Furthermore, several pins have specific functions: 0 (RX) and 1 (TX) serial numbers (TX). TTL serial data is received (RX) and transmitted (TX) using this device. These pins are connected to the six-pin header’s TX-0 and RX-1 pins. 2 and 3 External Interrupts On a low value, a rising or falling edge, or a change in value, these pins can be programmed to generate an interrupt. For more information, see the attach Interrupt function. 3, 5, 6, 9, 10, and 11 are PWM. With the analog Write function, you can get an 8-bit PWM output. 10 (SS), 11 (MOSI), 12 (MISO), 13 (MISO) SPI (SCK). SPI communication is supported by these pins, although it is not yet supported by the Arduino language, despite the fact that it is given by the underlying hardware. LED number: 13 A built-in LED is connected to digital pin 13 by a wire. When the pin is HIGH, the LED is turned on; when it is LOW, the LED is turned off.
The Pro Mini has eight analog inputs, each with a resolution of ten bits (i.e. 1024 different values). Four of them are on the board’s edge headers, and two (inputs 4 and 5) are on the board’s interior holes. The analog inputs have a range of measurements from the ground to VCC. Furthermore, some pins have specialized functions: A4 (SDA) and A5 I2C (SCL). The Wire library is used to support I2C (TWI) communication. Another pin is available on the board: To reset the microcontroller, connect this line to the ground. Typically used to add a reset button to shields that block the boards.
The Arduino Pro Mini includes a number of communication ports for connecting to a computer, another Arduino, or other microcontrollers. The ATmega328P supports UART TTL serial communication via digital pins 0 (RX) and 1. (TX). The Arduino software includes a serial monitor that allows simple textual data to be sent to and from the Arduino board via USB.
Serial communication on any of the Pro Mini’s digital pins is possible with a Software Serial library. I2C (TWI) and SPI communication are also supported by the ATmega328P. The Arduino software includes a Wire library to make use of the I2C bus easier; see the reference for more information. Please refer to the ATmega328P datasheet for more information on how to use SPI communication.
The Arduino Pro Mini includes a number of communication ports for connecting to a computer, another Arduino, or other microcontrollers. The ATmega328P supports UART TTL serial communication via digital pins 0 (RX) and 1. (TX). The Arduino software includes a serial monitor that allows simple textual data to be sent to and from the Arduino board via USB.
Serial communication on any of the Pro Mini’s digital pins is possible with a Software Serial library. I2C (TWI) and SPI communication are also supported by the ATmega328P. The Arduino software includes a Wire library to make use of the I2C bus easier; see the reference for more information. Please refer to the ATmega328P datasheet for more information on how to use SPI communication.
Instead of requiring a physical press of the reset button prior to an upload, the Arduino Pro Mini is designed to be reset by software running on a connected computer. A 100 nF capacitor connects one of the six-pin header pins to the ATmega328P’s reset line. This pin connects to one of the USB-to-serial converter’s hardware flow control lines connected to the header: RTS when using an FTDI cable, DTR when using the Sparkfun breakout board. When this line is asserted (taken low), the reset line drops for a short period of time, allowing the chip to be reset. The Arduino software makes use of this capability to allow you to upload code by simply pressing the upload button in the Arduino software
This capability is used by the Arduino software to allow you to upload code by simply pressing the upload button in the Arduino environment. Because the lowering of the reset line can be well-coordinated with the start of the upload, the bootloader can have a shorter timeout. This configuration has additional implications. When the Pro Mini is connected to a computer running Mac OS X or Linux, it resets each time a software connection is made to it (via USB). The bootloader is active on the Pro for the next half-second or so.
While it is programmed to ignore malformed data (that is, anything other than a new code upload), it will intercept the first few bytes of data sent to the board after a connection is established. If a sketch on the board receives a one-time configuration or other data when it first starts, ensures that the software with which it communicates waits for a second after opening the connection before sending this data.