After attempting to flash BenF firmware to a number of DSO nano’s, they now just power on to the DFU screen, even without pressing the down key which is normally required to launch the updater. I have tried to go back to the ‘Official version’ and that too fails. It appears that the DFU is doing everything as expected i.e “.RDY” files, but on a power cycle the device goes back to the DFU.
I managed to recover my device using a TTL-UART interface.
I did try this in the past but never managed to get a connection to the device.
The problem was that I was routing the cables like so
RX → RX
TX → TX
GND → GND
By chance, in minidso.com I found a manual which explained how to flash the bootloader and i noticed that they mentioned to connect like so: RX → TX TX → RX
GND → GND
And that was it!
After successfully connected to the DSO Nano v3, I used Flash Loader Demo to perform the following steps in order:
I tried this process, although the process works I am still an stuck in a loop with the DSO just booting to the DFU every time.
What version of hardware do you have?