I can't help but I'm wondering why you'd need two?

I wonder that as well.

I have 2 BS3 units in my house and I'm connecting one ML gateway to each of them throughout my local area network.

Do you have 2 seperate masterlink setups in your house? 🙂

It's the only reason I can think off, your dealer sold you 2 ML gateways...

According tho the specs, the iPhone App should recognise the 2 MLGW and "merge" the 2 sets of actions into one interface.

Very little of us have a MLGW on this forum, so do not get offended if you do not get many answers.

Sebastien wrote:

I have 2 BS3 units in my house and I'm connecting one ML gateway to each of them throughout my local area network.

I guess, the dealer told you that you need two MLGW for a stereo setup ???👍

Sorry, but I have no idea why to buy two MLGW. It should be possible to connect both BS3 via masterlink and add one MLGW, that can be conrolled from both setups...(!?)

Stefan

Yeah. No reason at all for a second MLGW there. Put one BS3 in V.OPT 6.

The only reason to have to MLGW's on one network is if you're using a single room lighting solution (ie. Lutron Grafik Eye's not linked together).  Other than that (especially once the ability to have multiple users was added) there's really no reason for more than one MLGW.  Unless of course you don't have a way to run ML between the two systems and you need to be able to use the iOS app...

Also, in case you actually want the answer to your question, the login credentials for both gateways needs to be different and you'll need to manually switch back and forth between the two in the Settings menu of the iPhone app.  You cannot just duplicate the same config for both gateways.  Not convenient at all and in most cases not necessary.