Using the RF module 433 Mhz

Using Arduino Sensors
1

Hello

I have some questions about the RF 433 Mhz module (transmitter - receiver) :
That would be very nice of you. If you help me.

1 - Can it connect a sensor to an Arduino ( Example: a PIR to an Arduino).

2 - if, yes : can we use only the transmitter with the sensor and a power source without a microcontroller or we will always need a microcontroller to manage the connection.

3 - what about sensors like DTH11 that have to send data ... And not an electrical signal. Do they need a microcontroller.

4- Can we use a single receiver for several transmitters ... ( Example : an Arduino with a receiver connected to several sensors with each one its transmitter :

  • For the same sensors ( 3 PIR connected to an arduino)
  • And for different sensors (1PIR + 1Ultrasound + Photoresistance)

4 - Several sensors (Photoresistance, PIR, Ultrasound) can be linked to a single 433 Mhz RF Transmitter.

Thanks a lot

modules-emetteur-et-recepteur-rf-433-mhz.jpg

2

start with RF module modulation methods - Introductory Tutorials - Arduino Forum

the RF433 module works at one frequency. ergo you use it for one sensor. I would use it for OOK only.

the HC12 module sends serial data, and can be set to use many channels. I would use that for weather and environmental sensors like the DHT11

3

HC-12 looks very interesting, I'll give it a try.

1 - Is it good for creating a communication lift of 30 Arduinos?.

In my research, I found the NRF24L01 module which seems to be good to create a communication network of several Arduinos.

I saw that there are two models:

  • NRF24L01+PA +LNA with antenna.
  • NRF24L01 + without antenna
    2- I would like to know if these two models can communicate with each other?

3- According to you, what is the best wireless module to create a communication raiseau of 30 Arduinos ?

Thank you very much.