I have an Intuicom RTK bridge. Works great (older model, no wifi hotspot). It can connect to an NTRIP caster and rebroadcast the RTK corrections on a local radio link.
What I would really like to have is a small rugged device that would hook up to a base receiver, and accept the RTCM or CMR corrections out of the serial port of the receiver, and serve them up as NTRIP. Sort of like an NTRIP caster/server in a box. It would have to be 12V powered, ruggedized.
Does this exist?
I have been fooling around trying to get corrections (RTCM) out of an R7 and transmit them over my internal network to my desktop running SNIP ( https://www.use-snip.com/ ), but so far I can't get it to work. I connect the serial output of the receiver to a serial-to-wifi box, and I can see the data on the network using a com program which connects to the box. I figure if I can get this working the next step would be take it outside and replace the serial to wifi box with a cell modem that has a serial input. But I haven't been able to configure SNIP properly to get it to work.
Gavin: isn't a cell modem like a http://www.usr.com/products/cellular-m2m-modems-gateways/courier-m2m-3g-gsm-intelligent-cellular-gateway/ exactly that (serial to IP device server)? Or is another device needed?
But that doesn't have the ntrip funtionality built in.
I would be willing to buy your device if it does what I need.
What RTK bridge do you have? You can probably get it done with your current bridge depending on the version and firmware.
This is very common
The r7 does not have any kind of server software nor a built in cell modem as does a net-rs or an r10. The current bridge I have does have the capability of being connected to a receiver and functioning as a radio only. Not sure about the functionality on the newer modrls
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John -
We use a piece of software called Trimble Streaming Manager to do something similar to what you're describing. If the R7 is on your internal network you can stream the corrections out to a port that can be accessed by multiple users. I'm not using it as an NTRIP caster; I'm just streaming CMR+ straight out, so anyone with the IP address and port would be able to tap into it.
I know a guy at NEI who might be willing to help you out with this.
John I have a Bridge-X, about a year old and it does what I think you are asking? I can set it up on my own base and output corrections to an IP address, so once setup, it is accessed just like any other RTN over the internet. Is that what you are looking to do?
SHG
Yes, that is it I believe. My older intuicom bridge does not have that capability (new ones are $$$$ and they will give me very little on a trade-in).
I am starting to figure out how to do it with just a cell modem, too bad there is not a step-by-step. I was thinking I need an NTRIP caster in between, now I am pretty sure I can just do a CMR connection straight through. I am going to get it working internally first, then from outside to inside my network, and finally outside to outside. I just called someone who has a cell modem I can borrow, I will do that to make sure it works the way I want before buying. My wife just went to see her mother, so that gives me free time in the evening to mess around with it.
John Hamilton, post: 393872, member: 640 wrote: Yes, that is it I believe. My older intuicom bridge does not have that capability (new ones are $$$$ and they will give me very little on a trade-in).
Got that right, kind f bummed with a ONE year old Bridge that I get $500 credit for upgrade to the new 4GLTE model, a lot of money to throw away!
SHG
gschrock, post: 394226, member: 556 wrote: Hi John, sorry for the delayed response... little office time lately to look up the devices...
Below are 3 types of devices that have been used to connect legacy (non-IP-enabled) receivers to the inter-webs for IP access by rovers.
The one on the left is the device server route (though a bit obsolete as newer modems also have the same capability) -does serial-to-IP and then connect Ethernet to a modem. Cheap, but you need a modem. There are some device servers that are WiFi capable so you can use a hotspot. No NTRIP, but you can set it up with a static IP (or dyndns, or "no-IP") and the rover can hit the static IP and port directly (no authentication though). The device server can be set up to do a range of ports on the static IP for multiple rovers.
The one on the right makes the first one moot as the industrial modems have serial ports and can be set up to port forward multiple ports to serve multiple rovers. Static IP or dyndns or "no-IP". Have had the best experience with the RV50, GX440 or GX400 (avoid the LS300 unless you will always be in optimal cell coverage).
The middle one is that oddball device I mentioned, the Smalltrip. It was originally designed as a small RTK-bridge for agriculture. Simple CDMA modem but with a small board to handle the NTRIP client. Originally designed to get corrections from a caster to legacy rovers (that lacked IP capabilities) some folks used them in reverse to connect bases to casters. Had not tried it in that manner but you are welcome to it if you;d like to experiment. The CDMA modem would need to be activated. I think they stopped making them as most new gear have IP/NTRIP features built in.
A modem standalone will not accommodate NTRIP (folks have added small boards externally like Raspberry Pi's to put in a client, I do believe that most modems have Linux OS and it might be possible to flash an NTRIP server to it... never had time to try that...
Thanks very much for all the great info, Gavin. I am going to borrow a modem (not sure what kind it is) and try to go that route. Seems the most straightforward. Once I get all of this working I will post a how-to so that anyone else who wants to do this will be able to hopefully do it without too much trouble. Ideally of course I would get a new receiver with NTRIP built in, but I have a perfectly good R7 that could do this well. But, I don't want to put a PC at the base end, although I have old laptops sitting around that would probably work just fine that is more power required, more space, etc.
Actually, I have a couple of devices that convert serial to IP. One is serial to wifi, the others are serial to ethernet, one is standalone and the other is a pair, one needed at each end, that would probably only work internally.
