Ks0172 keyestudio UNO with Pin Header Interface
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Introduction
keyestudio UNO with pin headers has the same basic functions as keyestudio UNO R3 BOARD. It is a microcontroller board based on the ATMEGA328P-AU, which has the same function as ATMEGA328P(-PU), fully compatible with ARDUINO UNO REV3.
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, 2 ICSP headers, and a reset button.
This UNO with pin headers makes the improvement based on keyestudio UNO R3 board.
It breaks out all the digital and analog pins in the form of 3PIN headers (G, V, S).
S pins correspond to all 14 digital pins, 6 analog pins. G pins for ground. V pins for VCC. You can control the voltage of VCC via a slide switch for 5V or 3.3V.
When switched to 5V, level on serial communication port is 5V, voltage of pins is 5V. When switched to 3.3V, level on serial communication port is 3.3V, voltage of pins is 3.3V.
It also breaks out two 4PIN headers for serial communication and IIC communication. So it is more easier to connect external sensors and modules.
As for keyestudio UNO R3 board, its voltage-regulator chip is NSP1117. When connect external power, output 5V, drive current is 1A.
But for this keyestudio UNO with headers, its voltage-regulator chip is MP2307DN. When connect external power, output 5V, drive current is 2A.
It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
Tech Specs
| 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 | 6 (A0-A5) |
| DC Current per I/O Pin | 20 mA |
| DC Current for 3.3V Pin | 50 mA |
| Flash Memory | 32 KB (ATmega328) of which 0.5 KB used by bootloader |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| LED_BUILTIN | D13 |
Dimensions
Element and Pin Interfaces
Here is an explanation chart of what every element and interface of the board does:
|
ICSP (In-Circuit Serial Programming) Header
ICSP is the AVR, an Arduino 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 the output. In fact, slave the output devices under the SPI bus host. |
|
Serial Communication Pin
Connect to serial communication. 4Pins (GND, VCC (3.3V or 5V controlled by slide switch), RX, TX) |
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Ground
Ground pins |
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V Pins (VCC)
Power the external sensors and modules. Select the voltage of 3.3V or 5V via a slide switch. |
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Digital I/O
It has 14 digital input/output pins, labeled D0 to 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. The pin D3, D5, D6, D9, D10, and D11 can be used to generate PWM. |
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AREF
For Analog reference. Sometimes used to set an external reference voltage (0-5V) as the upper limit of analog input pins. |
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SDA
IIC communication pin |
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SCL
IIC communication pin |
|
ICSP (In-Circuit Serial Programming) Header
ICSP is an AVR, an Arduino micro-program header consisting of MOSI, MISO, SCK, RESET, VCC, and GND. Connected to ATMEGA 16U2-MU. When connecting to PC, program the firmware to ATMEGA 16U2-MU. |
|
Microcontroller
Each control board has its own microcontroller. You can regard it as the brain of your board. |
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D13 LED
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. |
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RX LED
Onboard you can find the label: RX(receive ) |
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TX LED
Onboard you can find the label: TX (transmit) |
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Power LED
LED on means that your circuit board is correctly powered on. Otherwise LED is off. |
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USB Connection
You can power the board via USB connection. Or can upload the program to the board via USB port. |
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ATMEGA 16U2-MU
USB to serial chip, can convert the USB signal into serial port signal. |
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Slide Switch
You can slide the switch to control the voltage of pin V (VCC), 3.3V or 5V. |
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Voltage Regulator
To control the voltage provided to the UNO board, as well as to stabilize the DC voltage used by the processor and other components. |
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DC Power Jack
The board can be supplied with an external power DC7-12V from the DC power jack. |
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IOREF
Used to configure the operating voltage of microcontrollers. Use it less. |
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RESET Header
Connect an external button to reset the board. The function is the same as reset button |
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Pin 3V3 Output
Provides 3.3V voltage output |
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Pin 5V Output
Provides 5V voltage output |
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Vin
You can supply an external voltage input DC7-12V through this pin to the board. |
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Analog Pins
The UNO board has 6 analog inputs, labeled A0 through A5. |
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IIC Communication Pin
Connect to the IIC communication. |
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RESET Button
You can reset your board to start the program from the initial status. |
Specialized Functions of Some Pins:
- Serial communication: Digital pins 0 (RX) and 1 (TX).
- PWM Interfaces (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.
- SPI communication: D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK). These pins support SPI communication using the SPI library.
- IIC communication: A4 (SDA); A5(SCL)
Detailed Test with ARDUINO Software as follows:
Detailed Test with ARDUINO Software as follows:
Step1 | Download the Arduino environment (IDE)
When you get the UNO board, first you should install the Arduino software and driver.
We usually use the Windows software Arduino 1.5.6 version. You can download it from the link below:
https://www.arduino.cc/en/Main/OldSoftwareReleases#1.5.x
Or you can browse the ARDUINO website to download the latest version from this link, https://www.arduino.cc, pop up the following interface.
Then click the SOFTWARE on the browse bar, you will have two options ONLINE TOOLS and DOWNLOADS.
