ASIAir Pro and WiFi range question

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Jens Mascher avatar
Hello friends on the Sky!

I have (as many maybe of you) a problem with the WiFi range on my ASIAir Pro controller. Although I operate the controller in station mode, the WiFi contact frequently breaks off.
I have a stable, high-level WiFi network at my location. The cause must be therefore the poor WiFi output performance of the controller.
Has anyone ever tried to control an external WiFi antenna via USB? Is that possible? I have also found forum threads in which the tuning of a Raspi 3 with an external WiFi socket is described.
I don't know if that works with Model 4. Can the operating system (Raspberian or Linux?) control such external adapters in the background or is that excluded from ZWO?
If anyone has an idea, please let me (us) know! Thank you very much for your support and ideas!

Clear Skies!

Jens
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Doug Summers avatar
If you are using 2.4Ghz wifi and trying to use USB3, HDMI, or bluetooth from the ASIAIR (which is basically a Rpi), then you are likely running into RF interference due to close proximity of the Wifi antenna to those other ports in that small HW form factor.  I experienced this problem and documented it in the Kstars/Ekos forum (for Rpi4 users), but it was documented many years prior in a white paper:

www.intel.com/content/www/us/en/products...erference-paper.html

There are several options discussed in the kstars/ekos post which might apply to mitigate, namely using 5Ghz in place of 2Ghz (but there are other options).   Here's the post: 

https://indilib.org/forum/general/6576-pi4-usb3-and-wireless-2-4ghz-interference.html#50509
I hope one of these options helps....   CS,   Doug
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wsg avatar
Jen's. The wifi of the asiAir pro is  8 feet in my experience due to the metal construction of the box and lack of external antenna and one must be pretty much in line of sight to the box within that 8 feet.  Zwo knows this and as far as anyone can tell has no plan to make it better.  They have, it seems designed the pro primarily for IOS systems like the iphone or iPad.  They recommend running an Ethernet cable to a wifi repeater or booster closer too your computer location from the Pro.  I have had great success with this option and it works perfectly especially using the asiAir pro wifi as a stand alone system separate from you local wifi.  I use the 5G option from the asiAir pro.

scott
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Olaf Fritsche avatar
I am using a mobile WLAN repeater. It catches the signal of the ASIair Pro and sends a stronger signal to my iPad inside the house. Works great … 

Until yesterday, when I added a USB 3 hub to my rig. Since then I have trouble connecting to the ASIair. I will try Doug's advice and switch to 5 GHz. 

… Just tested 5 GHz. Works fine. smile
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Jens Mascher avatar
Good morning!

@Doug:
I will study this thread, maybe I can find any solution for that problem, many thanks for your information!

@wsg:
okay, 8 feet is not really long… :-/. If I would be the producer of such a device, using the "Air" word in the device name, I would be interested in the users can use the WiFi normally. It´s senseless for me to get a wireless controller and plug him to a wired connection??? I use this device in my garden, distance to the next WiFi repeater (FritzRepeater 1200) is about 6-7 meters. The nearest possible location for another repeater would be an Apple tree! Now, maybe I habe to use a long power cord over the greens, nice :-/

@Olaf:
Seltsamerweise konnte ich bisher die 5GHz Frequenz im Station-Mode nicht nutzen, ich will es aber jeute nochmal probieren. Ich hatte die Air ja mal gekauft um Kabelsalat zu vermeiden, jetzt geht das von vorne los, etwas ärgerlich…
Olaf Fritsche avatar
Mit dem TP-Link TL-WR902AC AC750 WLAN Nano Router an der gleichen Stromquelle und direkt neben dem ASInonair wird daraus ein ASIair, der den Namen verdient. Ist nur eine Behelfslösung, aber funktioniert. 

With the TP-Link TL-WR902AC AC750 WLAN Nano Router on the same power source and right next to the ASInonair, it becomes an ASIair worthy of the name. It's only a workaround, but it works.
Jens Mascher avatar
Olaf Fritsche:
Mit dem TP-Link TL-WR902AC AC750 WLAN Nano Router an der gleichen Stromquelle und direkt neben dem ASInonair wird daraus ein ASIair, der den Namen verdient. Ist nur eine Behelfslösung, aber funktioniert. 

