bluedv radio qa

Q: Does BlueDV radio supports all kind of microphones?
A: No, only the QX-18B. Next month, I will receive another PTT microphone from another vendor to test.

Q: I am getting an error. “[ERROR] Error opening audio stream: Sample format not supported”
A: Try another USB speaker set or use the speaker from the Raspberry PI 3.

Q: My PTT is not working.
A: Make sure you ordered the QX-18B ( [LINK] )

Double check:

sudo lsusb

See Jieli Technology UACDemoV1.0

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0b0e:2476 GN Netcom Jabra Speak 710
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0403:6015 Future Technology Devices International, Ltd Bridge(I2C/SPI/UART/FIFO)
Bus 003 Device 003: ID 7273:8378 Jieli Technology UACDemoV1.0
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

You can also check the PTT key ( BlueDV must be stopped )

Install the evtest tool

sudo apt install evtest -y

Then start the test tool.

sudo evtest

Select the Jieli Technology UACDemoV1.0 Keyboard

Available devices:
/dev/input/event0:      Jabra Speak 710
/dev/input/event1:      Jabra Speak 710
/dev/input/event10:     vc4-hdmi-1 HDMI Jack
/dev/input/event2:      Jabra Speak 710 Consumer Control
/dev/input/event3:      Jieli Technology UACDemoV1.0 Consumer Control
/dev/input/event4:      Jieli Technology UACDemoV1.0 Keyboard
/dev/input/event5:      Jieli Technology UACDemoV1.0 Mouse
/dev/input/event6:      pwr_button
/dev/input/event7:      vc4-hdmi-0
/dev/input/event8:      vc4-hdmi-0 HDMI Jack
/dev/input/event9:      vc4-hdmi-1
Select the device event number [0-10]: 4

Now press the ptt (red light on the front will light) and see:

Event: time 1771763869.673322, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003b
Event: time 1771763869.673322, type 1 (EV_KEY), code 60 (KEY_F2), value 1
Event: time 1771763869.673322, -------------- SYN_REPORT ------------

Check if the device is available under Linux.

ls -als /dev/mymic

See: ( The X can any number ). When you get an error, the above tests also had issues.

0 lrwxrwxrwx 1 root root 12 Feb 19 17:45 /dev/mymic -> input/eventX

Q: What screens are supported?
A: Only the 2.8″ ST7789 and the 2.8″ ILI9341. Other screen sizes or models are not supported.

Q: Why do I need a code at installation?
A: The software is in beta and I want to know who my testers are, so I can contact them when needed. When the software is stable, the code will be removed. I not have commercial intentions.

Q: Why only XLX and not REF?
A: I am blocked (and many others) on all REF reflectors by the developer of the reflector software. I am not going to spend time on this old system.

Q: How is the XLX hosts file updated
A: The XLX hosts file is automatically downloaded when BlueDV starts. It is a dynamic file, so important to update regularly.

Q: I see also an output device for the QX-18B. Can I use this?
A: No, the QX-18B has a microphone and the speaker interface. The Physical Speaker is removed from the device. (I connected a speaker, but that was not working, I think they also removed the amp for the speaker.).

Q: The voice is very low.
A: You need an amplified speaker

Q: My USB speaker is not recognised.
A: Send me the following commands. lsusb and play -l

Q: I only have an AMBEServer and not a serial AMBE stick. ( e.g. ZUM AMBE board, Japanese AMBEServer, DVMEGA Globetrotter )
A: You have to edit the /usr/local/bluedv/config.ini file and change the following lines.

[AMBE]
SerialPort = /dev/ttyUSB0
UDPServer = 192.168.1.10
Type = net
UDPPort = 2460