Connecting multiple arduino


i doing project of measuring multiple weight simultaneously,  in there multiple hx711 connect respective load sensor. searched net , forum connecting multiple hx711 single arduino no fruitful result found. considering individual uno each hx711 , connecting thats unos mega transfer data(float) . mega pass data computer via serial. should able communicate atleast 7 unos via mega. communication between arduinos confused regarding method used whether i2c or spi or uart or individul software serial. easiest i2c concerned regarding speed need updated data of uno within 1- 1.5 s. i2c okay speed. or suggest other method.



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