How to send datas at once

Projects Networking, Protocols, and Devices
1

Hi.I dont know how to send datas(date,time,temperature,humidity,etc) via I2C between a few UNOs.Sending them one by one is easy.Please help me how to send datas at low freq.(1s update will be fine)Thank You....

2

give every UNO a own unique slave address and it should not be a problem.
You must send it to the UNO's one by one...

3

I know that and sending for example time works fine.But how can I do all at once.

4

A ways down this page Nick explains how to broadcast from one master to multiple slaves at once. Slaves must be configured to respond to broadcast to address 0x00. Gammon Forum : Electronics : Microprocessors : I2C - Two-Wire Peripheral Interface - for Arduino