I have an error when i upload to a Sonoff Basic

Using Arduino IDE 1.x
1

Hello, I have a problem uploading my program to a sonoff basic.
I don't have a Usb TTL adapter so I use a Uno card with a wire between the rst and the gnd. and I plug my sonoff on 3.3V TX RX and GND and in the Arduino IDE I put a generic ESP 8266 card and when connecting the arduino card I press the sonoff button to put it in FlashMode .
But I have an error that says "the selected serial port_ does not exist or your board is not connected. I have however installed the driver CP210x. Does anyone know what I missed. Thank you very much

PS: If a moderator passes by there: I think to put wrong topic to ask my question but I do not know where to put it. If he can move it to the right place. Thank you so much

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2

Make sure you have selected the port of your Arduino board from the Tools > Port menu.

Sometimes the port will be labeled with the board name in the menu. Other times it will not. If you don’t know which port is your Arduino board, you can find it like this:

  • Unplug your Arduino board from the computer.
  • Tools > Port
  • Note the ports, if any, listed in the menu.
  • Close the Tools menu. The ports list is only updated when the Tools menu is re-opened, so this step is essential.
  • Plug your Arduino board into the computer.
  • Tools > Port - The new port listed in the menu is your Arduino board.
3

Thank you, but it's not a probleme with the port. I have only 1 port the aduino list and when i unplug the arduino the port disappears. So i have the good port