Skip to main content
For pairing instructions, see Radio Hardware.

​
Keyboard and HID input

iOS and Android. OS-paired keyboard controls provide physical key-down/key-up events through GCKeyboard on iOS and hardware key events on Android. A media play/pause toggle is not a held PTT button.

​
AINA A.18 BLE

iOS and Android. AINA A.18 specification, for Voice Responder firmware FW2251A1 or later.

​
Jabra / BlueParrott BLE

iOS and Android. BlueParrott BLE specification.

​
PTT-Z BLE

iOS and Android. PTT-Z01 protocol reference. Advertised name starts with PTT; service FFE0, notify characteristic FFE1. One byte: 01 press, 00 release. The first release arms input.

​
Blu-PTT BLE

iOS and Android. Blu-PTT implementation reference and ProPTT2 control reference. Named Blu-PTT devices can also be discovered without an advertised service UUID. Connection verifies the notification interface. The first release arms input.

​
Android BlueParrott Classic

Android. BlueParrott Classic specification. Uses +ANDROID vendor commands with qualifier BP, app name Sonoran Radio, key sdk, and mode 2. Matching state confirmation enables PTT,P press and PTT,R release events from the selected headset.

​
Android phone-button broadcasts

Android. Zello OEM specification. The mapper must broadcast implicitly or target com.sonoranradio. The receiver runs while the adapter is selected and the app is in the foreground.

​
iOS MFi PTT SDK

iOS. MFi PTT SDK v1.1, using ExternalAccessory protocol com.pttsdk.ea.protocol. Packets contain start byte 3C, type, big-endian command and payload length, optional payload, then end byte 3E. Zero-payload Notify type 02 commands 1001 and 1005 represent press and release. The first release arms input.

​
Android Bluetooth SPP

Android. Zello serial specification. Paired device name contains case-sensitive PTT; SPP UUID 00001101-0000-1000-8000-00805F9B34FB.
The first release arms input.

​
Android USB-C CDC

Android. Zello USB-C specification. A CDC-DATA interface with one bulk-IN endpoint carries two-byte messages: key code, then state. Odd states mean pressed; even states mean released. Primary PTT is 0x46; secondary PTT is 0x66. Audio uses its separate interface.