With the TP-Link TL-WR902AC AC750 WLAN Nano Router on the same power source and right next to the ASInonair, it becomes an ASIair worthy of the name. It's only a workaround, but it works.

Also wie gesagt Olaf, an WLAN mangelt es nicht, ich betreibe eine WLAN-Brücke über 570m vom Haus zum Garten (450MBit), als AP dient eine Fritzbox 7590 und der 1200er dran. Noch mehr Power bringt nichts, da die Sende- und Empfangsleistung der Air ja nicht ausreichet. Ich werde wohl wieder um den Repeater eine Plastiktüte stülpen und das Teil in den Apfelbaum hängen...
FiZzZ avatar
I have just wired a tp-link extender to the AAP and now I can connect to it from everywhere.
It doesn’t bother me very much not being able to access to internet while I’m imaging, as mainly I’m concentrated on the session… or I’m sleeping smile
However is always possible to connect from multiple devices, so for example I use the MacBook (with Bluestacks) to exploit the big screen (focusing, preview, general control) but then I switch to the iPad portability to rotate the camera or to polar align.

is still unclear to me if the ongoing session is stopped if the connection is lost (I think yes)
Olaf Fritsche avatar
Jens Mascher:
Olaf Fritsche:
Mit dem TP-Link TL-WR902AC AC750 WLAN Nano Router an der gleichen Stromquelle und direkt neben dem ASInonair wird daraus ein ASIair, der den Namen verdient. Ist nur eine Behelfslösung, aber funktioniert. 

With the TP-Link TL-WR902AC AC750 WLAN Nano Router on the same power source and right next to the ASInonair, it becomes an ASIair worthy of the name. It's only a workaround, but it works.

Also wie gesagt Olaf, an WLAN mangelt es nicht, ich betreibe eine WLAN-Brücke über 570m vom Haus zum Garten (450MBit), als AP dient eine Fritzbox 7590 und der 1200er dran. Noch mehr Power bringt nichts, da die Sende- und Empfangsleistung der Air ja nicht ausreichet. Ich werde wohl wieder um den Repeater eine Plastiktüte stülpen und das Teil in den Apfelbaum hängen...

Wow! In deinen Garten passt der halbe Ort, in dem ich wohne.  
Ich würde es dann auch mit dem Apfelbaum versuchen. Viel Erfolg!
Jens Mascher avatar
Nö, sind ja nur 570m Entfernung ;-)
Ich habe den 1200 sehr gut verpackt im Apfelbaum versteckt. Das scheint auch besser zu funktionieren. Wettertechnisch wurde alles auch schon 3x heute durch Gewitterschauer geprüft, alles dicht! Wenigstens das ist positiv.

Hier ein Bild mit der ASI183MM Pro von heute vormittag. Single Shot mit 400µs Belichtungszeit

Jens Mascher avatar
@FiZzZ:

I planned a small garden observatory, then I will be able to lay some cables under the lawn.
Olaf Fritsche avatar
is still unclear to me if the ongoing session is stopped if the connection is lost (I think yes)

I am pretty sure that ASIair Pro keeps on working. You can even shut down your devices, the little computer in the ASI will do what you told him. The connection is only necessary for giving instructions and looking at the pictures, not for taking pictures.
Joe Santacroce avatar
Olaf Fritsche:
is still unclear to me if the ongoing session is stopped if the connection is lost (I think yes)

I am pretty sure that ASIair Pro keeps on working. You can even shut down your devices, the little computer in the ASI will do what you told him. The connection is only necessary for giving instructions and looking at the pictures, not for taking pictures.

It certainly does keep going. I also run it from my phone when outside then pick it up on my iPad indoors or even my laptop with bluestacks (emulator but not supported by zwo). 

I tried a number of wifi solutions over the last year and had mixed results then gave up. I image from different parts of my driveway within 75 feet of the garage in either direction so I put a wired router in the garage as a repeater for wifi and a 100’ Ethernet cable on a spooler so I just run it out to my scope. That along with using a good usb 3.x stick for imaging and preview images load in a few seconds when in the house. 

