Module update to 4.0.0.2 fails

[KiwiBryn]

Hi,

I have two devices purchased from mouser in the last couple of weeks.

When I initially fired them up AT+VER returned

1.0.1,2.9
OK

I then setup my ST-Link v2 & FTDI

I then backed them up and two files were created in the bin directory

303634327C376902.bak
343834335F368F09.bak

I then wanted to update the devices two the most recent software (4.0.0.2) but it failed

or

When I now query the devices with AT+VER I get

ERROR_INVALID_MODULE

How to I recover from this?

Thanks

@KiwiBryn

[KiwiBryn]

I had a look at the recovery document WM-SG-SM-42 recover guide.pdf when I try and STM-Link I get this error

I'm currently stuck and have burnt a bit of time trying to get this to work.

@KiwiBryn

[KiwiBryn]

Any assistance would be greatly appreciated...

[KiwiBryn]

It's been more than two months with no reply, any assistance would be greatly appreciated...