echolink 用串口控制ptt怎么实现??
经过试验.
我用了一块电池.
黄线 连接 负极.
紫线 连接 正极.
可以控制ptt键, 当电接通后echolink 出现tx.
但这种方法不好...有没有其它方法.
黄线是 pin5 rst
紫线是 pin8 cts
echolink help 原文.
serial port cts: check this box, and choose the serial port to be used, if you wish to control the tx using a push-to-talk switch connected to the computer's serial port cts pin. this is typically used for connecting a footswitch or push-to-talk switch to the pc for echolink operation.
active low: inverts the sense of the cts pin, so that tx is activated when the cts pin goes low.
auto-select mic input: in sysop mode, checking this box causes echolink to automatically switch the inputs on the windows recording volume control between line-in and microphone when the cts pin is asserted, and also to mute and un-mute the microphone input on the playback volume control. this is for the convenience of hams who wish to connect a push-to-talk microphone to the pc to use as a supplement to the rf link. if using this feature, be sure that both the line-in and microphone sliders are turned up on the windows recording volume control, and the microphone slider turned out on the windows playbackvolume control. also, be sure that the rf receiver is connected to the line-in jack of your sound card, and the local microphone is connected to mic-in. this feature is not available in single-user mode.
note: in sysop mode, you can also choose to have the cts signal activate the local transmitter's ptt, in addition to transmitting over the internet. to enable this feature, see the tx control tab on sysop settings.
