Rob Jones replied to the topic 'DIY Flatfield Dustcover with RPi' in the forum. yesterday

you might try a count weight along the plan of the flap.
provided you have clearance along the OTA, then only a very small weight would be required.

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Rob Jones replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 week ago

Thank you for your fast reply. I'll try again tomorrow.
Don't you ever sleep? :)

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Rob Jones replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 week ago

Kaczorek,
I've run into an install problem. Can't obviously see what I've done wrong.
Start point INDI server already installed.
system update & upgrade performed.
wiring pi already installed - checked with $gpio -v returns version 2.32

Then running your compile from source script :
all steps run as expected with no errors until the last line
>make install
This returns:
CMake Error at /home/rob/astroberry-amh/build/libs/AdafruitStepperMotorHAT_CPP/tmp/libAdafruitStepperMotorHAT-gitupdate.cmake:136 (message):
Failed to unstash changes in:
'/home/rob/astroberry-amh/libs/AdafruitStepperMotorHAT_CPP/'.
You will have to resolve the conflicts manually


I can only think i've got a dependancy issue, introduced when I sudo apt upgrade/updated the system?

Also on further checking I note that there is a newer version of wiringpi - which have you?
Maybe i had an ADAfriuit library already installed within the other packages?

Also when I've started up the indi server again with:
indiserver -l /var/log/indi -f /var/run/indi -p 7624 indi_amh_focuser

i get
2017-06-14T22:59:42: startup: indiserver -l /var/log/indi -f /var/run/indi -p 7624 indi_amh_focuser
2017-06-14T22:59:42: open(/var/run/indi): No such file or directory.
2017-06-14T22:59:42: good bye

so it would seem the install failed to complete properly somewhere in the process? Before I reinstall everything from fresh, i wondered if there was anything obvious i'm missing, like a prerequisite?

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Rob Jones replied to the topic 'Building the induino MeteoStation with 3d printed housing' in the forum. 3 weeks ago

A very professional job!
If you are happy to share your STL files for the £D printer design, i'm very temped to have a go myself. :)

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Rob Jones replied to the topic 'Raspberry Pi based Observatory Controller' in the forum. 1 month ago

Interesting stuff.

I've gone for Pi Zero W, with an EnviroPhat from Pimoroni.com.(Temp/Baro/Mag/Accel/lightsensor/anaolguex4). Like you, I thought might need the full 9 degrees of motion for accuracy, but I have found the compass alone is sufficient/accurate and gives good repeatable readings. I guess you might need to be careful where you place it (ie nowhere near motors!). I've loaded the Zero with SAMBA and MQTT and getting very good low power unit. I'm playing with the pi-supply circuit so that you can software-instruct the device to power-down safely. My thoughts are my shutdown sequence will include a dome rotation to a fixed home point where slip-connectors will recharge the batteries in the dome roof. An auto power up circuit will trigger the Pi to power up when I move the dome off the recharge point - not designed that yet. Thus I have software control on power-up and power down for the dome as well.
I will be extending the unit to control the shutter open/close, and of course being a Pi I also have a Webcam option too! (all under $60).

Keep us all posted - I very much in learning mode, but tinkering away when I have chance. Do you have some software on the go?

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Rob Jones replied to the topic 'Raspberry Pi based Observatory Controller' in the forum. 1 month ago

Your references to home automation - any update on designs decisions made? I've considered Home assistant and MQTT as the way to go - it solves a number of technical interfacing problems, but you might also take a look at "mydevices.com" its developing very fast in the sensor/Rpi automation IoT space.

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Rob Jones replied to the topic 'Raspberry Pi based Observatory Controller' in the forum. 1 month ago

I'm a recent convert to the INDI software, and have been reading through loads of material in an attempt to solve a number of my Observatory dome setup tasks. I've been following your material with some interest since I too have settled on a very similar design approach to the one you seem to be following.
Like you, I did a long list of wants/wishes for I/O stuff. We pretty well have matching lists, albeit there are generic type devices differences (air con, dehumidier, heater lights/red lights etc), which any relay port can drive, and I will have different needs to yours.

