The JeeNode uses the RFM12B. Has there been a comparison done between the other HopeRF transceivers? Is it possible to use any of these with the JeeNode? The RFM12BP looks like will give you more distance, whereas the RFM22 and RFM23 look like they would use even less power then the RFM12B in standby.
Other HopeRF transceivers
(2 posts) (2 voices)-
Posted 08/12/2009 20:53:19
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Yes, this has been mentioned before - search for RFM22 and RFM12BP on this forum... the RFM12BP has a completely different physical layout and requires an extra 12V, IIRC. It looks like it's compatible on the logic/software side (not 100% sure about switching between RX and TX).
The RFM22 has lower standby power, probably lower power during use because it doesn't need an interrupt per byte (just one when the packet is complete), but higher power use during receive and transmit. They have a slightly different pinout / pad layouts, but the total module dimensions remain the same, and they are about twice as expensive.
My guess would be that the RFM23 is not allowed in Europe, with its higher transmit power.
So there you go... all the trade-offs are on a silver platter. IMO the RFM12B still has a long and glorious life ahead :)
PS. I'll start doing more with tags on this forum. That way it might be easier to find related posts.
Posted 08/12/2009 22:15:17