One to many radios communication

Hardware Radios
1

Hi Guys

I have many 3DR 433MHz radios. My application is one for sending messages continuously and other receiving messages at all time. The problem is receiver received messages unreliably. Sometimes all receivers can receive message at same time. Sometimes a few receivers can receive messages but some of them didn’t. Sometimes all receivers didn’t receive message at all. All radios sutup as same.

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Could you please advise how to setup the radios?

Thanks
Hong

2

In the ones only being configured to receive only, do you have the data TX wire disconnected? Are any configured for two way communication?

3

Thanks Matt

Where to disconnect TX wire?
I do not know which configure is for two way communication,

Thanks
Hong