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PTT on Portsdown 4
Posted: Sun Aug 21, 2022 5:48 pm
by g3yjr
I want to use a sequencer to ask PD4 to go to Tx and the same for Langstone.
I can see from
https://wiki.batc.org.uk/Portsdown_4_GPIO_Connections that pin 11 is Langstone PTT Demand In. Is it the same pin for Portsdown 4?
Graham
Re: PTT on Portsdown 4
Posted: Sun Aug 21, 2022 6:57 pm
by G8GKQ
Hi Graham
The Portsdown 4 is not designed to be used with a touchscreen and PTT demand. For repeater use (without a touchscreen) the PTT demand is on GPIO pin 12, but this is not compatible with touchscreen operation.
Dave
Re: PTT on Portsdown 4
Posted: Sun Aug 21, 2022 9:33 pm
by g3yjr
Thanks for the info Dave, really I was looking to trigger the sequencer (maybe from my PTT pedal) and for that to get PD4 to Tx, bypassing the touchscreen soft-button entry, but displaying the red Tx "button" indication. That way PD4 is a slave to the sequencer.
But I can do foot and finger operation.
73 Graham