LC29H(XX) GPS/RTK HAT

Sascha

Sascha

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I just found this interesting HAT for the Raspberry Pi.
If I read it correctly, you can use it as an RTK base station.
There is also the LC29HDA, which you should be able to use in the Mower.
At that price, I could well imagine testing it.


Anyone interested in sacrificing themselves :-)
 
Wenn ich das richtig verstanden habe, dann gibt es von dem LC29 (XX) verschiedene Ausführungen, wo die günstigen dann nicht RTK fähig sind.
Aber so toll scheint der nicht zu sein, wie ich im AutoSteering Forum gelesen habe. Der UM980 soll besser sein, spielt dann aber auch wieder in einer anderen Preisliga, wie das simpleRTK.
 
Hey everyone!

I was browsing AliExpress and found a cheap RTK module that does what it needs to. Its model is LC29HEA, 10Hz, and it costs only $65. Based on my online research, it really delivers what it promises.


LC29HEA 10Hz
 
Ich habe einen zum Testen bestellt. Bei 10 Hz ist er sehr instabil, bei 7 Hz ist er schon voll einsatzfähig, aber bei 5 Hz hat er sofort den RTK-Fix. Ein Feldtest fehlt noch, aber der steht noch aus, da ich noch nicht weiß, aus welchen Komponenten der Mäher bestehen soll.
 
adamant said:
Ich habe einen zum Testen bestellt. Bei 10 Hz ist er sehr instabil, bei 7 Hz ist er schon voll einsatzfähig, aber bei 5 Hz hat er sofort den RTK-Fix. Ein Feldtest fehlt noch, aber der steht noch aus, da ich noch nicht weiß, aus welchen Komponenten der Mäher bestehen soll.
Click to expand...
I don't understand your config :
Did you receive antenna in the order and what is the exact price with antenna ?
How did you receive RTK correction ?
Do you use 2 modules or NTRIP ?
etc...
 
Bernard said:
I don't understand your config :
Did you receive antenna in the order and what is the exact price with antenna ?
How did you receive RTK correction ?
Do you use 2 modules or NTRIP ?
etc...
Click to expand...

Hi,

The antenna and the LV29HEA GPS cost a total of $65. I tested it with NTRIP since I only bought one module for testing. For NTRIP, I used the Centipede service. At 10Hz, I couldn't achieve an RTK-Fix, but at 7Hz, I managed to get an RTX-Fix. However, when moving, it sometimes switched to RTK-Float. At 5Hz, it immediately started with an RTK-Fix and remained stable while moving.

The stock firmware doesn't handle RTK well, so I updated it to the latest version, which I found on a forum. After the update, it worked properly. The default baud rate is 460800, and I still need to set it to 115200, but I haven't figured out how yet. I know it has to be done via a command, but I still need to find the exact command.

I'm also not sure yet whether the mower requires RTCM3 MSM7 messages or if RTCM3 MSM4 is sufficient.
 
OK.
NTRIP come from internet over WIFI, but how did you transmit RTCM3 message to LC29H , Did you simply test on your PC over USB ??

The most important is to check if it can work under a big Tree or near (<1m) a wall ,it's the main issue in the robot mower.
 
Hi.

I only connected it with a laptop and a USB cable in the garden, under the half-roof, where the roof partially shaded the GPS antenna. The program I use is the factory Qgnss v1.10—there is a newer version, but it doesn’t allow proper configuration of the GPS.

Here’s a picture (not mine, since I’m not at home right now), but I’ll take my own photo over the weekend.

Let me know if you have any requests or questions because I’ll test it over the weekend, and if needed, I’ll share my experience with you.
 

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Ok now i understand.
So need further test in the garden and try to find a way to use NTRIP without laptop, maybe using ESP32.
 
Bernard said:
Ok now i understand.
So need further test in the garden and try to find a way to use NTRIP without laptop, maybe using ESP32.
Click to expand...
Yes, that's what I wanted as well I would like to test it with an ESP32, but I haven't found the right firmware yet. Could you possibly recommend something?
 
adamant said:
Yes, that's what I wanted as well I would like to test it with an ESP32, but I haven't found the right firmware yet. Could you possibly recommend something?
Click to expand...
I never investigate this , but certainly this video help (Not for your module unfortunatly)
 
Yes, I tried to make these videos, I installed the fw, but as soon as I set it to connect to the network, I can't see it on the network anymore... I've been trying for 3 hours...
 
adamant said:
Yes, that's what I wanted as well I would like to test it with an ESP32, but I haven't found the right firmware yet. Could you possibly recommend some
Click to expand...
If I understood your project correctly, you don’t need ESP32 as NTRIP client, just use raspberry pi for that, it pretty much the same as my Landroid build. Raspberry pi is used for sunray, Cassandra, ntrip etc, everything inside the mower
 
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