KS0547 Keyestudio NANO PLUS Development Board Compatible with Arduino NANO(Black and Eco-friendly)

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The processor core of Keyestudio NANO PLUS is ATMEGA328P-AU. It is as same as the official Arduino Nano in addition to driver file and USB to serial chip (CH340C).

It also has 14 digital input / output interfaces (6 of which can be used as PWM output), 8 analog input interfaces, 1 16MHz crystal oscillator, 1 ICSP interface and a reset button. The ICSP interface is used to program the Atmega328P-Au. We can supply power with a type-CUS cable or the port VIN GND (DC 7-12V)


  • Microcontroller: ATMEGA328P-AU
  • Operating Voltage: 5V
  • Input Voltage (recommended): DC 7-12V
  • Digital I/O Pins: 14 (D0-D13)
  • PWM Digital I/O Pins:6 (D3 D5 D6 D9 D10 D11)
  • Analog Input Pins: 8(A0-A7)
  • DC Current per I/O Pin: 40 mA
  • Flash Memory: 32 KB of which 2 KB used by bootloader
  • SRAM:2 KB
  • EEPROM: 1 KB
  • Clock Speed:16 MHz




1 ICSP Header ICSP (In-Circuit Serial Programming) Header

ICSP is the AVR, an micro-program header consisting of MOSI, MISO, SCK, RESET, VCC, and GND. It is often called the SPI (serial peripheral interface) and can be considered an "extension" of output. In fact, slave the output devices under the SPI bus host. When connecting to PC, program the firmware to ATMEGA328P-AU.

2 LED indicator(RX) Onboard you can find the label: RX(receive )when control board communicates via serial port, receive the message, RX led flashes.
3 LED indicator(TX) Onboard you can find the label: TX (transmit)

When control board communicates via serial port, send the message, TX led flashes.

4 LED indicator(POW) Power up the control board, LED on, otherwise LED off.
5 LED indicator(L) There is a built-in LED driven by digital pin 13. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.
6 RX0(D0)X1(D1)D2-D13 It has 14 digital input/output pins D0-D13 (of which 6 can be used as PWM outputs). These pins can be configured as digital input pin to read the logic value (0 or 1). Or used as digital output pin to drive different modules like LED, relay, etc.
7 RST Reset pin: connect external button. The function is the same as RESET button.
8 MEGA 328P Each board has its own microcontroller. You can regard it as the brain of your board.

Microcontrollers are usually from ATMEL. Before you load a new program on the Arduino IDE, you must know what IC is on your board. This information can be checked at the top surface of IC. The board’s microcontroller is ATMEGA328P-AU. More info. see the datasheet

9 Type-c USB The board can be powered via Type-c USB connection. Also upload the program to the board via USB port.
10 3V3 pin Provides 3.3V voltage output
11 REF Reference external voltage (0-5 volts) for the analog input pins. Used with analogReference().
12 A0-A7 The Nano has 8 Analog Pins, labeled A0 through A7.
13 5V pin Provides 5V voltage output
14 GND Ground pin
15 VIN Input an external voltage DC7-12V to power the board.
16 Reset Button Used to reset the control board
17 CH340C USB-to-serial port chip, converting the USB signal into Serial port signal.
18 AMS1117 Convert the external voltage input DC7-12V into DC5V, then transfer it to the processor and other elements.

Specialized Functions of Some Pins:

  • Serial communication: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data.
  • PWM (Pulse-Width Modulation): D3, D5, D6, D9, D10, D11
  • External Interrupts: D2 (interrupt 0) and D3 (interrupt 1). These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt() function for details. 
  • SPI communication: D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK).
  • IIC communication: A4 (SDA); A5(SCL)

Windows System

Installing Arduino IDE

When getting this control board, we need to install Arduino IDE Enter the website https://www.arduino.cc/, click thumb and thumb


Select the version you want to download, the latest version could be downloaded.


Alternatively, you could select previous release. In this project, we use 1.8.12 version.


Clickthumb to view the below page


Click thumb to download an installer of Arduino 1.8.12 version,which needs to be installed manually. When you tap thumb,a zip file of Arduino 1.8.12 version will be directly downloaded, and you only need to unzip it to finish installation.


Click thumbicon to download Arduino IDE.

Download CH340 driver:


Installing the Driver

The driver will be installed after downloading Arduino IDE.

If your system is Windows 10, the computer will automatically install driver.
For other systems, like Windows7, we need to install driver manually.
The USB to serial chip of control board is CH340G, therefore, we will install the driver(usb_ch341_3.1.2009.06) for it.
Connect control board to computer with USB cable.
Click Computer----- Properties----- Device Manager, as shown below:

Ks0354 driver 1.png

Then right-click on the device and select the top menu option (Update Driver Software...) shown as the figure below.
Ks0354 driver 2.png

Then it will be prompted to either “Search Automatically forupdated driversoftware” or “Browse my computer for driver software”. Shown as below. In this page, select “Browse my computer for driver software”.
Ks0354 driver 3.png

After that, select the option to browseand navigate to the “drivers” folder of usb-ch341 installation.
Ks0354 driver 4.png

Once the software has been installed, you will get a confirmation message. Installation completed, click “Close”.
Ks0354 driver 5.png

Up to now, the driver is installed well. Then you can right click “Computer” —>“Properties”—>“Device manager”, you should see the device as the figure shown below.

Select the Arduino Board

ClickKs0313图片1.png icon to pen Arduino IDE.

Open the Arduino IDE, you’ll need to click the “Tools”, then select the Board that corresponds to your Arduino.


When downloading the sketch to the board, you must select the correct name of Arduino board that matches the board connected to your computer. As shown below;


Then select the correct COM port (you can see the corresponding COM port after the driver is successfully installed).




  • A- Used to verify whether there is any compiling mistakes or not.
  • B- Used to upload the sketch to your Arduino board.
  • C- Used to create shortcut window of a new sketch.
  • D- Used to directly open an example sketch.
  • E- Used to save the sketch.
  • F- Used to send the serial data received from board to the serial monitor.

Setting IDE for new bootloader

Arduino Nano board could burn new and old bootloader. New bootloader is only compatible with 1.8.9 IDE and above. Yet the old one is compatible with all versions.


Select your serial port

Select the serial device of the Arduino board from the Tools | Serial Port menu.
Note: to avoid errors, the COM Port should keep the same as the Ports shown on Device Manager.


Hello World!

Copy the following code in the Arduino IDE.

int val; 
int ledpin=13; 
void setup()
void loop()
Serial.println("Hello World!");


Then click verify button to check the errors. If compiling successfully, the message "Done compiling." will appear in the status bar.


After that, click the “Upload” button to upload the code. If the upload is successful, the message "Done uploading." will appear in the status bar.


Then click 0486-26.png to open serial monitor and set the baud rate to 9600, enter an “R” and click Send, that is, the computer will send the character R. When NANO board receives it, you should see the RX led on the board flash once, and then D13 led flash once; when keyestudio NANO board sends "Hello World!" to the computer, finally you should see the "Hello World!" is showed on the monitor, and TX led on the board flash once.


MAC System

Install Arduino IDE on MAC System

The installation instruction is as same as the chapter 5.1, as shown below:


Download the Driver of CH340


How to Install teh Driver of CH340

Please refer to the following link: https://wiki.keyestudio.com/Download_CH340_Driver_on_MAC_System

Setting Arduino IDE

The setting method is as same as the chapter 5.6 except from COM port, as shown below: