The FrSky XM+ & XSR receivers are one of the most popular long range receivers in their receiver product line. FrSky has been around for quite some time now and most probably have a few FrSky receivers lying around.

Let us dig deeper into this article on their pros & cons and finally see which one is better between the FrSky XM+ & XSR and is suited for you.

 

FrSky XM+

 

The FrSky XM+ is a mini receiver from FrSky developed mainly for mini quads where size is a constraint. This mini receiver is a full-range RX meaning, it is as good as any other full-range receivers from FrSky in terms of range - like compared to the XSR along with diversity antenna.

 

Pinout

 

The receiver is very tiny and has only 3 pins - Power, Signal, Ground. This makes it extremely easy to connect and wire you FrSky XM+ to your Flight Controller. There is an option to use the CH16 from the receiver as the RSSI output channel for your flight controller; to enable this, just update your XJT module and XM+ receiver to the latest firmware.

There is also an analog RSSI output pad where you can solder a wire directly to the Flight Controller to receive analog RSSI value from 0~3.3V. This is useful if your Flight Controller doesn’t accept RSSI from the S.Bus line.

 

Power

Since the FrSky XM+ is a small receiver it doesn’t consume much power - only 30mA at max when operating at 5V. The FrSky XM+ does have a wide input voltage range of 3.7~10V which is good enough for 1~2S builds but it is recommended to use a stable 5V supply from your Flight Controller to prevent the receiver from resetting during voltage sag while flying on 1S.

 

Footprint

The FrSky XM+ is a very small receiver weighing in at just 1.6g and has a small footprint of 21.5*12.*3.5mm. This ensures that it can fit even in tight builds like a small whoop style craft.

 

FrSky XSR

 

The FrSky XSR receiver is another full range receiver from FrSky with diversity. The biggest plus point is that it supports SmartPort so that your flight controller can do full telemetry with your transmitter.

  

 

Pinout

The FrSky XSR has 5 pins - Ground, Power, S.port, CPPM, and SBUS. Unlike the FrSky XM+, the FrSky XSR receiver does not have a dedicated RSSI pad to take analog RSSI values from. But instead you get an S.port wire which is much better as now you can get full telemetry from your Flight Controller on your FrSky radio, which is almost a must-have these days.

 

 

Power

The FrSky XSR consumes around 100mA at 5V and has an input voltage range of 4~10V. It is still recommended to use a stable 5V supply from your Flight Controller to power the FrSky XSR receiver to prevent accidental receiver reset when there is a voltage sag.

 

Footprint

The FrSky XSR weighs in at 3.8g and has a footprint dimension of 26*19.2*5mm which makes it unsuitable for most mini quads. But if you have space in your frame, this will fit just fine.

 

 

Comparison Table of FrSky XM+ & XSR

Feature

FrSky XM+

FrSky XSR

S.Bus

Yes

Yes

SmartPort

No

Yes

CPPM

No

Yes

Dimensions

21.5*12.*3.5mm

26*19.2*5mm

Weight

1.6g

3.8g

Voltage Range

3.7~10V

4~10V

Full Range

Yes

Yes

Diversity

Yes

Yes

Telemetry

No

Yes

Updatable

Yes

Yes

Un-inverted S.Bus mod

Yes

Yes

 

 

So, which should I choose between FrSky XM+ & XSR?

The answer to this depends on what size of drone you are going to use this on. Are you planning on getting the receiver for a whoop style craft or a full-blown craft?

For most whoop size quads, the FrSky XSR is a big receiver and so it is better to go for the FrSky XM+ receiver.

 

Alright, what if I want one for my 5” mini quad? If that’s the case, it is a no brainer that you should choose the FrSky XSR over the FrSky XM+ receiver because it has SmartPort capability which is almost a must-have these days so that you can get telemetry data on your transmitter radio.

 

Conclusion

We have discussed the pros & cons between the FrSky XM+ & XSR receivers and how they stack up against each other and the targetted crafts it is designed for. For cheap whoops and small crafts, the FrSky XM+ is a better option when compared with the FrSky XM+ & XSR but when it comes to larger crafts, the FrSky XSR is the obvious choice when you compare both FrSky XM+ & XSR.