The Tx led is always on

Projects Programming
1

Please excuse me. Hi, I am new to programming with arduino, but I have a problem with my arduino, which is that the transmitter light on pin 13 is always transmitting or on, which does not allow me to upload any new program, and I don't know if it is a hardware problem or Software. Please someone help me because I need an arduino

2

Hello, Can you explain better please?

3

the led on pin 13 is not the sae as the Tx Led, at least not on a UNO if this is what you are referring to

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4

Oh okay so you have to upload a new program with anything to erase the othere one.

5

Try this...

  • prepare to upload a new sketch
  • press and release the RESET button
  • upload the new sketch immediately
6

Steps to Recover Your Arduino Board from Serial Flood:

  1. Power Off the Board: Completely turn off your Arduino board by removing the power source.
  2. Disconnect the USB Cable: Unplug the USB cable from the board.
  3. Hold the Reset Button: Press and hold down the Reset button on the board.
  • Alternatively, you can run a jumper wire from the RESET pin to the GND pin.
  1. Reconnect the USB Cable: While still holding the Reset button, reconnect the USB cable to the board.
  2. Start Uploading a New Sketch: Begin uploading a sketch that does not produce the same problem (e.g., the Blink sketch).
  3. Release the Reset Button: When you see the Receive light blink, release the Reset button.
  4. Modify Your Code: To prevent the issue from recurring, add a delay(3000); or a longer delay in the setup() function of your sketch. This delay allows you to recover easily from a serial flood.

Note: This problem often occurs when the serial output is flooded, indicated by the TX light being stuck on.

7

@jfsc - You did not read the original question.

8

If it is indeed the Tx LED, the serial-to-usb converter is malfunctioning.

If it's the L LED, the behaviour can be normal and does not have a direct relation with your problem. I have an original Mega where that L LED is always on (unless I program it in the sketch to be off); I have a SparkFun Redboard where that does not happen. So you need to find the schematic of your exact board (good luck if it's a clone) or measure with a ohm meter and check how that L LED is connected to the main processor.

9

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