But I do have one 'sensor' that is novel and doesn't fit anything I've come across so far and ay be worthy for you to consider. In my design I have approached the dome rotation controller as an asychonous process from the dome motor mechanism (ie I don't need to count steps and calibrate incremental movement from a fixed angle e.g. micro switch trigger for home location type thing). Instead, I intend to make the dome rotation motors match the telescope RA with reference to feedback from a dome angle detector (magnetometer). I intend to instruct the dome motor controller to track RA, or rotation to home position etc.

I have not solved how to make this data available within the INDI framework as yet, (although the sensor is running happily providing reliable angles in real-time to an IP addressable process). Obviously my approach is quite specific to me and my setup, but I would be interested to know if you have encountered similar issues in your design, and how you have solved them.

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Rob Jones created a new topic ' INDI Website missing page reference' in the forum. 1 month ago

The INDI website has a missing/broken page which results in a browser error 404:
HOME>DEVICES>AUXILIARY>Raspberry Pi GPIO
The link to the drivers is not there:
indilib.org/develop/indiforjava/raspberry-pi-gpio-driver.htm
I’d be grateful if I could access this reference?

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There is a broken link of the indiweb.org website.
The page DEVICES/AUXCILLARY/ has several options. The Raspberry Pi GPIO link is ok, but the...
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Rob Jones replied to the topic 'Celestron CGE ethernet/serial link' in the forum. 1 month ago

Hackaday:
hackaday.io/project/21088-raspberry-pi-driven-telescope-mount

also has a you tube demo:
youtu.be/n1dQ16B802E

I'm currently purchasing RJ11 connectors to connect physically, and not pull my handset apart. but looks good.

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Rob Jones replied to the topic 'Celestron CGE ethernet/serial link' in the forum. 1 month ago

Found a link to install a RPi W into my celestron handset, and installed INDI drivers! All wireless. brilliant.

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Rob Jones replied to the topic 'Celestron CGE ethernet/serial link' in the forum. 1 month ago

That approach doesn't work. The adaptors are 'dumb' connectors, they can't be connected to a LAN and be allocated a IP address. There only real use are to convert one cable type into another for extending the useful length of a serial cable.

I have seen these:
www.ebay.co.uk/itm/NEW-StarTech-NETRS232...9:g:W1sAAOSwzgBY0pgt

which will provide an IP addressable Serial link to the network. Is this what INDI web server currently handles?

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Rob Jones replied to the topic 'Rpi DIY mount stepper control upgrade?' in the forum. 1 month ago

To reliably control Stepper motors, my preference is to use a stepper motor controller board, which reduces the interface problem to two digital pins: Step and direction (CW/CCW). Its opt -isolated inputs and range of powers make that a good choice - but admittedly over kill! and there are smaller versions, but target the ones that are opto-isolated, as they provide protection to the electronics that is necessary(even when powered down, moving the motors will damage your system)!

www.ebay.co.uk/itm/CNC-Single-Axis-4A-42...JNI67IKq7pOrIIxPvhpA

The small added complication is that RPis work on 3.3v and these microcontrollers may not (TTL=5v, and needs c4.5v to register a logical true). But using a voltage level shifting circuit you can connect them up and they work very reliably.

www.ebay.co.uk/itm/5V-to-3-3V-Logic-Leve...b:g:FywAAOSwa-dWtA0V

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Rob Jones replied to the topic 'Rpi DIY mount stepper control upgrade?' in the forum. 1 month ago

Loads of stuff around, came across this refrence to some interesting work relevant to your endeavour.
github.com/bobthepiman/TwoStepperControl.git
I'm interested in your progress, so keep the posts flowing.

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Rob Jones replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 month ago

I think the motor HAT work with Pi3, as its the same GPIO layout (might want to Beef your power supply up though). I haven't checked the HAT Software drivers out, but I image that they will only be dependent upon Python versions 2.7 or 3, and so not a Pi2/3 issue.
regs
rob

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