Oct 07, 2016  Komunikasi serial adalah komunikasi yang pengiriman datanya per-bit secara berurutan dan bergantian. Komunikasi ini mempunyai suatu kelebihan yaitu hanya membutuhkan satu jalur dan kabel yang sedikit dibandingkan dengan komunikasi paralel. 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.

> > 04.Communication > MultiSerialMega MultiSerialMega Sometimes, one serial port just isn't enough! When trying to communicate with multiple serial enabled devices, while also sending info back to the main serial window, a few extra RX/TX ports can be a welcomed thing. This example makes use of one of Arduino and Genuino Mega's 3 auxiliary serial ports, routing any incoming data read on that connection straight to the main TX line, and, in turn, to the main serial window for you to view. Hardware Required.

See Also • () • () • () • () • - Demonstrates Arduino's advanced serial output functions. • - Move the mouse to change the brightness of an LED. • - Send data to the computer and graph it in Processing. • - Send MIDI note messages serially. • - Turn a LED on and off by sending data to your board from Processing or Max/MSP.

• - Parse a comma-separated string of integers to fade an LED. • - Send multiple variables using a call-and-response (handshaking) method. • - Send multiple variables using a call-and-response (handshaking) method, and ASCII-encode the values before sending. • - Demonstrates the use of SerialEvent().

• - Send multiple variables from Arduino to your computer and read them in Processing or Max/MSP. Last revision 2015/07/29 by SM.

44 thoughts on “ Raspberry Pi and Arduino Connected Over Serial GPIO” • Siva Sankar Hello, I used the same wiring method and the data exchange is good. However it is not reliable, when i run a ping pong data exchange simultaneously for thousands and millions of time in a loop, and at the same time performing some motor controls from arduino (Motors are known to draw current up to 0.8 A), the data is getting corrupted. The data corruption happens when the setup demands more current (for controlling motors). Measures taken by me to solve this problem, > i have added shield to the wires Tx and Rx. > grounding is verified properly. Still i dont know how when the setup draws more current, the data on Tx and Rx is corrupted. Any help will be appreciated.

↓ • roger Hello, I have a similar situation. I’d like to connect an Arduino Uno to a 3.3v sensor through RX/TX Now I understand Arduino-TX -> sensor-RX needs a voltage divider ( so the 5V of the arduino doesn’t break the sensor). Now I’d expect the 3.3V from the sensor TX to Arduino-RX to be “safe”, however you mention in some situations the Arduino-RX can be at 5V, which would then go to the sensor and might break it So question ( assuming not using a level-divider) – why not have 2 voltage dividers? ( for both TX-RX and RX-TX connections) – could we put a schottky diode between the “Arduino-RX” to “sensor-TX”, to make sure there can only be a flow from the sensor to the Arduino, and and the diode blocks the other way around ( note: n00b here, so I might be completely misunderstanding it ).

↓ • Ralf S Hey Oscar! I just found your (super) instructions, and wanted to go through it.

Funny, I already fail on the very beginning. On my Raspi3 the /etc/inittab file doesn’t exist. It seems it’s gone nowadays, see raspberrypi.org/forums/viewtopic.php?f=66&t=123081 But also when I follow the steps in the linked doc to deactivate getty, I don’t get your tutorial to work. Hooking an oszilloscope to the Tx output of the raspi I don’t see anying coming there, so the minicom remains dead silent. Any hints on how to get this going with a new setup?

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Thanks, Ralf. ↓ • lcsbngg Hello, I have a question and i can not find the answer so maybe you can help me. I have a raspberry pi with a python program (Tweet monitor learn.sparkfun.com/tutorials/raspberry-pi-twitter-monitor) When a tweet is found with the term i want it turn on a led (GPIO 22 HIGH) And i have a other program (a clock with 18 7-segment display) on a arduino mega, when a button is push (Pin 7 HIGH) the clock decrease one second. Laura branigan now. I wanted to know if it’s possible to plug the GPIO 22 (rpi) to the Pin 7 (arudino) and the GND to GND. I was afraid to kill the raspberry (because raspberry 3.3V and arduino 5V apparently) but in my situation it’s from the raspberry to arduino and only this way not the other. Thanks and sorry about my english.;).