I have done remote with a Vonets bridge repeater and it works but spoiled by the cable.
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Götz Golla avatar
Hello Jens et al.,

if you have a long distance between your ASIAIR and your (wired) home network, and you have large bandwidth requirements, maybe because you want to transfer your images directly to your desktop PC while observing without utilizing a USB stick, there is another solution.

Mikrotik (and others) offer wireless point-to-point solutions with the 60GHz standard. They call it Wireless Wire NRay. This is not WLAN ! It has the advantage that it offers true 1GBit/sec throughput over a distance of up to 1.5km. You need to use a short ethernet cable from your ASIAIR to the one Wireless Wire NRay. The other Wireless Wire NRay needs to be mounted close to the house and needs to be attached to another ethernet cable connected to your home network.  The routers are made for outdoor use, so you dont need to wory about that and can install them permanently outside.
This of course is suitable only for specific scenarios, but it is lightning fast and very stable when you want to control your ASIAIR/telescope from within the house.

For initial setup, polar alignment etc. I still use the ASIAIR build-in WLAN with my mobile, which is OK since for PA you need to be close to the telescope anyway.

Regards,

Götz

P.S.: I should mention that with the ASIAIR and a 60GHz wireless router the bandwidth is limited by the ethernet hardware of the Rasberry 4 used for the ASIAIR. I get about 650MBit/sec transfer rate. 

I should also mention: There are also outdoor long distance WLAN solutions mentioned already in this thread. However, these to my knowledge only have 100MBit/sec ethernet adapaters, which means that the bandwith is limited to that rate.
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Jens Mascher avatar
Dear Götz!

Meanwhile I have build a PtP 5GHz WiFi bridge, using 2x Ubiquiti LiteBeam 5AC LR. It works, even it is weather sensitive. I cannot use 60GHz because I have not completely free path (one edge of a building and nearby some trees. I think 60GHz would be dirsturbed too much. I optimal situations, now I can connect with a capacity more than 400 MBit/s. The ASIAir Pro is wired to another FritzBox in my garden. I think if me small observatory is finished, it will contain direct linked Ethernet to thos AP. Then also a completely remote control is possible ;-)

Thanks!

Jens
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Sean Boon avatar
There is a bit of a cottage industry right now with people adding an external antenna to the ASIAir Pro.   I think this video on YouTube describes the process.  There are people on the ASIAir Pro Facebook community page that will do this for you if you don't have the materials or would be apprehensive about making the changes yourself.  

-Sean
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Jens Mascher avatar
ZWO introduced a WiFi Dongle to "pimp" the ASIAir Pro with extended WiFi. The idea of a full aluminum housing was good, but nobody in China was thinking about the WiFi problems occuring with this decision…
Howard Richard avatar
I have to add my vote to the TP-Link AC750 Wi-Fi Travel router. I have it set to range extender mode. It sits on my power supply (which sits just under the mount) and just works.
Brian Boyle avatar
Hi Jens,

I don't know if this is applicable to your situation, but it worked for me.

Like you, I had terrible problems with the ASIAir Pro losing connection or glacial transfer speeds to my iPhone (longer than 5 minutes for a full frame sensor).

I have a series of Google wifi points to help with my wireless signal at home.  I also have one in my Observatory, sitting underneath my mount about 10m away from the next nearest Google wifi, but with a good connection.   All I did was plug in an ethernet cable from the port on the ASIAir Pro to the ethernet port on the Google wifi.    The ASIAir Pro picked up the connection without me having to do anything further (although the ethernet cable had to be connected before I booted the ASIAir) and it worked really well. 

I hope you fix your problem, whatever route you choose. 

CS Brian
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Kelly Wood avatar
+1 for just using an ethernet connection. The AISAIR is basically (well, not basically… it is) a Raspberry Pi. Even the latest Pis have notoriously weak WiFi. Putting them in a metal box, like the ASIAIR case, makes it even worse. After struggling with the WiFi signal on my Pi, I eventually just got an ethernet over power setup (the TP-Link power line). Connection remains rock solid and transfer speeds are very fast, even when the TP-Link at the telescope is on a 100' extension cord. For remote work from a camper, I just use direct ethernet (Pi to laptop) with a long ethernet cable. 

-Kelly
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