i need to send a string to UNO R4 from my OPTA and the to use this string with the UNO R4 for other applications , is it possible ? and if yes how to connect them and how to implement it with the code using arduino IDE ?
Surely
To details, see the Serial input basics tutorial
I'm not familiar with the Opta nor am I familiar with Uno R4. Which Arduino R4 are you using; Minima or WiFi?
Looking at the Opta information, you have access to RS485. The Uno R4 xxx does, to my knowledge, not have RS485 but you can add that functionality with a small RS485 module connected to pins 0 and 1 (and one or two additional pins).
There is a UART connection available on the expansion connector of the Opta; that might be an option but I could not find information in the user manual.
Consulted Opta documentation.
1 Like
ive got R4 wifi .
can i use this product to connect the OPTA and the UNO R4 ?
https://www.sparkfun.com/products/10124
I'm not 100% sure because your Uno R4 WiFi is a 5V board. I think you can but don't take my word for it.
You can use something like https://www.robotics.org.za/RS485-MOD (local to me)
Ok ill check it .
Thank you .