Facet & SW Maps no longer working with NTrip

Thank you very much!!! This is excellent news.

Jeff

Thank you for making such an awesome program and for choosing to make it available for free!

Thanks for working on this in iOS. I know APPLE doesn’t necessarily make things easy.

Some of us just have too much of an iOS investment. Great app.

V1.2.1 appears to have been released 1 hour ago.

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I’ve thought about this myself. Can get some cheap Android tablets and couldn’t you wifi to your iPhone hotspot? I don’t think you’d need a cellular android device.

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Correct RTOP confirmed that he used a Wifi only Android tablet and connected to iPhone over wifi HOTSPOT.

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This has been my suggestion for the last few years, tablets are very reasonably priced these days :slight_smile:

I bought a cheap ($89) Android tablet off Amazon. I’m able to see the RTK Surveyor on Bluetooth LE as it was configured when I used my iPhone.

Problem is that it will only connect for a few seconds before Android pops its ugly head up asking if I want to pair it which ends up killing the Bluetooth LE. The device was never in the Bluetooth list and so I can’t tell Android to not ask. Have done a lot of poking around, but so far have not been able to keep my RTK Surveyor connection alive because Android keeps trying to pair it rather than use Bluetooth LE indefinitely. Any suggestions on how to trip Android Bluetooth so it doesn’t get involved?

You can disable BT on the tablet and use its wifi to talk to the iphone, which is using BLE to talk to the facet

You also might be able to just use wifi and connect both to the iphone

You also might be able to add the facet to the BT devices and tell it to not ask with it being saved?

All depends on the available settings :-/

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Think I mixed in with the Facet discussion. I have an RTK Surveyor which I understand only uses Bluetooth LE and I have it set up like that. I had it working “fine” with my iPhone except that SW Maps on the iPhone does not handle a mix of WSG84 and an NTRIP caster that’s doing NAD83. Supposedly, SW Maps on Android will let you mix and match and will do the transforms. With the casters near me, within 50 miles, they all seem to be doing NAD83. So was trying to get an Android tablet hooking up to the RTK Surveyor on Bluetooth LE so I could use SW Maps on Android to transform NAD83 NTRIP to WGS84 and hopefully be able to see my Surveyor actually match up to a WGS84 map, like Google Maps. The only thing I was going to use my iPhone for in this setup was to provide a wifi hotspot for the Android tablet to get to NTRIP caster. How are other people solving this mismatch if they are iPhone only?

I use SW Maps on an iPhone with NAD83 CORS over NTRIP.
What problems do you have ?
[Edit] Nevermind… mixing up all my combinations.
You are correct of course, get ~1m shift since we cant transform in the iOS Version.

Try this:
You will Bluetooth the Android Tablet to the RTK Surveyor.
You will connect the Android Tablet to the iPhone Personal Hotspot (WiFi).
Turn off Bluetooth on your iPhone to make sure it’s not getting in the way.

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Yah, that’s how I’m doing it with the exception of turning off Bluetooth on the iPhone. Also, I’m making the distinction between Bluetooth and Bluetooth LE. LE is what RTK Surveyor uses and you can’t, at least that I’m aware of, connect to Surveyor via straight Bluetooth.

Surveyor does use Bluetooth serial port profile (SPP).

I just pulled out a RTK Surveyor, paired it on an Android Table (SPP), then connected to the Surveyor in SW Maps on the Android tablet… just to confirm.

[Edit] also connected the Android tablet to iPhone Hotspot, no issues with NTRIP.

You will need to change the BlueTooth mode to Classic.


Menu: System

Bluetooth (4B2A): Online
System Uptime: 0 00:02:33.934 (Resets: 0)
e) Echo User Input: On
d) Configure Debug
z) Set time zone offset: 00:00:00
b) Set Bluetooth Mode: Classic
r) Reset all settings to default
B) Switch to Base mode
R) Switch to Rover mode
W) Switch to WiFi Config mode
S) Shut down
x) Exit
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Oh, that’s great! Maybe it was the iPhone->Surveyor that had to be Bluetooth LE and I just kept it in that mode. I’ll switch it back to Bluetooth: Classic. I would guess that will solve my problem since Android is so sticky on Bluetooth.

Thanks for the help!

That is correct :slight_smile:
The Surveyor is an Either/Or deal with the 2 bluetooth modes.

Glad to help, it reminded me to recharge the batteries… and I went ahead and updated the firmware.

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Fieldgenius on windows and surpad have been great for me and stack against say Trimble access in getting me what I need. I set a baseline on RTN last weekend with facet 3 minute observations and it checked 0.02 for 500 foot baseline. Not bad to get your trav started on SPC.

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Making progress w/ Android tablet. Got the Surveyor switched over to Bluetooth classic and the Android hooked up to Surveyor, no problem now and holds the connection.

I pull an NTRIP stream from the CRTN network for station P199 which is closest to me. As near as I can tell, this is a NAD83 correction stream.

In my version of SW Maps for Android, it looks like the only place to try to merge or transform from a Google Sat Map (WGS84) and an NTRIP NAD83 stream is in the “Project settings”->“Coordinate System”. I didn’t see a selection on the list for NAD83, but did see the EPSG Code field and investigated that.

I understand that the EPSG Code for NAD83 in northern CA, where I am, is 26942 or 2226. If I select either of those, SW Maps accepts it and does show “NAD83/California zone 2” in the Coordinate System description. So it obviously found what I was looking for. I thought I was homing in on it.

When I connect to surveyor and pulling the CRTN network NTRIP for P199, I still appear to be the 1.2’ish meters off of a known point on Google Map (middle of a handicap parking symbol on the ground) for a background map.

It appears no transform is being done.

To summarize:

  • Android tablet → iPhone wifi hotspot
  • SW Maps Layers Background map → Google Satellite
  • Project Settings->Coordinate System->EPSG Code: 2226 = NAD83 / California zone 2
  • GNSS Connection → RTK Surveyor in Bluetooth Classic mode
  • NTRIP Client → CRTN-P199. or rtk2go → ojjo (same result)
  • Never get to Green/RTK Fix with 30/39 used/view. Only shows “Single”.

Anything else you can think of that I should configure to deal with the NAD83 NTRIP offset on a Surveyor and SW Maps? It feels like I should be close, but not quite there…

First you need a RTK fix. Let’s figure that out.

But be aware that Google Maps won’t be the source of truth.

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Having the same issue with NTRIP. Using SW MAPS vs. 1.2.2. I am working in Italy and NTRIP keeps disconnecting and reconnecting.