Working with two reach M+ devices with LoRa Radio

Reach Module / M+ / M2 Getting started
1

Hi Emlid,
At the moment I am working in Germany (Palatinate) with:

  1. One reach M+ device incl. Talysman Antenna (on Rover)
  2. Samsung Galaxy S5 (on Rover)
  3. Free RTK-Correction-Data from local SAPOS (Germany)
    Everything is working perfectly. I walk in straight lines
    with 1m-distances from point to point. (archaeological prospection)

I am planning to work abroad (Spain, Portugal, Tunisia) next year
and will not have any RTK-Correction-Data there.

My plan is to buy:

  1. a second reach M+ incl. Talysman Antenna incl. LoRa Radio Antenna (as Base)
  2. an aditional LoRa Radio Antenna for my actual M+ device (on Rover)
    I will set up the base on a tripod in Averaged Single standalone mode without
    additional corrections.
    I will not have high absolute accuracy, but the relative measurements between base and
    rover will be highly presice, which is all I need.

Will this work or do I need RS+ / RS2 for this?

2

The rs2 will not do you any good with the M+ because it just L1. Wait to get the M2 then you can use it as a rover or on a drone if you come up with the right rig. Otherwise depending on your needs you can just get the RS+.

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3

Hi Michael,
Thank you for the quick answer…

  1. I understood that I can not use the RS2 because it is multiband…OK!
  2. I also understood that I should get the M2 for rover.
  3. But the question remains why I can not use two M+ devices: one for base and one for rover.
4

You CAN use it, just will just have no benefit from the multifrequency of the RS2.

You can.

5

Yes you can use the RS2, but you lose the benefit of the dual. You can also run two M+, but you will not get the same range or performance in adverse scenarios. I have one of my M+ setup for drone and rover use and it was not as stable as an RS+ Rover and two M+ was is even worse. There are things that can be done to make them better, but I didn’t want to buy and more equipment.

6

Hi Michael, hi Christian,
Thanks for this information.
So I will go for the solution using two M+ devices…
Another question is the connection between base and rover:
Do I really need LoRa or can I connect with wifi or bluetooth?
The maximum distance between rover and base will be maximum 200 meter.

7

For 200 meters, LoRa is the way to go. Bluetooth without an external antenna doesn’t go beyond 4-5 meters, and wifi not beyond 20 meters

8

Thanks again Christian,
So now we have the solution!
I wil go for LoRa!
Best wishes
Uli

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9

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