At present, it is found that Arduino version 1.8.5 or more needs to be set up when downloading programs.

Next, take Arduino 1.8.5/Arduino 1.8.8/arduino 1.8.9 and Arduino 1.8.9 as examples.

The development board connects the computer through the USB cable and checks the port number in the device manager. As shown in the figure.

I. Take Arduino 1.8.5 as an example

Open the Arduino software and set up the tools, as shown in the figure.

2. Take Arduino 1.8.8 as an example

Open the Arduino software and set up the tools, as shown in the figure.

Note 1: The manufactured firmware versions of Arduino NANO are different, and the options for processors are different. One is ATmega 328P, the other is ATmega 328P (Old Bootloader), pay attention to the distinction.

Note 2: Arduino NANO manufactured firmware version is updated with Arduino IDE, Arduino IDE updates faster, there is Arduino NANO manufacturer did not follow up updates in time, or the old version inventory, so there will be more than 1.85 version of the latest firmware default, not compatible with the earlier version, it is necessary to choose manually.

3. the tool set OK, the next step is the same, select the example. Let's take Arduino version 1.8.5 as an example, as shown in the figure.

4. Ready, click Upload, as shown in the figure

The upload was successful and the test was over.