![]() ![]() This menu also shows the options for choosing the ATmega168 processor that can be found in older versions. Processor: pick ATmega328P (5V, 16MHz) or ATmega328P (3.3V 8MHz) depending on the version we have.To do this, depending on whether we are working with a 3.3V or 5V Arduino in the Tools menu within the Arduino IDE, it is necessary to select the options: Once these PINs are connected, we can connect the FTDI module to the computer via USB and send the code to the board. FTDI module connected to an Arduino Pro Mini clone during programming. In my case, I am working with a clone and the connection I made is shown in the picture bellow. If you are working with a module designed specifically for Arduino, this connection will be as easy as entering the programmer’s pins on the Pro Mini board. Moreover, in the case of some programmer modules it is not even included. GND to GND (optional): that in principle it is not necessary to connect.GND to GND ( Ground): which will act just as a ground.Depending on the configuration we have chosen, we will also have to configure the switch on the FTDI board. VCC to VCC ( Voltage Common Collector): which will power the Arduino board with 5V or 3.3V.RXD to TXD: so that the Arduino board receives the data transmitted by the programmer.TXD to RXD ( Transmit Data, Read Data): so that the serial data transmitted by the Arduino is received by the FTDI module.If so, it will delete and write the flash memory with the new program. During this process, the bootloader is loaded and checks for a few seconds whether you are trying to send code. DTR to DTR ( Data Terminal Ready) (or BLK): which just keeps the Arduino’s reset state active.This means that the pins can be connected directly or by using wires to each other: To connect the FTDI module to the Arduino, all you have to do is connect the programming pins on both boards accordingly. ![]() ![]() This chip is in charge of converting the USB signals into UART signals (RS232) which are the ones understood by the Arduino’s microcontroller. In my case I have used an FTDI module that is one of the cheapest ( $1.24 on AliExpress, $5.99 on Amazon) and integrates a FTDI FT232RL chip. There are several modules on the market that allow us to easily connect a Pro Mini board to the USB input of our computer to do its programming. Main parts of the FTDI USB to serial converter (UART) module. ![]() For this reason we will have to work with an external signal converter module to program the board. USB to serial UART boardĪt the expense of this reduction in price, power consumption and size, we will have access to a smaller number of input/output PINs and the lack of a USB port. This is mainly due to the fact that the board has a smaller number of components. ModelĬomparative table of sizes of each Arduino board.Īs you can see on the table the price of the Pro Mini is also a little lower. In both cases, apart from reducing their size, they use less energy than their big brothers (especially in the case of the 3.3V version). It is possible to find them in 3.3V with a processor at 8MHz and with 5V at 16MHz. There are currently two versions of the Pro Mini plates. Oficial Arduino Pro Mini board (by sparkfun) ![]()
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