INDIGO is the next generation of INDI, based on layered architecture and software bus.

This is the list of requirements taken into the consideration:

No GPL dependency to allow commercial use under application stores licenses.
ANSI C for portability and to allow simple wrapping into .Net, Java, GOlang, Objective-C or Swift in future
Layered architecture to allow direct linking of the drivers into applications and or to replace wire protocol.
Atomic approach to device drivers. E.g. if camera has imaging and guiding chip, driver should expose two independent simple devices instead of one complex. It is much easier and transparent for client.
Drivers should support hot-plug at least for USB devices. If device is connected/disconnected while driver is running, its properties should appear/disappear on the bus.
FITS, XISF, JPEG, TIFF, RAW, AVI and SER format supported directly by the framework.

This is already done

Framework

INDIGO Bus framework
XML & JSON protocol adapter for client and server side
indigo_server - server with loadable (indigo .so/.dylib and indi executables) drivers
indigo_server_standalone - server with built-in drivers
INDIGO Server for macOS wrapper (provided just as an example)
Integrated HTTP server for BLOB download & server control (= web based INDI control panel)
indigo_prop_tool - command line tool to list and set properties

Drivers

CCD (with wheel, guider, AO and focuser) simulator
Mount simulator
Atik CCD (Titan, 3xx/4xx/One with built in wheel, VS/Infinity, 11000/4000) driver
Atik EFW2 filterwheel driver
SX CCD driver
SX wheel driver
Shoestring FCUSB focuser driver
SSAG/QHY5 CCD driver
ASI wheel driver
IIDC CCD driver
ASI CCD driver
NexStar mount driver (supports Celestron NexStar and Sky-Watcher mounts)
LX200 mount driver (supports Meade, Avalon, Losmandy, 10microns, AstroPhysics, ZWO and PegasusAstro mounts and EQMac)
FLI filter wheel driver
FLI CCD driver
FLI focuser driver (testers needed)
USB_Focus v3 driver
SBIG CCD driver (with guider, guider CCD and external guider head)
SBIG Filter wheel driver (part of CCD driver)
ASCOM driver for INDIGO Camera
ASCOM driver for INDIGO Filter Wheel
QHY CCD driver (NOTE: Maybe unstable due to inherited instability in the QHY SDK)
ZWO USB-ST4 port
Meade DSI Camera driver
Takahashi Temma mount driver
ICA (ImageCapture API) driver for DSLRs (Mac only, deprecated)
GPS Simulator
NMEA 0183 GPS driver
Andor CCD driver (32/64-bit Intel Linux only)
WeMacro Rail focuser driver (platform independent USB & Mac only bluetooth)
EQMac guider driver (Mac only, deprecated)
Apogee CCD driver
Moravian Intruments CCD and filter wheel driver
HID Joystick AUX driver
CGUSBST4 guider driver
Brightstar Quantum filter wheel driver (untested)
Trutek filter wheel driver (untested)
Xagyl filter wheel driver (untested)
Optec filter wheel driver (untested)
Pegasus DMFC focuser driver
RigelSys nSTEP focuser driver
RigelSys nFOCUS focuser driver (untested)
iOptron mount driver
MoonLite focuser driver
MJKZZ rail focuser driver (untested, platform independent USB & Mac only bluetooth)
GPhoto2 CCD driver (deprecated, excluded from build)
Optec focuser driver (untested)
ToupTek CCD driver
AltairAstro CCD driver
RTS-on-COM aux (shutter) driver (untested)
DSUSB aux (shutter) driver
GPUSB guider driver
LakesideAstro focuser (untested)
SX AO driver
SBIG AO driver (part of CCD driver)
SynScan (EQMod) mount driver
ASCOL driver
ASI Focuser driver
DeepSky Dad AF1 and AF2 focuser driver
Baader Planetarium SteelDrive II focuser driver
Unihedron SQM driver
Artesky Flat Box USB driver
NexDome dome driver (untested, based on G.Rozema's firmware)
USB_Dewpoint V1 and V2 AUX driver
Pegasus Astro FlatMaster driver
AstroGadget FocusDreamPro / ASCOM Jolo focuser driver added
Lacerta Flat Box Controller AUX driver
UVC (USB Video Class) CCD driver
NexDome v3 dome driver (untested, requires firmware v.3.0.0 or newer)
Optec Flip-Flap driver
GPS Service Daemon (GPSD) driver
Lunatico Astronomy Limpet/Armadillo/Platypus Focuser/Rotator/Powerbox/GPIO Drivers
Lunatico Astronomy Limpet/Armadillo/Platypus Rotator/Focuser/Powerbox/GPIO driver
Lunatico Astronomy Dragonfly Dome / Relay Controller GPIO driver
Rotator Simulator Driver
Lunatico AAG CloudWacher driver
Baader Planetarium Classic (Rotating) dome driver
MGBox driver
Manual wheel driver
PMC8 mount controller driver
RoboFocus focuser driver
QHY CFW filter wheel driver
RainbowAstro Mount driver
NexStar AUX protocol mount driver
Lunatico Astronomy AAG CloudWatcher driver
MyFocuserPro 2 focuser driver
Interactive Astronomy SkyRoof driver
ASTROMECHANICS focuser driver
Nexdome Beaver dome driver
ASTROMECHANICS Light Pollution Meter PRO driver
Optec Pyxis rotator driver
SvBony camera driver
Geoptik flat field generator driver
Talon 6 dome driver
Interactive Astronomy SkyAlert driver
Vixen StarBook mount driver
PlayerOne camera driver
PegasusAstro Prodigy Microfocuser driver
PegasusAstro Indigo wheel driver
PegasusAstro Falcon rotator driver
OmegonPro CCD driver
MallinCam CCD driver
RisingCam CCD driver
Orion StarShotG CCD driver
OGMA CCD driver
PrimaLuceLab focuser driver
ZWO ASIAIR Power Ports
Wanderer Astro WandererBox Plus V3
Wanderer Astro WandererBox Pro V3
Wanderer Astro WandererCover V4-EC
iOptron iEAF focuser driver
Optec FocusLynx focuser driver
PegasusAstro FocusCube3 driver
Lacerta LACERTA Motorfocus driver

This is under development

a-Box Adaptive optics driver

How to build INDIGO

Prerequisites

Ubuntu / Debian / Raspbian

sudo apt-get install build-essential autoconf autotools-dev libtool cmake libudev-dev libavahi-compat-libdnssd-dev libusb-1.0-0-dev libcurl4-gnutls-dev libz-dev git curl bsdmainutils bsdextrautils patchelf

It is advised to remove libraw1394-dev

sudo apt-get remove libraw1394-dev

Fedora

dnf install automake autoconf cmake libtool gcc gcc-c++ libusb-devel avahi-compat-libdns_sd-devel libudev-devel git curl curl-devel zlib-devel

It is advised to remove libraw1394-devel

dnf remove libraw1394-devel

macOS

Install XCode and download and build autoconf, automake and libtool (use tools/cltools.sh script).

Get code and build it

git clone https://github.com/indigo-astronomy/indigo.git

cd indigo

make all

build/bin/indigo_server -v indigo_ccd_simulator [other drivers]

and connect from any INDIGO/INDI client or web browser to localhost on port 7624...

No pthread_yield()

New linux distributions come with the latest glibc that does not provide pthread_yield() However libqhy.a depends on it. We do not have control over this library and it is not officially supprted by QHY any more. So if you get complaints by the linker for missing pthread_yield call please execute the folowing command in indigo_drivers/ccd_qhy/bin_externals/pthread_yield_compat/:

make patchlib

and rerun the build