I got these as a replacement for a few of these FS1000A and XLC-RF-5V modules, because whatever I did, the range of the old modules was somewhere between a dozen cm and a meter. I found these modules via some wiki page after doing some research.
I did not test the range out in the open, but these easily covers my room, and almost kind of works when I stand outside, 10m away from my 3rd floor studio. So don't expect miles of ranges with the supplied antennas, but certainly good enough for hobby use.
Shipping took a while of course, but they were properly packaged in bublewrap and anti-static bags.
Documentation is not very extensive, but more than sufficient. What I could not find though, is why there is a second pair of headers for ground and antenna.
What I really like about this receiver is that it has a wide voltage range, so I can run everything from both 3.3V or 5V.
I'm using this antenna for testing LoRa sensor devices. I have had the problem that the attenuation for sending indoor is lowering my transmitting distance so I originally used this antenna on my window bank outdoors. It was working very fine.
In the meantime I use it through the magnetic mount on the roof of my car successfully. I describe my setup here: https://stefan.schultheis.at/2017/lora-reichweite-ttnmapper/ (Sorry, it's in German)
April 13, 2017
Nice little UHF receiver/DTMF decoder & momentary switch
Using a UHF transmitter, you can remotely have the SA809-RX send from 3.3 volts to 6.0 volts ( up to 4 amps) through a circuit for 3 seconds. You cannot change the momentary pulse from the fixed 3 seconds, nor can you deviate from the voltage range, unless you use the output to drive a relay with a different voltage across it.
You program the DTMF tone sequence that the unit will respond to and the frequency (400—480MHz) via a NiceRF website downloadable Microsoft Windows based program. Using the software, you can also set a timeout value up to 30 minutes where the unit will not respond to the DTMF sequence. The unit is programmed via a standard USB cable. You must use their program to configure the unit. The documentation could be better, but the nice people at NiceRF quickly responded to all of the questions that I emailed to them.
The unit is very compact, sturdy and reliable. If the functionality meets your requirements, then this is an amazing little unit. I personally would love it, if the unit could toggle the output high/low via 2 sets of DTMF tones instead of the fixed 3 second pulse.
Really great kit - I also bought a couple of the barebones ones as well as this kit to get me rolling. The kit comes with no clues whatsoever but if you visit the nicerf.com website you can download what you need, and that's the only lost star that I had to hunt it down for myself.
This kit contains just about all you need to get running - start by soldering the power and TX/RX to the cable for the USB/UART board, and add the speaker and 100k pot and antenna and that's all you need. Install the USB driver with the device installed, works great on W10, install the free programming software from the nicerf site, and set the COM port. That can take a little experimentation, mine was on COM9, but once I'd found that port it was so simple to programme frequencies.
Board has a tiny PTT and mic onboard, and you can power from a hacked USB power cable/power bank no problem. You can even select the channel (from the supported 16) on the little board with a teensy little hex encoder - so 0 maps to ch1, 9 to ch10, A to ch11, F to ch16. Tested with a Mitex business walkie talkie, works great. Really nice little kit and TINY!
I do like NiceRF --All their products have performed well for me. The 610 is no exception. It's compact (about the size of a BLE, smaller even) making it great for those tight fit/light weight builds. The antenna is your standard coil-wrapped wire and works well; but if you want longer distance, you can wire in a regular antenna. Documentation is good; support is awesome. (I ding on shipping, just because they don't have a post-delivery, just registered mail increasing the cost; but it's a reasonable amount for over seas, registered mail. -- If there was an 'overall' star rating, it would get the full 5 stars!)
May 30, 2015
NiceRF SA828U works well with Raspberry Pi and Direwolf TNC
Initially, I meant to purchased the VHF version, but ended up purchasing the UHF version by mistake. I'm not using these modules as walkie talkies, but to transmit APRS packets. The SA828U works as expected when paired with a Raspi, a GPS module and Direwolf SW TNC as a APRS tracker. The VOX and PTT also worked as expected for triggering the transmitter. Great little inexpensive modules for your radio projects. English documentation could be better.
Response from NiceRF | June 1, 2015
Thanks so much for your nice feedback! if you have any new project,pls contact with us. our company are pleasure to offer technology support! Best regards, NiceRF