Sebelumnya telah dibahas apa itu Arduino. Nah sekarang kita mencoba kumunikasi serial Arduino untuk menampilkan tulisan 'HelloWorld' pada komputer. Untuk peralatan yang diperlukan cukup dengan Arduino Board saja. Langsung saja kita buat source code programnya untuk arduino. Tulis code berikut ini pada Arduino Software, kalau belum punya download dulu di sini. Berikut adalah tutorial Lengkap cara membuat interface arduino dan visual basic melalui komunikasi serial. Di video ini teman-teman akan diajari secara komplit dari awal hingga visual basic dapat.

Sometimes when working on an Ardunio project, it is necessary to send data back and forth between a computer. Now, you could use something like the, which would send data over a network, but if you want something easy and free the simplest solution is USB communication. There are several ways to approach Ardunio USB communication, but in this case we will be using on the computer side to send and receive information.

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As such, this instructable expects that you have some prior knowledge of Ardunio, and of Python (or other similar scripting language). Python is a versatile, easy to learn, and easy to use scripting language.

Its power, and huge library of user-created modules (everything from to ) makes it an ideal language for a wide verity of computer side tasks. You could easy parse network information and make an Arduino visualizer, create a game controller, or make a keypad computer login system. Arduino with Python opens up a word of possibilities. On the Computer side of things, we will be using a Python module called. PySerial, coincidentally, allows for the use of serial connections with Python. Installing PySerial on Windows is a pretty simple process.

Note: this 'ible assumes you have Python 2.* installed! If you do not, PySerial will still work, but you may need to change the code slightly to fit with the new standards. To install on Windows, simply visit, download the Windows binary, and run it (at the time of writing, it's pyserial-2.7.win32.exe). Afterwards, test your installation by opening up a new instance of the Python interpreter, and running: import serial. To initiate a connection with the Arduino from Python, we first have to figure out which COM Port the Arduino is on.

This task is luckily made simple by the Ardunio programming environment. Simply look in the bottom right corner of your Arduino IDE, and you will see some text containing the COM Port number. We will use this to initiate our Python serial connection, like so: arduino = serial.Serial('COM1', 115200, timeout=.1) The above code will create a new serial object called 'ardunio' on 'COM1' with a '115200' and a.1 second timeout. It is extremely important that you keep the chosen baud-rate on hand, as it must match exactly with the baud-rate on the Ardiuno side of things.

Now if you open your Arduino serial monitor at a baud rate of 9600, you’ll see a message appearing in your window saying “HI!” every 1 second. Schematics (3.3V FTDI Programmer), follow the next schematics to establish a serial communication between your FTDI programmer and your ESP8266 to upload some code. Downloading ESPlorer IDE I recommend using the ESPlorer IDE which is a program created by 4refr0nt to create and save Lua files into your ESP8266. Follow these instructions to download and install ESPlorer: • to download ESPlorer • Unzip that folder • Go to the main folder • Run ESPlorer.jar • Open the ESPlorer (as shown in the Figure below). Writing Your ESP8266 Script Copy and paste the code below into ESPlorer IDE window. -- Rui Santos -- Complete project details at ledOn = 0 pin=4 gpio.mode(pin,gpio.OUTPUT) uart.on('data', 3, function(data) print('Received from Arduino:', data) if data=='HI!'

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Then if ledOn==0 then ledOn = 1 gpio.write(pin,gpio.HIGH) print('LED On') else ledOn = 0 gpio.write(pin,gpio.LOW) print('LED Off') end end end, 0). Summary: The ESP is configured to listen to serial communications. Every time that receives the string “HI!” at a baud rate of 9600, it will turn the GPIO 2 on or off. Uploading Your Script When you open the ESPlorer IDE you should see a window similar to the preceding Figure, follow these instructions to send commands to your ESP8266: • Connect your FTDI programmer to your computer • Set bad raute as 9600 • Select your FTDI programmer port (COM3, for example) • Press Open/Close • Select NodeMCU+MicroPtyhon tab • Copy the your Lua script into ESPlorer Then you simply click the button Save to ESP and save your file with the name “init.lua”. Everything that you need to worry about or change is highlighted in red box in the following Figure. Final Circuit Follow the next schematics to complete this tutorial. Note: I’m using a voltage divider to shift the TX signal of the Arduino from 5V to 3.3V.