Crestron Mobile Pro (iOS) and CP3

First of all: This is not about the Crestron App, Crestron Go, or Smart Graphics. I'm referring exclusively to the old Crestron Mobile Pro app with the purple icon.

Has anyone successfully used the old Crestron Mobile Pro with a CP3? According to Crestron's (rather old) documentation, this combination should work.

Unfortunately, I can't establish any connection to the CP3. The app simply loops through:

Connecting → Reconnecting → Connecting

There is:

• no error message,
• no activity in the Text Console,
• no "Online" entry in the IP Table,
• no entries in the Error Log.

The CP3 requires SSL (TLS 1.2). This makes me wonder whether the old iPad 2 (iOS 9) and the legacy Mobile Pro app fully support TLS 1.2.

In theory, authentication should also be required. However, it's not clear whether this applies to a Crestron Mobile Client, since an old XPanel (EXE) connects to the same CP3 without any issues.

On the other hand, a Crestron Mobile Client can still be added in the latest version of SIMPL Windows without any warnings or compatibility messages, which makes me believe that this combination should still be supported.

My setup:

• Latest Crestron software and database
• CP3 running the latest firmware (I also tried downgrading to FW 1.6003 without success)
• iPad 2 running iOS 9
• Crestron Mobile Pro v2.00.75

The exact same project works perfectly with a Series 2 processor.

For troubleshooting, I reduced the test project in both SIMPL Windows and VT Pro-e to a single button, so the project itself is about as simple as it can be.

Has anyone managed to get this working with a CP3, or can anyone confirm whether the old Mobile Pro app is still compatible with current CP3 firmware?