Hi Carlos
Why would you need such a thing when you have a CS3 when you need only a wifi router or Internet/TV box (that you probably already have)?

Here is the way to use the CS3 / CS3 with a smart phone:
- connect the CS3 / CS3+ to your Box / Router using a CAT5 or CAT6 cable (Ethernet cable)
- look on your CS3 the IP address given to it by the rouer / Box
- if no IP address is shown, type the IP address 192.168.1.15 and validate in the CS3
- on your smartphone, authorize WiFi and be sure you are onnected to your home WiFi
- on your smartphone open the browser and in the name filed type the same IP address ( 192.168.1.15 in this example) and confirm

I use an old iPhone 12 and the result is like this




So sorry it does not anwer your question but provides a way to use your smartphone free of charge

Cheers
Jean

You can buy a router for around $30.00 and it works even better with a pad. I use it to control locos and our 17' X 34' club layout. The stop button is better than yelling at the CS3 operator who is off in dreamland or talking with someone.