So keeping this in mind, do you have any fix for this within I2C whereas I make all of the 7 Arduinos slaves and 1 master and implement the same design? Whereas I only send data from the slaves when a certain action is performed (A tag comes in range of the reader)?
Or could you suggest any other communication protocal? I looked up SPI but it looked like slave select would've been a problem and from my understanding of UART, it could only work between two devices and not more than that.