With the display connected the upload would fail. In doing so I would not have to disconnect the RX and TX pins while uploading a new sketch.
Code samples in the reference are released into the public domain.Maybe someone has encountered this before, i did search online but did not find any similar cases.įor my weather station with a Nextion display I wanted the display to be connected to a different serial port than the default port. The text of the Arduino reference is licensed under aĬreative Commons Attribution-ShareAlike 3.0 License. Typically used to add a reset button to shields which block the one on the board.Ĭorrections, suggestions, and new documentation should be posted to the Forum. (Diecimila-only) Bring this line LOW to reset the microcontroller. (Diecimila-only) A 3.3 volt supply generated by the on-board FTDI chip. This can come either from VIN via an on-board regulator, or be supplied by USB or another regulated 5V supply. The regulated power supply used to power the microcontroller and other components on the board. Also note that the LilyPad has no VIN pin and accepts only a regulated input. Note that different boards accept different input voltages ranges, please see the documentation for your board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). Support I 2C (TWI) communication using the Wire library (documentation on the Wiring website). Analog inputs 6 and 7 (present on the Mini and BT) cannot be used as digital pins. Most of the analog inputs can also be used as digital pins: analog input 0 as digital pin 14 through analog input 5 as digital pin 19. In addition to the specific functions listed below, the analog input pins support 10-bit analog-to-digital conversion (ADC) using the analogRead() function. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. On the Diecimila and LilyPad, there is a built-in LED connected to digital pin 13. These pins support SPI communication, which, although provided by the underlying hardware, is not currently included in the Arduino language.
(Arduino BT-only) Connected to the reset line of the bluetooth module. On boards with an ATmega8, PWM output is available only on pins 9, 10, and 11. Provide 8-bit PWM output with the analogWrite() function. See the attachInterrupt() function for details. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. On the Arduino Mini and LilyPad Arduino, they are intended for use with an external TTL serial module (e.g. On the Arduino BT, they are connected to the corresponding pins of the WT11 Bluetooth module. On the Arduino Diecimila, these pins are connected to the corresponding pins of the FTDI USB-to-TTL Serial chip. Used to receive (RX) and transmit (TX) TTL serial data. Each pin has an internal pull-up resistor which can be turned on and off using digitalWrite() (w/ a value of HIGH or LOW, respectively) when the pin is configured as an input. In addition to the specific functions listed below, the digital pins on an Arduino board can be used for general purpose input and output via the pinMode(), digitalRead(), and digitalWrite() commands.
Power and Ground Pins (power: orange, grounds: light orange).In-circuit Serial Programmer (blue-green).Digital Pins 0-1/Serial In/Out - TX/RX (dark green) - These pins cannot be used for digital i/o ( digitalRead and digitalWrite) if you are also using serial communication (e.g.