Please add support for Sonoff Zigbee 3.0 USB Dongle Plus V2

[ZeroChaos-]

When I plug in my device I see this in dmesg

New USB device found, idVendor=1a86, idProduct=55d4, bcdDevice= 4.42
New USB device strings: Mfr=1, Product=2, SerialNumber=3
Product: SONOFF Zigbee 3.0 USB Dongle Plus V2
Manufacturer: ITEAD
ttyACM0: USB ACM device

Unfortunately trying to flash it simply fails

zero@naga /tmp % sudo cc2538-bsl.py -p /dev/ttyACM0 --bootloader-sonoff-usb -ewv /usr/share/Sniffle/sniffle_cc1352p1_cc2652p1_1M.hex
sonoff
Opening port /dev/ttyACM0, baud 500000
Reading data from /usr/share/Sniffle/sniffle_cc1352p1_cc2652p1_1M.hex
Firmware file: Intel Hex
Connecting to target...
ERROR: Timeout waiting for ACK/NACK after 'Synch (0x55 0x55)'

I ordered this hardware from Ameridroid in April 2023 if that helps. I've literally never used it until trying to flash it with your Sniffle firmware :-)

[ZeroChaos-]

I am using this fork of cc2538-bsl.py if it helps to know that https://github.com/sultanqasim/cc2538-bsl

[sultanqasim]

Hmm, the error when flashing means it's failing to enter the bootloader. Is your dongle CC2652P based or EFR32 based? I read that the "V2" dongle is the EFR32-based ZBDongle-E, whereas Sniffle needs the CC2652P based ZBDongle-P.

[ZeroChaos-]

I opened this before I realized it was a fully different chipset. The v2 is the -E which is EFR32. If that chip isn't close enough to consider porting then please feel free to close this.

[sultanqasim]

Unfortunately the radio hardware in that chip is completely different, so it’s not compatible.