@Rob-Verhoeff said in communication system:
On AliExpress, you can buy a Bluetooth button that can serve as a push-to-talk key. Press the button, and you're ready to transmit.
I have bought two of these:
https://nl.aliexpress.com/item/1005005481658422.html
(common CR2032 batteries not included)
They seem to work fine. You can even use multiple buttons for multiple groups.
Button A to talk only to the front driver
Button B to talk to the whole group
Button C to talk to the homefront
Of course for Zello every participating phone needs to have an internet connection, but you can use multiple phones on one hotspot