Hi, I am struggling with doing a Survey in on the Postcard. Here are the details:
its running firmware v2.1
I configured it and toggled it to Survey-in mode. (note the bluetooth connection is flaky and I ended up using the USB connection.
Then I exited the menu and it went into survey in mode. It kept saying the accuracy was 0.
I then went back in and toggled the base mode from survey-in to Fixed. Exited the menu, and then went back in and toggled the survey in mode again.
After this, it did do a survey in where I saw accuracy numbers. After a bit it got down to under 2m (I am doing this inside with my antenna at a window). It then started the survey in and ran for about 75sec with accuracy ranging from 1.3m to 7m. The whole time it says that SIV:0.
At the end it says that the Survey in was successful and then automatically goes into base mode with SIV:0.
I can’t find where the ECEF coordinates are to enter them back into the fixed location.
I am also trying to communicate to the rover via directly connecting the LoRa serial kit to the Postcards. I think its working but not entirely sure. I need to get the survey in working first.
In reading the documentation, it seems like I should likely upgrade the Postcard firmware to V2.2 or 2.3? There is also firmware upgrades for the GPS modules on GitHub, not sure if there is an advantage to that?
Anyone used these Postcards and got them to work for a Base & Rover setup? Communicating via LoRa serial modems?
Tried the same tests with everything outside. Here are my results:
- Survey in went way faster - very quickly got to below 2m accuracy and started the Survey-in. SIV still recording 0.
- Interestingly, the minimum accuracy shown was 1.3m. Most of the numbers were 1.3m. Seems like this might not be a real number (like it recording SIV:0)
- I then started up the rover. It connected via the LoRa no issues.
- The rover started in a DGPS Fix state
- After a little while it went to RTK Float state - accuracy bouncing around from a min of .4m to .8m with some bounces to 3m (just for one recording)
- It never did get to RTK Fix state (the accuracy numbers seemed legit so not surprising).
So, it seems better and if I update the firmware on the Postcard (to v2.2 or 2.3) it would seem like I can get the ECEF values from the survey in.
Any other comments? Would their be value in updating the LG290P firmware?
We are working on a new Base Assist, where the coordinates from survey-in are copied across into Fixed Base and are then accessible from the Base menu. It is available in the Release Candidate firmware we released just before Christmas, but has not yet made it into a full release. Please be aware that that Release Candidate has other issues and so may not be a good starting point for you. You may want to wait for the full release of 3.0.
“Soon”! But we always say that, and then the release takes longer than anticipated…
If you want to give the Release Candidate a try, you certainly can. Please see this link and make sure you have “Allow Beta Firmware” enabled. But please be aware that that release do have issues and the message rates, constellations and Galileo HAS setting will all reset to their default on each power cycle. You can always revert to 2.3 if needed, once you know your fixed coordinates.
