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Topic: Disconnecting Arduino from the USB and trying to communicate over TX/RX (Read 177 times) previous topic - next topic

nonomus

I am trying to have the arduino continuously send serial data over TX/RX pins. Once I upload my program onto Arduino using the USB, then unplug the USB, will Arduino automatically start transmitting the serial data over its TX/RX pins (assuming its supplied extermal power)?

Thanks.

Caltoa

Do you have the Arduino Uno board ?
The RX (pin 0) and TX (pin 1) are always connected to the usb-serial.
If you connect something else to pin 0 and pin 1, the signals of the usb-serial are overriden, but they are still connected. That is regardless if the Arduino board is powered with the usb plug or not. So you can keep on using the usb to power the Arduino.

zoomkat


I am trying to have the arduino continuously send serial data over TX/RX pins. Once I upload my program onto Arduino using the USB, then unplug the USB, will Arduino automatically start transmitting the serial data over its TX/RX pins (assuming its supplied extermal power)? Thanks.


I would think it would.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

CrossRoads

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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