RF Transmission

[Hicks_Man]

Hi guys

Im currently working on taking a temperature from a DS1620 sensor (gives a 9 bit output of the temperature, of which im only using 8 bits), putting it through a little HC08 QT1 then transmitting it through the AM-RT4 transmitter at 433MHz.

I'm having a little trouble getting my head round exactly what format this transmission will take place with.

I've bit banged the 8 bit temperature into the uC, and im adding a ID byte aswell from 2 pins of the uC. Should this just transmit if i feed it into the transmitter?
Where baud rate is 1200 as receiver (Hrr3-433) can only handle 2000.

Cheers for any help on this.

Transmitter **broken link removed**

Receiver **broken link removed**

sensor **broken link removed**

 

[Nigel Goodwin]

You don't mention what micro-controller you're using, but you might find my PIC RF tutorial helpful?.

 

[Russlk]

Transmission should not be a problem. Decoding at the receiver is what you need to be concerned about.

 

[Hicks_Man]

Thanks guys, its a Freescale HC08 im using, the little QT1.

Sounds a bit worrying with your decoding statement, though i admit i haven't put a lot of thought into the decoding element. I assumed my receiver would handle the capture of data quite well and i would feed the data into a uC in a similar fashion to sending it out.

 

[Nigel Goodwin]

Thanks guys, its a Freescale HC08 im using, the little QT1.

Sounds a bit worrying with your decoding statement, though i admit i haven't put a lot of thought into the decoding element. I assumed my receiver would handle the capture of data quite well and i would feed the data into a uC in a similar fashion to sending it out.

Again, I STRONGLY suggest you read my PIC tutorial, although it's not for your processor the explanations will help you a lot!.

The encoding is just as important as the decoding, but it's a lot easier to do the encoding! - but if it's not done correctly the transmission system won't work anyway!.