Can I use two bluetooth devices from a tablet?

I am making a museum installation which uses a Mega and an Android tablet which will run a MIT app inventor program. I want to use a Bluetooth keyboard on the the tablet at the same time talking to the Arduino Mega via Bluetooth. The Bluetooth is built in the tablet while the Mega will use an HC-05 module.

How do I know if the tablet can serve both the Mega and the keyboard?

Search for your specific Android tablet model specifications.

The specs for SAMSUNG Galaxy TabActive4 Pro say Bluetooth

BT v5.2 BLE. That's it. Still doesn't answer if I can use two Bluetooth devices though I think I need to switch to a HM-11 for BLE.

Yes, it does. If, however, you do not want to learn about what you have, that is not my problem.

The obvious approach is to try pairing/connecting to both devices at once, and if successful, use each one with a separate app.

A bit of a conundrum: I'd rather have a good idea before purchasing the tablet and accessories. The finances are set up so it's hard to return stuff. Does any one have this setup? Also found out that the tablet is BLE, not standard Bluetooth.

Also found out that the tablet is BLE, not standard Bluetooth.

That's a problem, I would look for something else then the HC-05. Is it important that it is an Arduino Mega? Because if it isn't, you can use the Arduino nano ESP32 or most other ESP32 devices. You need to make sure that all the used libraries are ESP32 compatible if you use it.

Is expecting answers from random user accounts (not all are human) on a random web site is how you make decisions? Where will you go when it does not work out-of-box? Some baker's plumber in the next town?

I've already saved you from yourself. You're welcome.

In that case, hire a qualified professional to do the work.

Hmmm.

Wow, I've never encountered such anger from this forum. I am trying to learn something by asking a simple question. And I will make a decision if the answer seems plausible (even test it!).

Saying you should be the person learning about your equipment is "anger?" It helped you learn that you have something you did not know you had... and you bark back? Wow, indeed.

Get a life.

First, by reading reply #2, secondly, in the unlikely event that the tablet can be persuaded to support two channels, by writing the terminal app that uses that facility....
This is not an Arduino problem.

Since you seem to have a Mega in your hand, you might note that it has four serial ports and can thus support multiple Bluetooth channels by the simple expedient of connecting multiple Blueteeth thereto, one of which connects to your single-channel tablet (via your HC-05).
That IS an Arduino problem - one that I believe has been solved, but it is down to you to determine that it serves your purpose.

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