Hello, Is it possible to send AND receive data between two arduinos? I am getting and processing data (20 sensors) on one, and have another coupled with ethernet shield that populates database and getting input from web page. I would need so send a lot of data for web representation and debugging to the second board, but also be able to send commands from web to the first one..

Welcome, yes it is possible. Lots of communication protocols available. Ask a moderator to move your thread to a more appropriate section using the flag icon

Very possible - consider a NRF24 for example.

Welcome to the forum Your topic was MOVED to its current forum category as it is more suitable than the original It has nothing to do with Installation and Troubleshooting of the IDE

Yes, sorry, i am natural blond, Thank you for creaning after my fault. Thks TK

No, it must be serial. i have all taken - spi, onewire etc First board has more wires than monk's head has hair. I don't trust wireless, have rx/tx free Actually the question is for serial communication and is global and is not explicitly answered on internet. Can a board be master and slave? How to do it if yes.

[image] huckelberryfinn: have rx/tx free Which type of boards are you using ?

I can't help with that - not a lot of experience with this. I prefer wireless for myself.

[image] huckelberryfinn: Can a board be master and slave? How to do it if yes. There is no 'master' or 'slave' with serial, other than what you define in your code. You just send stuff on Tx and the other board receives it on its Rx. If you want to make one board the master you can, but that has nothing to do with how serial works. I suggest you study the tutorial, write some code and come back to this topic* if you get stuck. *Please don't start another topic, the context of what has been said here will be useful in providing more help if you need it.

Two way serial communication between two boards

Projects General Guidance

PerryBebbington August 29, 2022, 10:06am 6

I suggest you start here: Serial Input Basics - updated

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Two way serial communication between two boards

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