In addition to my astronomy hobby, I professionally use WiFi to stream sports venue video data for Internet broadcast from a CCTV camera to a laptop often circa 150 metres distant. This is clearly impossible with domestic WiFi, but from this experience I can offer some tips that will assist with domestic WiFi and astronomy...
1. The 2.4Ghz Channel used by Celestron is stronger than the 5Ghz channel.
2. However, the 2.4Ghz channel tends to be cluttered in urban locations and interference is inevitable.
There are also known interference problems where USB3 devices are in close proximity to WiFi devices.
3. To succeed over extreme distances, I use a pair of KuWfi point to point devices and 2.4Ghz.
4. These have a quoted range of 2Km, but for video, I find 200 metres is about the limit. But.....
5. A human standing in the line of sight is sometimes suffice to block the signal (hence I elevate them).
6. Metal objects (like a parked car) passing between can scatter the signal. Line of sight is critical with directional aerials.
7. I have concluded that if the line of sight between your telescope and tablet device is broken you might similarly suffer. If you walk away the connection will inevitably drop. But if you simply turn around with device in hand your body might diminish the signal strength!
8. I get best results from my telescope where my devices are connected in Access Point mode to a Netgear EX8000 wireless extender with a clear line of sight. Connecting to my more distant router is more flaky. Connecting in Direct mode to tablet is often flaky. This is despite upgrading from first generation Evolution WiFi, through secind generation SkyPortal dongle to the latest SkyPortal external WiFi accessory technology.
9. If using Windows Remote Desktop disable RemoteFX compression else you are restricted to 10Mbps.
10 Beware of 'unlimited' data contracts. For example, in the UK, Vodafone Life limits you to 2 Mbps, Vodafone Unlimited 10 Mbps; you need Vodafone Max to carry heavy data loads.
11. Whilst tip 10 relates to 4G, your domestic WiFi is similar. If all your family is streaming Netflix to their personal devices you are competing for domestic bandwidth. That isn't relevant if your tablet device is in Direct connect mode to your telescope except that WiFi Clutter is an inevitable greater risk.
12. Using a tablet can be fraught with perils. Battery savers and notifications can bust your connection.
13. In summary, for my telescope I now connect scope to a mini computer and from that to a second. laptop (indoors) using a local WAN that I have established and remotely control it using Windows Remote Desktop running CPWI software. It's a far more stable route than tablet/SkySafari. I control scope, camera, Starsense wholly remotely and am succeeding with 4K UHD Astrophotography after disabling RemoteFX compression. For details of how to do this, there is plenty of guidance in the EAA section.
The bottom line is that if you use a tablet/Celestron WiFi you must expect some issues especially with older devices. It is now dated technology and the aerial devices in use are generally poor. For example, an I-Phone 5C isn't as good as an I-Phone XS. Domestic WiFi whether direct or access point inevitably suffers from 'lost packets'. The Netgear EX8000 wireless extender that I use helps as it uses powerful MESH technology and replicates what I do with the KuWfi devices at sports grounds. Best results will come from newer devices (phones/tablets). However, nothing wireless will ever be as good/reliable as cat6 cable! Note too that USB and HDMI are limited to extreme short distances. WiFi can be better than those with point to point technologies.
Edited by Noah4x4, 09 September 2019 - 03:04 AM.