Hello,
I bought on ebay MMDVM_HS_Dual_Hat
http://www.hamzavody.cz/foto/mmdvm.jpg http://www.hamzavody.cz/foto/hs.jpg
I want to update the firmware by using the command
sudo pistar-mmdvmhshatflash hs_dual_hat
and I will see this result
http://www.hamzavody.cz/foto/chyba.jpg
some ideas ...