12/31/2023 0 Comments Using arduino pro mini![]() ![]() ![]() I will be using here a popular device based on CH341A, the black MiniProgrammer, to program an Arduino Pro Mini compatible board. However, by setting a jumper, it works as an usual USB to serial adapter. The power pins on the CH340 USB breakout board are used with jumpers to select voltage levels (3.3V or 5V).ĬH341A is a complex interface chip which adds parallel, I2C or SPI interface. It can be found at the core of the cheapest USB serial adapters, but these dongles are difficult to connect to Arduino because there is no power pin and no exposed DTR pin. It requires serial data pins RxD and TxD and also DTR, which is connected to reset pin.ĬH340 is another USB serial interface. ATmega MCU doesn't need all serial port pins. There are many choices here, and the Arduino Pro Mini has a pinheader port that matches the pinout of FTDI USB serial breakout boards. To program it, you need an USB to serial TTL converter. Unlike other members of the Arduino family, this board does not have an USB port for PC connection. ![]() If you are uploading code to a new Arduino pro mini then I will suggest you, chose the first method because the second method may not works sometimes for the wrong timing of the reset button press.How to connect and program Arduino Pro Mini boards using the CH341A MiniProgrammer.Īrduino Pro Mini is a development board based on ATmega168 or ATmega328 microcontroller. Follow the connections as shown in the diagram. When code is uploading just press the reset button of Arduino pro mini. First solder the header pins to your Pro mini and connect it on bread board. Here is the main thing which we have to do for this second method Pro mini Vcc to Arduino Uno 3.3v ( If you are using an Arduino pro mini 5-volt module then connect vcc to uno 5volt)Ĭonnection of without removing the microcontroller from Arduino UnoĪll software setup will be the same as the previous method.Second method without removing the microcontroller from Arduino Uno Connection :Īll connections are the same as the previous method just connect Arduino reset pin to GND & remove the wire from the DTR pin of pro mini Now go to tools – port & select your com port where Arduino Uno is connected. You have to choose which is you are using ) Now go to Tools – chose processor ( in my case it is Atmega 328p 3.3v 8mhz. Go to – tools – Board – select board Arduino pro mini Now connect the Arduino Uno to pc & open Arduino IDE software ![]() Pro mini DTR pin to Arduino Uno Reset pinĬonnection diagram of programming Arduino pro mini.Pro mini Vcc to Arduino Uno 3.3v ( If you are using an Arduino pro mini 5 volt module then connect vcc to uno 5volt).Connect Arduino pro mini GND to Arduino Uno GND.Remove the microcontroller Ic from Arduino Uno.Ĭonnect Arduino pro mini to Arduino Uno as described below. Arduino pro mini 3.3 volt or 5 volt ( I am using 3.3v board for demonstration ).Programming by remove microcontroller of Arduino Uno You need : Here are two methods by removing the Arduino Uno board’s microcontroller & without removing microcontroller. Today I am going to describe in this article, If in case you have not FTDI programmer then you can program the pro mini using Arduino UNO board. Arduino pro mini has not any onboard programmer chip so we use FTDI programmer to program it. we use it for more space-saving, small & lightweight project. Arduino pro mini which is smaller than Arduino nano board. ![]()
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