I'm using Stellarmate Gphoto shows ver 2.6. After system updates the relay doesn't operate and reports can't open port or exposure failed. Can you advise how to update Stellarmate INDI driver to v2.7?


Hi Jasem, I'll test later this evening.

I only have experience with the Nikon D5100 however this list below is what I believe to be the Nikon and Canon DSLRs with serial shutter release.

Nikon D3S Serial Shutter
Nikon D40 Serial/IR Shutter
Nikon D40X Serial/IR Shutter
Nikon D60 Serial/IR Shutter
Nikon D80 Serial/IR Shutter
Nikon D90 Serial Shutter
Nikon D200 Serial Shutter
Nikon D300 Serial Shutter
Nikon D300S Serial Shutter
Nikon D5000 Serial Shutter
Nikon D5100 Serial Shutter
Nikon D7000 Serial Shutter
Canon 1Ds Mk II Serial Shutter
Canon 5D Serial Shutter
Canon 20D Serial Shutter
Canon 20Da Serial Shutter
Canon 30D Serial Shutter
Canon 350D / XT Serial Shutter
Canon 400D / XTi Serial Shutter


Hi Jasem, thanks for your reply.

Yes it creates /dev/ttyUSB0 I've also seen /dev/ttyUSB1 when my EQMod adapter was connected
I'm using a powered USB hub

[ 1313.906441] usb 1-1.2: new high-speed USB device number 5 using dwc_otg
[ 1314.036832] usb 1-1.2: New USB device found, idVendor=1a40, idProduct=0101
[ 1314.036849] usb 1-1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 1314.036858] usb 1-1.2: Product: USB 2.0 Hub
[ 1314.040258] hub 1-1.2:1.0: USB hub found
[ 1314.040364] hub 1-1.2:1.0: 4 ports detected
[ 1333.306503] usb 1-1.2.3: new full-speed USB device number 6 using dwc_otg
[ 1333.464065] usb 1-1.2.3: New USB device found, idVendor=0403, idProduct=6001
[ 1333.464081] usb 1-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1333.464090] usb 1-1.2.3: Product: FT232R USB UART
[ 1333.464098] usb 1-1.2.3: Manufacturer: FTDI
[ 1333.464107] usb 1-1.2.3: SerialNumber: A902Y85W
[ 1334.729977] usbcore: registered new interface driver usbserial
[ 1334.733161] usbcore: registered new interface driver usbserial_generic
[ 1334.733315] usbserial: USB Serial support registered for generic
[ 1334.748082] usbcore: registered new interface driver ftdi_sio
[ 1334.748506] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 1334.748945] ftdi_sio 1-1.2.3:1.0: FTDI USB Serial Device converter detected
[ 1334.749423] usb 1-1.2.3: Detected FT232RL
[ 1334.750992] usb 1-1.2.3: FTDI USB Serial Device converter now attached to ttyUSB0


Hi, I'm just starting out in moving away from a Windows laptop to using Stellarmate on a RP3+. It looks like a great compact way of controlling my gear and gives the ability of a light weight low energy control kit for journeys into the wilds.

I've setup my HEQ5 mount using EQMod , guide camera and my DSLR - Nikon D5100. Everything has connected and appears to be working well after some recommended tweaks to the INDI drivers.

The Nikon camera has limitations via USB and can only expose up to 30 secs and needs a serial shutter release to expose longer in BULB. In my Windows 10 setup I put together a USB - RS232 FTDI cable but ran in to problems due to low temperature. It was very unreliable then failed completely. I then found the KMTronic USB to Serial single channel relay. This worked well in BackyardNikon rather than pick COM4 in the setup I'd choose RelayCOM4.

I'm wondering whether you would consider adding support for a FTDI USB relay controller. This is proven to work with APT and BackyardNikon to control the Bulb settings on serial based Nikons plus others. I have assembled this and it does control the shutter unfortunately my programming knowledge falls far short of going further. Based on using the FTDI232 chip it controls a simple relay on or off with 1 normally open or 1 normally closed contact.

KMTronic USB Relay Controller