

[jnc]

@Oneillsite I only have a linux box. I own 5 LoPy in total, and could update 4 of them. Only one in my last order fails.

[jnc]

I tried several cables and did uncheck the 'fast connection' tickbox.

[Oneillsite]

Can you do an upgrade from PC/Win10 ?

[livius]

same cable?
and did you tried uncheck "fast connection" in updater?