Connecting OPI TTL with an Arduino

[Ahmet Emin Koçal]

I use this method and it works like a charm:
 

void setup(){
  pinMode(0,INPUT);
  pinMode(1,INPUT);
}
void loop(){
}

Just upload this code, and connect GND to GND, TX to RX and RX to TX, then connect your Arduino to your computer, it will get a name like COM3, connect that com port, and you're in! You can also use PuTTY for connecting to the com port.

 

Spoiler

 

[Pongo]

Hello,

you can just connect RESET pin to GND to avoid to upload sketch... as I did with my Orange PI PC and an Arduino Uno R3

 

https://hardwarefun.com/tutorials/using-arduino-as-a-bridge-to-connect-serial-devices-with-pc

 

[Ahmet Emin Koçal]

1 hour ago, Pongo said:

Hello,

you can just connect RESET pin to GND to avoid to upload sketch... as I did with my Orange PI PC and an Arduino Uno R3

 

https://hardwarefun.com/tutorials/using-arduino-as-a-bridge-to-connect-serial-devices-with-pc

 

I also noticed that we don't need even plugging GND to RESET pin, unplugging the Atmega chip does everything

[WarHawk_AVG]

Pretty much a straight thru serial monitor correct?

You can use Arduino Nano as well.

No need to buy a serial to USB uart...it's what arduino does

 

Good howto...thanks!

 

What is cool...with a cheapo ESP8266, you should be able to do the same thing..just use the 3.3vdc output to power the ESP8266
But it's a little more labor intensive...

https://hackaday.io/project/5680-hardware-serial-port-monitor-with-wifi
As with above you can load arduino core directly to the ESP8266, no need to have the arduino between the wifi module and the Orange Pi (as long as you have 3.3vdc [*warning 5vdc will burn out the ESP826!])

 

Same with this

https://github.com/tzapu/WebSocketSerialMonitor

Better video and explanation