Reach M2 and Lora Radio for position output

Reach Module / M+ / M2
1

Hello,

I would like to output the position for a Reach M2 while keeping the correction input.
I have found a topic here but it is quite old.

Maibe I can setup a serial output and build a split cable to feed the serial output to the TX of the Lora radio module ?

Thank you

Robin

3

Hi Robin,

Welcome to the forum!

Could you tell me more about your application and the workflow you’re looking for? This will help me offer more tailored suggestions.

There are also possible options to stream the position via TCP or Bluetooth. This data can be shared with third-party GIS applications or external devices.

4

Hi Inkar,

Thank you for your reply.
I am working for a company that is doing coastal and nearshore cable installation jobs.
What I am trying to do is to build a GNSS buoy to track and monitor operations (divers, floating cable, assisting vessels … ), from a distant vessel.
Due to the distance to the monitoring station (up to 300 - 400 m) I don’t think wifi or bluetooth is an option.

I am trying to assess if the following is achievable with the Lora radio module :

  • Stream out NMEA string or alternatively LLH (Tx)
  • Receive RTCM corrections (Rx)
  • On the monitoring end, be able to receive position and output RTCM to multiple buoys (position stream from buoys would have to contain some kind of id).

Thanks

5

That’s quite an interesting setup! If I’ve got it right, your base will be located onshore, the M2 will be mounted on a buoy, and you’ll be on a vessel some distance away. Am I correct?

You’re right about the TX pin being used for NMEA output and the RX pin for corrections. The S1 port can handle Correction input and Position output, but using it will require a custom cable. Please note that the potential for delay increases with cable length. Even as small as 1ms can lead to inaccuracies in positioning data, so it’s better to keep the cable as short as practical.

To minimize these issues, I’d suggest going with a Wi-Fi solution. Two separate portable Wi-Fi routers might work: place one at the base station and the other near the M2.