A friend just got a new CGX, and he also bought an Asiair Pro to control it with. Well, guess what? Surprise, surprise, the Asiair won't connect to the mount. No matter what we tried, no connection. Yes, we were connected through the hand control...We tried a laptop with ASCOM drivers, we could control the mount perfectly. We hooked it up to CPWI, it worked perfectly. It's only Zwo who seems to flip the middle finger to Celestron users.
I have read on Zwo's forum that it's big, bad Celestron who changed the chipset in the mount for USB, and that's why the Asiair won't work with it. Zwo seems to be the only one who cannot make it work, because ASCOM and CPWI have no problems.
Well, if one digs deep enough, one can find a solution! Evidently, Celestron (and Sky Watcher) changed from FTDI usb chipsets, and is now using Prolific usb chipsets. I found a link to a Zwo operating system that has the Prolific drivers.
That file can be found here - https://drive.google...3DaEnKzox9/view
It's a zip file, 7 gb in size.
You need to use Windisk Imager to write the extracted file to a 64 gb micro sd card that has been formatted as exfat. If you're going to do this, be aware that this OS will NOT fit on a 32 gb card, you need the 64 gb at minimum.
Long story short, I produced an sd card with the new operating system on it, the AAP booted up, ipad showed an update was available, so we updated it, activated it, and the CGX can now be controlled with the AAP!
This is the sort of bad news that makes me question the wisdom of moving from RS-232 to USB for low-bandwidth uses like mount control. The "gotcha!" is USB requires OS-specific support, usually in the form of a driver, for the particular USB equipment in use. For the foreseeable future, there are bound to be a variety of devices that will emulate good ol' RS-232 over a variety of communication media: USB, Bluetooth, WiFi, and Ethernet. When (not if) one goes so obsolete it's no longer supported by current OSs, the remedy is to replace an adapter (which are currently often quite inexpensive) instead of replacing a mount or nursing an old computer along. I still cringe at my brother's expensive film scanner - its manufacturer did not provide drivers for Windows newer than XP or for Macs of similar age. Eventually a third party started selling more up to date drivers that provided most of the functionality of the mfgr's old driver, but the new driver cost hundreds of dollars because driver development is expensive and the market was small. It was worth it for him to pony up for the driver, but, ugh!
Still, one aspect of this particular development seems odd... does this problem happen only when the AAP is connected to the CGX's USB-B connector, or does it also manifest if connected via a NexStar+ USB-equipped handset (mine includes a Prolific chipset and is several years old)? If the latter, wouldn't that also affect all those AVX mounts and others? If so, ASI will have to quit finger-pointing and support manufacturers' equipment as it exists, not how they want it to be, or kiss that equipment's share of the market goodbye - and for NexStar+, that's probably a pretty significant part of the market. ASI ain't big enough to drive that market from their end.
Edited by SkipW, 19 September 2021 - 04:29 PM.