Hello
what is the best way to transfert at 433MHz via Aurel Modules three analog inputs 0 to xx mV or 0 to 5V ???

Nobody use a 433MHz transmissions in my location, so i think that I dont need to coding data

Modules are Aurel Tx boost 400mW (AM) and Rx is superheterodyne receiver

 

no one can help me ?
http://www.aurelwireless.com/wp-content/uploads/user-manual/650200689G_um.pdf

 

Hello,

Do you have the datasheets of the transmitter and reciever?

Bertus

 

Tx : http://www.futuraelettronica.net/pdf_ita/8110-TX433BOOST.pdf
Rx : http://www.pro4wireless.com/manualer/moduler/manual_arf09.pdf

Ok, Tx is Aurel and Rx is Adeunis, but there are compatible, I used this modules few years past in 16 channel remote control, and they perfectly work

 

Hello,

From the datasheets I can tell the modules are designed for digital communication.
If you want to transfer the analog signals using these modules, the signals need to be digitized.

Bertus

 

ok, but the question is how can I digitize the 3 analog inputs ?
how is the best IC to do this, and how can I do to serialise the 3 digital data ?
It will be ok with the DTMF coder/decoder ?

 

A microcontroller can do both digitizing and serialising the data, as well as error checking and ensuring the packet was delivered.

 

It will be ok with the DTMF coder/decoder ?

No - the modulation frequency is only 4KHz, so any 'digitized' analogue signal can only have a maximum frequency of 2KHz (Nyquist Theorem max --in practice a bit less!)

As kubeek says, it's best to use a microcontoller to 'digitize' your data, but you need to keep the 'analogue audio' bandwidth below 2KHz....

 

but DTMF is lower than 2KHz ?!
THe highest frequency in dtmf is 1477 Hz
http://www.mediacollege.com/audio/tone/dtmf.html

 

have you a web link with a µC project ?

 

Hello,

You can not use the DTMF devices as the signals are still analog.
The modules ONLY accept digital signals.

As for the analog signals:
How fast and how accurate do you want to transmit them.
A higher number of bits used for the digitizing will reduce the speed of transmission.

Bertus