Zero UAV gemini dual imu: firmware upgrade is for M only?

[robyr1]

I updated the firmware on Master imu, and if i try to update the Slave i'm unable because when i power on the fc don't update it automatically like i do it for the Master...any suggest?
my seller says wich is normal, the slave don't need to be upgraded

 

[MikeLong]

Had a case with this awhile back and appeared to come down to the model of AP that we had (we've been using Zero stuff since the YS-X4P etc) tried to find the exact conversation but think it might have been on Skype rather than email

Zero had a model change in the Gemini at some point and it appears the way to know what one you've got is by the sticker on the top. Think the old version had a sticker with a space type background and the new one is just plain black, been awhile since I've dealt with the older model as its in a machine that just keeps trucking along

Old design Gemini's only required the Master unit to be upgraded (of which we had a few) but the new stickers you can upgrade both (or at least that's what we've been doing with all our units for the past few months