PTT always stay On

App_rpt-users
1

I need help with this problem. I am using Raspberry Pi3 B+, cm108 USB FOB and asl 2 beta6.
Previously I used the node in full duplex mode (duplex 2) to control the repeater and had no problems.
But now I need a simplex node (duplex = 1) to control Baofeng 888. And when Raspberry Pi is rebooting, it constantly triggered PTT mode.
When I run Simple-USB tune, and chose option F (Toggle PTT and Tone) it runs the test, and after that PTT is no longer always stay ON and radio start work normally.

2

I would take a look see if the signal in simple usb config might be inverted - carrierfrom = usb ; no,usb,usbinvert
; no - no carrier detection at all
; usb - from the COR line on the USB sound fob (Active high)
; usbinvert - from the inverted COR line on the USB sound fob (Active low)

ctcssfrom = usb ; no,usb,usbinvert
; no - CTCSS decoding, system will be carrier squelch
; usb - CTCSS decoding using input from USB sound fob (Active high)
; usbinvert - from the inverted CTCSS line on the USB sound fob (Active low)

And also

invertptt = 0 ; Invert PTT: 0,1
; 0 - ground to transmit
; 1 - open to transmit

duplex = 0 ; Duplex 0,1
; 0 - half duplex
; 1 - full duplex

3

I found not very straightforward solution: run a script at startup: “susb key” “susb unkey”

4

carrierfrom = usb
ctcssfrom = no
invertptt = 1 (CM108 FOB without transistor)
duplex = 0