See the troubleshooting section of the electronics page.
See Calibration to determine whether this is actually the case.
If you have determined that one of the axes is turning the wrong way, you can edit your local config (see FirmwareConfiguration) to include one of the following lines:
#define RA_INVERT_DIR 1 to reverse the direction of the RA ring
#define DEC_INVERT_DIR 1 to reverse the direction of the DEC ring
If the upload completed and the RA drivers LEDs blink (for the BYJ48 steppers), the code is working. You will have to adjust the screen contrast via the potentiometer on the LCD. Turn the tiny screw on the small blue box until letters are visible on the LCD. This might take a lot of turns.
This can happen when the Arduino runs out of memory. Make sure you are on a supported device (Arduino Mega or ESP32). Check the output of Arduino IDE when uploading. If the program usage goes above 80%-85% or the data above 75%, you might be experiencing this.
Sometimes (on some shields) the buttons act strange and e.g. LEFT triggers a DOWN (or other combinations). This is due to the shields being manufactured differently. Some shields provide different voltage levels on the A0 pin and OAT Firmware assigns them to wrong buttons.
To check for this, place the following line in you
#define LCD_BUTTON_TEST 1
and recompile/upload. The display will now show the numeric value that each button generates as well as how the firmware will interpret the button. If one of them is off, make a note of the numeric value it generates.
Then open the
LcdButtons.cpp file and adapt the thresholds of the following code lines (near line 90) to appropriate values (with some some reasonable paddings):
if (_analogKeyValue > 1000) _currentKey = btnNONE; else if (_analogKeyValue < 50) _currentKey = btnRIGHT; else if (_analogKeyValue < 240) _currentKey = btnUP; else if (_analogKeyValue < 400) _currentKey = btnDOWN; else if (_analogKeyValue < 600) _currentKey = btnLEFT; else if (_analogKeyValue < 920) _currentKey = btnSELECT;
You really should work through the Calibration to make sure it's moving correctly.
When you use either the LCD or the PC OATControl app, using the arrows to move the mount from startup should cause this behavior (in the northern hemisphere):
If the mount moves when you set coordinates but doesn’t if it’s tracking, check the LEDs on the RA driver. They should be “marching” in a straight pattern. If they do, the mount is tracking, but keep in mind that the movement is extremely slow, too slow to actually see any movement. To test the tracking, leave the mount on for 10-20 minutes and see if it has moved a little.
First check that you have correctly set
RAPulleyTeeth in OpenAstroTracker.hpp. If you printed the RA pulley, you will need to change it to 20. If you purchased gears, count how many teeth they have, they usually come in 20 and 16 tooth variants.
If you have set this correctly and are still getting star trails, look at the direction in which they occur. RA Tracking speed errors will cause horizontal streaks. If this is the case, you should set the Speed Calibration setting to either speed up (make it larger than 1.0) or slow down (make it less than 1.0) tracking. Access this in the CAL menu.
If you streaks are not continuous, you may have bumped the mount or other vibrations may have caused it. Telescopes are very sensitive to vibrations.
If the streaks are not horizontal you may not be correctly Polar aligned. If you have aligned by Polar Alignment only, you may need to also do a Drift Alignment to get an exact polar alignment.
This is a common behavior. The gears in the motor have become misaligned and first have to overcome the backlash. Wait one or two minutes and things should be back to normal. Current firmware does account for backlash when using GoTo to slew to various locations, but not after a manual slew.
Did you enable configure the ASCOM properties of the mount to use the correct baudrate and port? Note that plugging the OAT into different physical USB ports can change the COM number that it uses.
To find the right COM port, open Device Manager and look under the section "Ports (COM & LPT)". (Un)plug the OAT and note which device appears. If you do not have the correct drivers it may show up in "Other devices". Google the name to find the right driver.
Yes, the current code base does not support Bluetooth. It is on our long-term plan of features, so it may come at some point in the future. The other wireless option is to use the ESP32 board, which support WiFi connectivity.
Check both the PC and ESP32 are on the same network (2.4GHz only, not 5GHz!) and double check that it is connected from your router settings or with a wireless scanner app.
If it is still not detected, go to "Network & Internet settings" > "Change adapter options" and right-click & disable any network adapters besides the one you are currently using to make sure OATControl is broadcasting to the right one. You may need to click the Rescan button on the Connect dialog.
There can be a number of reasons why OATControl can't connect to OAT.
To make sure that connectivity is correct, use the Monitor window in Arduino IDE to connect at 19200 and once connected, type
:GVP# in the bar at the top and hit Send. If you see
OpenAstroTracker# appear in the window, everything is working as expected.
The AR0130 sensor has a bug where the exposure is not set correctly. An easy workaround:
Note: Make sure that the slider at the bottom in PHD2 isn't too far to the right side. The max exposure the camera can do is 0.5s, but if you select a higher time in PHD2's main window, it will stack those 0.5s exposures to match your selected time. Recommendation is 2s (4x 0.5s stacked images).
If you have the LCD, check whether the asterisk in the display is blinking. If it is not blinking, then the GPS unit is not communicating with the Arduino. Make sure that Arduino TX pin is connected to the GPS RX pin and the Arduino RX pin is connected to the GPS TX pin.
You can also skip this step (if you indoors, testing, for example), by pressing
RIGHT. You then will get a menu asking whether to
Sync (use the GPS), or
Set (using buttons) the HA. Use the LEFTbutton to select
Set and then hit
It is possible to get a fix indoors, but it can take up to 10 minutes of uptime.
For ASCOM Logs: In the ASCOM Chooser Dialog, check the option to enable Trace Logging. Then execute the action that causes problems and shutdown the app. Navigate to your
\Documents\ASCOM\Logs YYYY-MM-DD\ folder, you’ll find log files in here.
For OATControl logs: Start OATControl and click on the
Log Files button, this will open the logs folder which is in your AppData folder:
C:\Users\<you>\AppData\Roaming\OpenAstroTracker\. The logfiles of you last 6 sessions will be saved there.
For PHD2 Logs: Navigate to
\Documents\PHD2\. There will be a bunch of .txt files, containing either DebugLog or GuideLog. For troubleshooting your guiding, we are interested in the
Well, this is an Open Source project, so technically there is no official support. However, we will all try to help you as best we can, either on