I'm not sure what you mean by that. I'm fairly sure this isn't a hardware issue since my PC (Windows) and my iPad (iOS) can both connect to the astroberry VAP. But neither of my Android devices can even though they have never had a problem connecting to any other Wi-Fi network (and there have been dozens of them). That smacks of a software or configuration issue with the astroberry implementation. I just don't know where to even begin looking.
The way WiFi and BT work on Raspberry Pi is dependent on the chipset that Raspberry Foundation has chosen and firmware they provide with Raspbian system. There can be bugs in either of these components, including drop of WiFi transfer rates if you use 4K resolution over HDMI.
What you can do is to play with configuration of the Astroberry Hot Spot so maybe you can find the way your android devices connect with the hot spot (BTW, I use google pixel with vanilla android system and have no issues with connecting to it).
Righ-click WiFi icon on your top taskbar and select Edit Connections, then double-click Astroberry Hot Spot - you can play with settings on Wi-Fi (band, channel) and/or Wi-Fi Security tabs. Note that you should make changes while connected to screen and keyboard. Otherwise you can loose you connection.
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Thanks for the advice. Interestingly, after disabling security it connects immediately. But if I enable any type of security (WEP or WPA), it fails to connect. I suppose I could run with it open but I'm not very comfortable with that since I plan to start using an astronomy site that will have a lot of other people nearby who are also going to be using telescopes and astrophotography rigs - it wouldn't be very good if someone connected (either accidentally or on purpose) and messed with my RPI.
So the problem is definitely related to Wi-Fi security and Android, I just don't know how to sort that out.
I run into the same problem. I cannot join the WiFi from my Samsung Note 8. My windows PC and an old Asus Android tablet can connect, but that Asus tablet have such an old Android version that I cannot install Kstars Lite on it.
Agreed, but I wouldn't go so far as to say that it's a Samsung issue since all of my Samsung devices (and I have several of them) have no problem connecting to any other Wi-Fi access point - just the Astroberry software.
I just don't know how to build a new Astroberry image with the v2.9 supplicant. It's odd that the folks who manage Astroberry haven't done this already. Samsung devices are very popular and the Wi-Fi hotspot needs to work with those devices.
Astroberry depends on the Raspbian Buster Linux distribution and it is that distribution that determines the versions of the software available on it. It is far from easy to update any core software on a distribution since there are a LOT of dependencies that need to be satisfied.
Note that connecting with a mobile phone to the wifi of a Raspberry Pi is not a very common thing to do so from that persopective it makes sense that this latest version isn't available in Raspbian yet.
Wouter van Reeven
ASI6200MM and 7 slot 2" filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro
ASI1600MM-Pro Cooled and 5 slot 1.25" filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
That's why I've said that no easy solution.
Note, that Astroberry is just a package over the Raspbian distribution, and wpa supplicant is part of Raspbian, not Astroberry.
The best we can hope that Raspbian will be upgraded soon.