i need to connect 5 arduino to raspberry pi via uart because every arduino will connects to sensors and sends the reading to raspberry pi and raspberry pi will send commands to them and also upload data to a web server .
mjshms: i need to connect 5 arduino to raspberry pi via uart
It would help if you describe what is preventing you - is this a RaspberryPi problem or an Arduino problem?
Have you done any tests? Please describe the tests.
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The answer is yes and it could be done with RS485 or several other multi drop systems. Also wireless will also work. Good Luck & Have Fun! Gil