GHL Connect - app version 3.34.3 - Cannot connect to Doser 2.1

[paal]

"Out of nowhere" I can no longer connect to my GHL Doser 2.1 using the GHL Connect app (version 3.34.3. android)
I noticed that the app had automatically updated less than a week ago (26. Feb 2026), so my immediate suspicion was that it was related to this somehow.

EDIT: The doser is my only GHL product, so cannot test anything else.

Anyone else having similar issues?

 

[Rocks reef]

Bumping this up and hopefully someone can help you

 

[GoonReef]

I have this same issue. Did you by any chance find a fix ?

 

[DJF]

Not sure it is the issue but have you updated the firmware lately? (GHL control center via USB)

 

[paal]

I have this same issue. Did you by any chance find a fix ?

Just tried logging in again. Still no access. (and still no newer version available for the app it seems)

I just dumped a lot of SPS from the tank, so my dosing is set to more than I need atm: I'm just unplugging the whole unit for 6-8 hours every night and that luckily just works out. (Though it IS kind of annoying, I must say :P )

Not sure it is the issue but have you updated the firmware lately? (GHL control center via USB)

To be honest I didn't even know it had a USB -interface(!) I've always just used the wifi connection and phone app.

I should be able to download a similar program to a laptop and adjust values via USB? That's awesome! :)

 

[spsick]

Set to static IP solved my problems with this exact situation.

I also updated the WiFi firmware which didn’t solve issue.

 

[DJF]

To be honest I didn't even know it had a USB -interface(!) I've always just used the wifi connection and phone app.

I should be able to download a similar program to a laptop and adjust values via USB? That's awesome! :)

just note: for dosers the usb connector is male A. you’ll likely need a usb 2.0 male A to male A connector which are harder to find these days; amazon is your friend . Get the latest GHL connect for windows from the support site.