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Anyone out there tried the 3DR 915 MHz radio modules for telemetry? They claim a pretty decent range, better than an XBee Pro, and they're only about $40 a set.
Read the specs carefully. Range is dependent on transmitter power, transmitter antenna gain, receiver antenna gain and sensitivity, and line-of-sight interferences, so be carefull to compare apples to apples. Antennna design is critical to range at these frequencies, and gain is dependent on design and directionality. The data rate is also range dependent: sending data at 200 kbps has a much shorter range than 10 kbps.
I suspect the commercial unit may perform better than the hobby unit, but it will also cost a little more.
Bob
There's been some discussion about how much range they really get -- see https://diydrones.com/forum/topics/the-real-specs-and-ranges-for-3dr-radios . FWIW, I've been happy with the XBee 900 Pro XSC, and there is a new version of that out for the same price (around $40 a module) that has twice the output power (stated range 9 miles dipole-to-dipole), lower current, etc, so I quit thinking about the 3DR.Anyone out there tried the 3DR 915 MHz radio modules for telemetry? They claim a pretty decent range...
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