RF Tranceivers: 27997 vs. 27982
I have serveral of the "old" 433 MHz tranceivers with 2 antenna, model number 27997, previously sold by Parallax.
I see that Parallax no longer sells those, but instead sells a new single antenna RF transceiver, also 433 MHz, model number 27982. The new one uses a pin to switch between transmitting and receiving.
Before I purchase a 27982, I would like to know if it will work with the 27997.
Thanks.
.
I see that Parallax no longer sells those, but instead sells a new single antenna RF transceiver, also 433 MHz, model number 27982. The new one uses a pin to switch between transmitting and receiving.
Before I purchase a 27982, I would like to know if it will work with the 27997.
Thanks.
.
Comments
Thanks for the reply. The way the 'old' 27997 transceivers work is that if the output pin is on ('1') then a continuous 433 MHz signal (sine wave) is sent, and if the output pin is off ('0'), then nothing is sent. So it is a binary on / off signal, nothing more than that.
Do you know if the 'new' 27982 transceivers work the same way? Or is there any inherent protocol above and beyond simply turning on and off a 433 MHz signal?
Otherwise, do you know if anyone else still sells the 28997s?
[Tried Google, but couldn't come up with anything :frown: ]
I believe that Parallax changed the design because LINX came up with transceiver chips so Parallax could manufacture just one device instead of three separate devices (27995, 27996, 27997) and most of the use involved some bidirectional signalling, perhaps as simple as an acknowledgement of reception of a message without error.
I doubt that anyone still sells the 27997 since Parallax doesn't make them anymore.
Thanks for the feedback. It sounds like it should work. I just ordered a couple of 27982's and will test it out myself. I'll update this thread with the results, in the event that anyone else has the same question in the future.