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I have seen both XM and XM+ receivers and am wondering which one would be better to get for a micro-drone build. What are the differences in specs? (range, reliability, weight, etc)

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According to Oscar Liang, the XM+:

  • Is larger and heavier than XM (21.5 x 12 x 3.5 mm – 1.6 g)
  • Has diversity antennae, unlike XM
  • Has solder pads in addition to pin headers
  • Doesn't support Smart Port telemetry
  • Has RSSI channel support on a dedicated pad and 16th channel
  • Has a wider input voltage range than XM (3.7v-10v)
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  • $\begingroup$ The XM+ is actually larger and heavier then the XM: XM – 15.0×10.0x3.5mm – 1.0g XM+ (plus) – 21.5x12x3.5mm – 1.6g $\endgroup$
    – Ben Wilson
    Apr 24, 2020 at 4:37
  • $\begingroup$ @BenWilson Oh, you're right! I read that wrong, sorry. $\endgroup$
    – ifconfig
    Apr 24, 2020 at 4:38
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As far as I know, they are almost the same.

The only difference is that the XM+ has a diversity receiver so will be more reliable. It also weighs slightly more and is slightly larger (though it’s a negligible amount in my opinion).

If it were me, I’d go for the XM+ for the extra peace of mind.

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