Wireless link between F9P moving base and rover

GPS/GNSS Development Boards
1

My project involves finding an accurate relative heading at 5Hz between a moving base and rover at a range of <100m. Using U center and Ublox’s Application Notes I have achieved an RTK fix with cm level relative accuracy using a wired connection. My next step is to establish a wireless link to send RTCM messages from the moving base to the rover.

Your RTK2 Hookup Guide recommends the Bluetooth Mate. I note page 12 of Ublox’s Moving Base Application Note recommends a baud rate of 460800 for navigation rates above 1Hz. Will the Mate be able to send the required set of RTCM messages at 5Hz?

I scanned your RTK2 Hookup Guide and other forums for advice to configure a pair of transceivers, i.e. using a pair of Mates or say ESP8266’s. I was unable to find details to configure a pair of Mates for a moving base setup. Since this should be fairly common, could you perhaps augment your current Hookup Guide, or point me to some beginner level instructions elsewhere?

2

Hi Ric.

The hookup guide doesn’t mention anything about a wireless link since that’s a very complex thing all on it’s own. The fastest you’re going to be able to get a Bluetooth Mate to go is 240Kbps and that’s about 1/2 the speed you’re looking for. If you’re able to somehow compress the data, send it, then decompress the data on the other end of the link you might start getting closer to the data rate you’re looking for but things get complex with the hardware needed to do all that. WiFi might be an option as that has better data rates, but you might have range issues.

As speed and or distance goes up, things get harder to do and start costing a lot more and unfortunately we don’t carry anything that does the speed you’re looking for. Something like a [pair of these might work for you but there are probably more cost effective solutions out there.](http://www.arwestcom.com/products/high-speed-radio/high-speed-radio)