S1 + Godox TT685 flash - exposure compensation problem

[Richardgb]

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Having read reports here and elsewhere of Godox flashes being good value for money and usable with the S1, I recently bought a TT685 with Olympus / Panasonic compatibility. (In function, the flash unit is the same as the V860ii but uses AA batteries instead of Godox's own rechargeable battery.)

However, while the normal exposure is fine, I cannot adjust the flash intensity via either the flashgun's own adjustment system or via the flash exposure compensation on the body's menu. In other words, no matter how I try to adjust the flash exposure, the images look the same. Both the camera and lens firmware is up to date.

I have put the problem to Panasonic but wonder if any users here of either the TT685 or V860ii have had similar issues, and how they were resolved.

[Ingo]

I'm using the V1o and have no problems to adjust the flash intensity via the flash or body menu. 

With the TT685 I always get underexposed photos (I use M-mode).