![]() Now we wire our Uno to our NanoV3 as shown in the picture: ![]() ![]() Now we make sure that we have selected "Arduino/Genuino Uno" as board, and set the correct COM port, and load the sketch on our microcontroller, compatible with Arduino Uno R3. In the menu "File we go to "Examples" -> "11. To do this, we connect the microcontroller to the PC, and start the ArduinoIDE. So today we show you how to make a programmer out of a microcontroller compatible with Arduino Uno R3, and how to supply a Nano with a new bootloader. There are special programmers for this, but most of them already have a suitable solution in their drawer. To reprogram the chip we need a programming device. Also this method allows to flash modules with the original bootloader up to date, so you don't have to select "old bootloader" at "processor" every time. So if the module does not work anymore it can be because the bootloader is faulty. This allows you to write programs to the module via the Arduino IDE. Microcontrollers like the NanoV3 are shipped with a bootloader already installed. Today we would like to answer a frequently asked question from our support department: how can I reflash the bootloader on the Nano?
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