Wireless Communication from mutliple arduino to a single arduino

Hi all,
I have three UHF RFID readers connected to three Arduino uno's. i need to make these three arduinos communicate to an other arduino wirelessly. the communication must be a long distance one. is it possible to hook up all the three arduinos to one single arduino for communication. is there any module that can do this job Kindly help.

Thanks

Hello aparna97

Take here a view to get some ideas.

Hi @paulpaulson ,
Yes i have gone through this before, but a small doubt. s it possible that i can connect three arduinos to one single arduino . this is mainly done to transmit data from three arduinos to one arduino and then upload the data to the cloud from that arduino.

another technology to consider is Lora - do a web search for arduino lora long distance

yes it possible.
I used HC-12 for connect two transmitters to one receiver.
Of course the two transmitters can only work one by one and not both in time

A ping-pong software communication protocol would be useful.

thanks a lot everyone

Hi @b707 ,
Since am a beginner , it would be really helpful if you can help me with the connection and the code . do you have any sample that you can share with me.

Thanks a lot

This is not something for a beginner. Even programmers with years of experience have trouble with the concept of a master and multiple slave devices and all the error detection and recovery necessary for such a system.

The very first question you must ask yourself is the value of the data and what happen when you loose data and or connections.

If the data has value, then you must validate the communication path between your master unit and each of the slave devices and this requires back and forth communication, echoing a single message and checking for errors and counting the number of errors to see if the path will be usable.

If your data has no value, then there is not much use in spending time and money on such a system.

https://nrf24.github.io/RF24Network/

Meaningless

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