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RPi4, Stellarmate and locations without internet access.

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Hi,

Very basic and simple question. I am wanting to go down to a dark site by me that will away from any internet access. So I am sure there is a basic answer ot this basic question, but I just do not know.
So, how would I get internet access on the RPI4 to make sure that the mount/rpi4 knows where it is? Do I need to buy a gps to connect to the rpi4? 
Mount: Skywatcher HEQ5 Pro | Main Scope: William Optics GT81 | Guide Scope: ZWO OAG | Imaging Camera: ZWO ASI183MM Pro | Guiding Camera: ASI120MM-Mini | Accessories: ZWO EAF, ZWO EFW 8 x 1.25", Pegasus Pocket Powerbox advance, RPi4

11 months 6 days ago #72346

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Just connect the App to StellarMate and it will automatically sync the phone/tablet GPS time/location with StellarMate.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
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11 months 6 days ago #72348

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Hmm. Okay, I guess this is where I am lost. If I connect over the hotspot from my laptop then how would I still get the internet access/gps location? I am sorry if I am making this difficult, Im just trying to understand. It seems like a source somwehere has to have connection to the internet
Mount: Skywatcher HEQ5 Pro | Main Scope: William Optics GT81 | Guide Scope: ZWO OAG | Imaging Camera: ZWO ASI183MM Pro | Guiding Camera: ASI120MM-Mini | Accessories: ZWO EAF, ZWO EFW 8 x 1.25", Pegasus Pocket Powerbox advance, RPi4

11 months 6 days ago #72349

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You can just try to connect one from the SM App on the phone/tablet, and it will update time/location, then you don't really need to use it, just close it and then you can start using your laptop.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
The following user(s) said Thank You: Daniel DeSclafani
11 months 6 days ago #72350

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Just wondering, as a lower-tech alternative, couldn't you just look it up in advance in google maps, and then enter it by hand, e.g. in the Indi Control Panel, mount tab, site management sub-tab?  I'm assuming it doesn't really need to be very exact ( xkcd.com/2170/ ).
Hy
 
AP1100 & Orion Atlas Pro, WO/ZS105 w/Moonlight V2 focus, GSO RC10 w/RSF focus
ZWO ASI1600, Astronomik Filters, ST80, QHY 5L-IIm.
KStars/Ekos/Indi on NUC10 & RPi4 w/SSD -- Ubuntu
Projects: Greedy Scheduler, Terrain, Polar Align, Analyze, Linear Focuser, SEP MultiStar & GPG Guide, FITS autostretch.
11 months 6 days ago #72354

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Yes, just create a new location in KStars before you go. I do this all the time.
Google coordinates. Don't have to be very accurate.
Max S.

RPI 4 B (4Gb) with SMate
Askar FRA400, TPO RC6, Nikon D5500 full spectrum (with IDAS clip-in filter).
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
11 months 5 days ago #72358

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As the RPi doesn't have a system clock you will need to make sure you update the time when you start up (i.e. it doesn't have a clock powered by a small battery when there is no power at all to the RPi). While I don't run StellarMate I do run my KStars on a RPi and even at home I have issues with WiFi and the RPi has issues getting a GPS fix until I get its time synced. I just use my mobile phone, set up a WiFi hotspot, and have the RPi connect to it. Once the RPi has connected I get a GPS fix within seconds with my GPS dongle. The reason for all that, having the RPi connect to the phone allows for the time to be synced.

You may not need the GPS fix to get the right location if you're just setting up a location in KStars but you will need the date and time up to date so you can point your OTA in the right direction. As Jasem says, you don't need the tethering once it has got the GPS fix similarly it doesn't need the the tethering once it has the correct date and time.
RPI 4 B (4Gb) running Manjaro ARM
Kstars/Ekos
SkyWatcher Esprit 80ED
SkyWatcher EQ6-Pro
ZWO ASI1600MM Pro
ZWO ASI290MM-Mini
ZWO EFW
PrimaLuceLab Sesto Senso 2
Pegasus UPBv2
11 months 4 days ago #72379

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Here's another low-tech solution.

You are right that without a RTC or network you'll need to set the time somehow.
A low-tech way to do that is to get the time from your phone and run a shell command similar to the following.

sudo date -s ‘06/16/2021 7:05pm’

Hy
AP1100 & Orion Atlas Pro, WO/ZS105 w/Moonlight V2 focus, GSO RC10 w/RSF focus
ZWO ASI1600, Astronomik Filters, ST80, QHY 5L-IIm.
KStars/Ekos/Indi on NUC10 & RPi4 w/SSD -- Ubuntu
Projects: Greedy Scheduler, Terrain, Polar Align, Analyze, Linear Focuser, SEP MultiStar & GPG Guide, FITS autostretch.
11 months 4 days ago #72380

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