Can anyone spot what id wrong here. I’ve attached 2 screenshots, one of the BS and one of the DA. Both antennas are on the roof. The TX of the BS is wired to the RX of the BS. I have probed the RX pad on the DA so I know the correction data is getting there.
I never get anything better that a differential fix.
Could it be that the antenna aren’t dual band?
On BS side fix base ecef and disable pqtmsvinstatus… $PQTMCFGMSGRATE,W,PQTMSVINSTATUS,0,1*59
Problem solved!
For anyone trying to get RTK to work by connecting a wire from the TX of a Waveshare BS HAT to the RX od a Wareshare DA HAT, you need to remove R13 and R14 on the back of the boards to disable the LEDs.
Hello Benh119,
I am also trying to get RTK mode between this two modules and a wire. Both are with last firmware, R13 and R14 are removed from back of the boards (RX and TX leds are off).
It looks that Base station is transmitting the same massages like yours.
Both jumpers on BS are on position B. On DA module receive jumper is on position B (read data from UART), transmit jumper is on position A (send data over USB). The wire is no more than 20cm long. Both modules are powered from USB ports of laptop (I also put wire between both GND pins).
So far what I get on the DA module is GPS SPS Mode and sometimes DGNSS Mode, Sky is with clear view.
I dont know what I am doing wrong.
Any suggestion is welcome.
Thanks!
Imho TX on BS side for send rtcm_corrections
and
RX on DA side for receive, then U can read GGA on TX of DA_board or usb…
P.S
quote @ for advert
@benh119
Hello,
Yesterday I was going to reset both boards and to start everything from the beginning, but I powered them and everything is working. I have RTK fixed 
!
Maybe the problem was bad connection of the wire between both modules. Just to mention both resistors are removed as Benh said.
Schematic is correct (picture on my previous post )!!!
Thanks everyone!!!
problem solved!
I just started working with this board and as a Raspberry PI hat. I get the RTCM records from a base via Wifi and forward them to the board through port serial0 and still no luck. I get NEMA data out but the RTCM3 I am sending does not seem to matter as I never get an RTK fix. I do not know where R13 and 14are is there a picture showing their location?
Resource → document → schematic
