Portsdown 4 PTT not working?
Posted: Tue Nov 01, 2022 1:05 pm
I'm just putting together my 'mule' PD4 and want to include a PTT controlled closing relay contact....Just like I did on my first PD4.
But I'm getting nothing on Pin 40....
https://wiki.batc.org.uk/Portsdown_4_GPIO_Connections
Am I going mad.....its just got a 1k to a small switching transistor BC337 base which them does the harder work.
Don't think I need to 'enable' the facility., it should just go to TX. I will test later with a new RPi but from memory I have to date not used any of the GPIO since I installed it 6 months ago (was just a touch-screen in a box for Pluto and MT RX duties).
Gareth
But I'm getting nothing on Pin 40....
https://wiki.batc.org.uk/Portsdown_4_GPIO_Connections
Am I going mad.....its just got a 1k to a small switching transistor BC337 base which them does the harder work.
Don't think I need to 'enable' the facility., it should just go to TX. I will test later with a new RPi but from memory I have to date not used any of the GPIO since I installed it 6 months ago (was just a touch-screen in a box for Pluto and MT RX duties).
Gareth