• Komunikasi Serial Port
• Komunikasi Serial Arduino Programming
• Komunikasi Serial Arduino Uno

Hello sahabat Anak kendali. Pada kesempatan kali ini saya akan menuliskan tutorial sederhana tentang Arduino, ESP8266 Komunikasi Serial dengan Nodemcu atau Wemos.dimana keduanya antara Arduino dan modul ESP8266 seperti nodemcu atau wemos akan saling mengirim data atau menerima data, untuk menghubungkan keduanya saya menggunakan komunikasi serial.tujuan dari menghubungkan modul ini banyak hal.

In this tutorial you’re going to learn how to send data from an Arduino to the ESP8266 via serial communication.

Before you continue reading this project, please complete the following tutorials:

If you like the ESP WiFi module and you want to build more projects you can download my eBook called “Home Automation using ESP8266” here. Let’s get started!

Watch the video demonstration below

Parts List

Komunikasi Serial Port

Here’s the hardware that you need to complete this tutorial example:

• 1x ESP8266 – read Best ESP8266 Wi-Fi Development Boards
• Arduino UNO – read Best Arduino Starter Kits

You can use the preceding links or go directly to MakerAdvisor.com/tools to find all the parts for your projects at the best price!

Build 25 cool Arduino projects with our course even with no prior experience DOWNLOAD »

Build 25 cool Arduino projects with our course even with no prior experience DOWNLOAD »

Uploading Your Arduino Sketch

The Arduino sketch for this tutorial is very simple.

You begin a serial communication in the setup() function at a baud rate of 9600. Then in the loop() function it prints “HI!” continuously every 1 second (that message will be received by your ESP later).

Copy the sketch below to your Arduino IDE and upload it to your Arduino board.

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)

Having your ESP8266 flashed with NodeMCU, 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:

1. Click here to download ESPlorer
2. Unzip that folder
3. Go to the main folder
4. Run ESPlorer.jar
5. Open the ESPlorer (as shown in the Figure below).

Writing Your ESP8266 Script

Copy and paste the code below into ESPlorer IDE window.

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:

1. Connect your FTDI programmer to your computer
2. Set bad raute as 9600
3. Select your FTDI programmer port (COM3, for example)
4. Press Open/Close
5. Select NodeMCU+MicroPtyhon tab
6. 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. This works well for slow baud rates, but it might not work at faster baud rates. Read this blog post for more information about lowering the voltage of signals.

Demonstration

Now your LED should be blinking every one second. This means that your Arduino is sending the string “HI” and your ESP is receiving that data. Watch the video at the beginning of this post for a live demonstration.

Now instead of sending a string saying just “HI!”, you can attach sensors to your Arduino and send that data to your ESP instead. Later you can build a web server that displays that data.

Komunikasi Serial Arduino Programming

Read Next…

You might also find interesting trying one of these tutorials:

Do you have any questions? Leave a comment down below!

Thanks for reading. If you like this post probably you might like my next ones, so please support me by subscribing my blog.

Description

Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART), and some have several.

On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board.

Komunikasi Serial Arduino Uno

You can use the Arduino environment’s built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin().

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Serial communication on pins TX/RX uses TTL logic levels (5V or 3.3V depending on the board). Don’t connect these pins directly to an RS232 serial port; they operate at +/- 12V and can damage your Arduino board.

To use these extra serial ports to communicate with your personal computer, you will need an additional USB-to-serial adaptor, as they are not connected to the Mega’s USB-to-serial adaptor. To use them to communicate with an external TTL serial device, connect the TX pin to your device’s RX pin, the RX to your device’s TX pin, and the ground of your Mega to your device’s ground.