View previous topic :: View next topic |
Author |
Message |
TSEYFARTH
Joined: 01 Jul 2006 Posts: 1054
|
Posted: Fri Jul 25, 2014 8:06 am Post subject: HopeRF RFM24W |
|
|
Hello all,
Has anyone done any work with the HopeRF RFm24W? http://www.hoperf.com/rf/fsk_module/RFM24W.htm
This is an interesting part with nice features including low cost, high power output and low power consumption. Not to mention that it may be the next generation/replacement for the RFM12 and/or RFM22 series.
If anyone has any experience with it, I would appreciate your feed back, and any starter code you may be willing to share!
Thanks,
Tim
(BASCOM-AVR version : 2.0.7.7 ) |
|
Back to top |
|
|
six1
Joined: 27 Feb 2009 Posts: 553
|
|
Back to top |
|
|
TSEYFARTH
Joined: 01 Jul 2006 Posts: 1054
|
Posted: Fri Jul 25, 2014 6:54 pm Post subject: |
|
|
Hi Six1,
Thanks for your reply. The RFM69 uses too much power, the 24W uses much less and has double the output than the RFM12b. I have the 12b working, but need the additional range that that 24W promises.
I appreciate your feedback however and the links.
Tim |
|
Back to top |
|
|
EDC
Joined: 26 Mar 2014 Posts: 971
|
Posted: Sat Jul 26, 2014 1:08 am Post subject: |
|
|
In our country RFM12 "is in promotion" now and 12zł (3 EURO) cost. I want start with this module ..but .. i want to write application for mobile to monitoring and setting parameters via BT. If anyone can propose good module to start with Bluetooth or even BT + RF please let me know. |
|
Back to top |
|
|
six1
Joined: 27 Feb 2009 Posts: 553
|
Posted: Sat Jul 26, 2014 9:11 am Post subject: |
|
|
i'm using the BTM222.
High output for ~100m range and easy serial connection with AT commands.
I've made an EAGLE component for BT antenna (also the BTM222!), so this is always on PCB.
if you are intersted on this, send an email michael [AT] koecher-web [dot] de _________________ For technical reasons, the signature is on the back of this message. |
|
Back to top |
|
|
TSEYFARTH
Joined: 01 Jul 2006 Posts: 1054
|
Posted: Sat Jul 26, 2014 7:00 pm Post subject: |
|
|
Hello all,
I get about 400 feet out of an RFM12b. The RFM24W is 2x the output power (5dBm Vs 10dBm) and 3mA less cost. Standby current is much less at 50nA Vs 300nA on the RFM12b.
Cost is about 4 USD, I believe. Also, if anybody is interested, have about 100 RFM12b's in the SMT package as well as some with the 2mm header package. I also have some RFM22 and RFM23's (I think). These are all new, just ones that I had gotten to play with but will never use since changing to the RFM24w. Contact off list if interested please.
Tim |
|
Back to top |
|
|
mmarlette
Joined: 30 Nov 2007 Posts: 311 Location: Delano, MN
|
Posted: Sun Jul 27, 2014 5:39 pm Post subject: |
|
|
Tim,
What can of range can be expected from the 24W module?
Looked at the datasheet but not an RF Engineer.
I know most is based upon terrain, but line of sight is a good reference baseline.
Thanks,
Mark |
|
Back to top |
|
|
TSEYFARTH
Joined: 01 Jul 2006 Posts: 1054
|
Posted: Sun Jul 27, 2014 8:39 pm Post subject: |
|
|
The hope is double the range, but it may be less than that, or possibly more. A LOT depends on the antenna chosen, the layout of the PCB and particular attention to the size, shape, position of the ground plane with respect to the antenna. That, is the single biggest pain (aside from getting the part to talk to the uC) in the project. Black magic - that is for sure!
Tim |
|
Back to top |
|
|
Dave
Joined: 05 Feb 2005 Posts: 314 Location: OR
|
Posted: Mon Jul 28, 2014 12:47 am Post subject: |
|
|
Also there is a higher power version of the rfm24w. The rfm26w has +20dBm output. That would have about the same range as the rfm22 which for me
using a 1/4wave length wire for the antenna had a range of about 1/2 mile (800M). |
|
Back to top |
|
|
mmarlette
Joined: 30 Nov 2007 Posts: 311 Location: Delano, MN
|
Posted: Mon Jul 28, 2014 1:00 am Post subject: |
|
|
Dave,
That is a pretty good distance.
What kind of data transfer rates do you obtain at that distance or any distance to data transfer rates data?
Regards,
Mark |
|
Back to top |
|
|
Dave
Joined: 05 Feb 2005 Posts: 314 Location: OR
|
Posted: Mon Jul 28, 2014 1:35 am Post subject: |
|
|
Mark,
That range was at 56kbs. Slower data rates should increase the range but I have not tested that.
Dave |
|
Back to top |
|
|
mmarlette
Joined: 30 Nov 2007 Posts: 311 Location: Delano, MN
|
Posted: Mon Jul 28, 2014 3:28 am Post subject: |
|
|
Dave,
Not bad at all.
Will have to put this on my to check out list.
Have a project that might be able to use these capabilities.
Thanks for the info!!
Mark |
|
Back to top |
|
|
Dave
Joined: 05 Feb 2005 Posts: 314 Location: OR
|
Posted: Mon Jul 28, 2014 4:04 am Post subject: |
|
|
Mark
I'm working with Tim to try the new rfm24w. I'll report there range when/if we get them working.
Dave |
|
Back to top |
|
|
mmarlette
Joined: 30 Nov 2007 Posts: 311 Location: Delano, MN
|
Posted: Mon Jul 28, 2014 2:44 pm Post subject: |
|
|
Dave / Tim,
Good luck and that would be GREAT!!!!
Regards,
Mark |
|
Back to top |
|
|
mmarlette
Joined: 30 Nov 2007 Posts: 311 Location: Delano, MN
|
Posted: Wed Dec 03, 2014 2:07 am Post subject: |
|
|
Checking up, any progress to report?
Data transfer rates and range info?
Thanks!!!!!
Mark |
|
Back to top |
|
|
|