Click DOWNLOADS, it will appear the latest software version of ARDUINO 1.8.5 shown as below.
In this software page, on the right side you can see the version of development software for different operating systems. You should download the software that is compatible with the operating system of your computer.
We will take WINDOWS system as an example here. There are also two options under Windows system, one is installed version, the other is non-installed version.
For simple installed version, first click Windows Installer, you will get the following page.
This way you just need to click JUST DOWNLOAD, then click the downloaded file to install it.
For non-installed version, first click Windows ZIP file, you will also get the pop-up interface as the above figure.
Click JUST DOWNLOAD, and when the ZIP file is downloaded well to your computer, you can directly unzip the file and click the icon of ARDUINO software to start it.
Installing Arduino (Windows)
Install Arduino with the exe. Installation package downloaded well.
Click“I Agree”to see the following interface.
Click “Next”. Pop up the interface below.
You can press Browse… to choose an installation path or directly type in the directory you want.
Then click “Install” to initiate installation.
Wait for the installing process, if appear the interface of Window Security, just continue to click Install to finish the installation.
Installing Driver
Next, we will introduce the driver installation of UNO board. The driver installation may have slight differences in different computer systems. So in the following let’s move on to the driver installation in the WIN 7 system.
The Arduino folder contains both the Arduino program itself and the drivers that allow the Arduino to be connected to your computer by a USB cable. Before we launch the Arduino software, you are going to install the USB drivers.
Plug one end of your USB cable into the Arduino and the other into a USB socket on your computer.
When you connect UNO board to your computer at the first time, right click the icon of your “Computer” —>for “Properties”—> click the “Device manager”, under “Other Devices”, you should see an icon for “Unknown device” with a little yellow warning triangle next to it. This is your Arduino.
Then right-click on the device and select the top menu option (Update Driver Software...) shown as the figure below..
It will then be prompted to either “Search Automatically for updated driversoftware” or “Browse my computer for driver software”. Shown as below. In this page, select “Browse my computer for driver software”.
After that, select the option to browseand navigate to the “drivers” folder of Arduino installation.
Click “Next” and you may get a security warning, if so, allow the software to be installed. Shown as below.
Once the software has been installed, you will get a confirmation message. Installation completed, click “Close”.
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.
Introduction for Arduino IDE Toolbar
Double-click the icon of Arduino software downloaded well, you will get the interface shown below.
(Note: if the Arduino software loads in the wrong language, you can change it in the preferences dialog. See the environment page for details.)
The functions of each button on the Toolbar are listed below:
 Verify/Compile
|
Check the code for errors |
|---|---|
 Upload
|
Upload the current Sketch to the Arduino |
 New
|
Create a new blank Sketch |
 Open
|
Show a list of Sketches |
 Save
|
Save the current Sketch |
 Serial Monitor
|
Display the serial data being sent from the Arduino |
Step2| Connect the board
Connect the UNO board to your computer using the USB cable. The red power LED should go on.
Step3| Select the Arduino Board
Open the Arduino IDE, you’ll need to click the “Tools”, then select the Board that corresponds to your Arduino.
Step4| Select the Serial Port
Select the serial device of the Arduino board from the Tools | Serial Port menu. This is likely to be COM3 or higher (COM1and COM2 are usually reserved for hardware serial ports). To find out, you can disconnect your Arduino board and re-open the menu; the entry that disappears should be the Arduino board. Reconnect the board and select that serial port.
Here you should select COM 3 as below.
Note: to avoid errors, the COM Port should keep the same as the Ports shown on Device Manager.
Step5| Upload the Program
Below is an example program for displaying the Hello World! Copy and paste the code to the Arduino environment IDE.
int val;
int ledpin=13;
void setup()
{
Serial.begin(9600);
pinMode(ledpin,OUTPUT);
}
void loop()
{
val=Serial.read();
if(val=='R')
{
digitalWrite(ledpin,HIGH);
delay(500);
digitalWrite(ledpin,LOW);
delay(500);
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. Wait a few seconds - you should see the RX and TX leds on the board flashing. If the upload is successful, the message "Done uploading." will appear in the status bar.
A few seconds after the upload finishes, you should see the pin 13 (L) LED on the board start to blink. If it does, congratulations! You've gotten Arduino up-and-running.
Step6| Open the Serial Monitor
After that, click the serial monitor button to open the serial monitor.
Then set the baud rate as 9600, enter an “R” and click Send, you should see the RX led on the board blink once, and then D13 led blink once, finally "Hello World!" is showed on the monitor, the TX led blink once. Congrats!
For Extension:
Other Links:
You can download the datasheet from the link:
https://drive.google.com/open?id=1otyBI7as3S5qBd9GZYyVwYdRMLF7qDnr
Software Download:
https://drive.google.com/open?id=12D-JkXdNm03Qt4dlPQr3RP6OmgXqpvHc
You might also want to look at:
the reference for the Arduino language;
Troubleshooting:
If you have problems, please see the troubleshooting suggestions.