I am currently using dronekit-python to implement somewhat of a Mission Planner clone, as an API. I've generally been able to replicate most important features from Mission Planner; however, some features don't seem to be present.
One such feature is reading live servo outputs, which can be done in Setup > Mandatory Hardware > Servo Output (image below). I have been able to emulate getting/setting the output's function, min, trim, max, and reversed values through parameters. However, I cannot seem to access the live position values through dronekit. How would you go about this?
A second feature is reading specific values from the plane, beyond the class attributes present. This is available in Mission Planner when double-clicking a value in the Quick pane in order to change what measurement is displayed (image below). For my use case, I'd like to specifically access battery_voltage2 and battery_remaining2, as these are vital measurements for our system. I tried using vehicle.battery in dronekit, but this seems to only display data from battery 1. Any ideas?
Thank You so much for the help!
It might be possible to get the battery information and other information from the drone by using Mavlink messages. For battery information, look at the BATTERY_STATUS (#147) Mavlink message. For servo information, look at the SERVO_OUTPUT_RAW (#36) message.
In order to receive these messages, look into using message listeners from dronekit-python. You should be able to receive and parse the Mavlink message.
In general, you can use message listeners and the dronekit-python message factory to receive and send Mavlink messages, which allows you more control than some of the built-in dronekit functions. If you decide to control the drone this way, though, be careful because it's pretty easy to mess up your logic and have the drone behave unexpectedly.
Hope this helps!
Related
I'm not able with any youtube tutorial and blogs to make a joystick movement for my topdown 2d game on godot
as I said, follow step by step several tutorials on the internet / youtube and I couldn't get my joystick for my topdown2d game
You should not need any special code to use a joystick with Godot. Run of the mill code like this should work:
extends KinematicBody2D
var speed := 500.0
func _physics_process(_delta:float) -> void:
var velocity := Vector2(
Input.get_axis("left", "right"),
Input.get_axis("forward", "backward")
) * speed
move_and_slide(velocity)
Either that or something similar you might find in most tutorials. Which probably use "ui_left", "ui_right", "ui_up" and "ui_down" which are pre-defined actions. And yes, there are also pre-defined joystick inputs for those actions, but they might not be correct for your device.
Before configuring the actions, make sure the device is recognized by the operating system (you might need to install/update drivers). You might also want to run a diagnostic tool to check if it can send input.
Now, configure the actions on Project Settings -> Input Map. You can add new actions or modify the pre-existing ones. Once you have the action defined, click on the "+" icon on the right, and there you will find the "Joy Button" and "Joy Axis" options which will let you configure the joystick input for the action. Double click will allow you to modify the existing ones.
There is always the chance you configured the wrong input on the wrong action. You could figure it out by trial an error or with the help of a diagnostic tool.
If your device works, the configuration is correct and it still does not work. We could be talking of a compatibility issue. You might want to report a bug on github.
I can't help you further without knowing what did you try and the results you got.
I am learning to rewrite the code for the microcontroller integrated in the development Sim modules (such as Sim800C) to be able to control switching a device without having to use another MCU. If we can do that, we only need to add 1 transistor to be able to control a relay on and off.
I know at the output of the MCU (eg STM32F...) inside the sim module (eg sim800C) there will be a function to receive and read personal information stored in the sim card and decode the signal emitted from the Mobile base station: For example, when a call comes in, it will generate the sequence:
RING
+CLIP: "01203360211",161,"",0,"",0
....
So can anyone help me to know when the MCU outputs a string like the above, what will be its input 11110000,...? or something special in some form? I'm really confused. Thanks everyone!
In a professional context, I have to use the vl53L0x. This sensor was released recently, along with it's API, meaning that there's no help on the internet yet :
http://www.st.com/content/st_com/en/products/embedded-software/proximity-sensors-software/stsw-img005.html
This API contains some source and headers file, that I compiled with the gcc. It works fine, despite clearly lacking comments. I flash the memory of a stm32 (NUCLEO-F401RE), which controls a vl53L0x sensor via an I2C bus. I now want to add more vl53L0x sensors on the same I2C bus, and refer to this document (if you want to read it, go directly to the bottom half of the page 5, the wiring is already done) :
http://www.st.com/content/ccc/resource/technical/document/application_note/group0/0e/0a/96/1b/82/19/4f/c2/DM00280486/files/DM00280486.pdf/jcr:content/translations/en.DM00280486.pdf
The principle, that I already applied on other sensors, is that they all start with the same address. You then have to activate one, change it's address, then activate the next one, change it's address, etc.
Unfortunately, ST Microelectronics didn't publish the list of the I2C registers, so I have to use their API to control multiple sensors. The document linked above explains how to do so. Among other things, it specifies :
In vl53L0x_platform.h API file
• Set VL53L0x_SINGLE_DEVICE_DRIVER macro to 0 so that API implementation will
be automatically adapted to a multi-device context.
I looked everywhere in the API folder, I was not able to find any reference to a VL53L0x_SINGLE_DEVICE_DRIVER macro. Setting it to 0 won't change anything, as this string is not present anywhere in the API files. Did anyone run into a similar problem ?
I'm working on the same thing. It seems that you're further ahead than I am. However, putting this in my while(1) loop seems to make both the sensors work.
ResetAndDetectSensor(0);
TimeStamp_Reset();
The guide says that in order to use all the sensors simultaneously, you need to pull the XSHUT pin high for all the sensors, reset the timestamp and then pick up the sensor which actually detects something.
I have Ardupilot on plane, using 3DR Radio back to Raspberry Pi on the ground doing some advanced geo and attitude based maths, and providing audio feedback to pilot (rather than looking to screen).
I am using Dronekit-python, which in turn uses Mavproxy and Mavlink. What I am finding is that I am only getting new attitude data to the Pi at about 3hz - and I am not sure where the bottleneck is:
3DR is running at 57.6 khz and all happy
I have turned off the automatic push of logs from Ardupilot down to Pi (part of Mavproxy)
The Pi can ask for Attitude data (roll, yaw etc.) through the DroneKit Python API as often as it likes, but only gets new data (ie, a change in value) about every 1/3 second.
I am not deep enough inside the underlying architecture to understand what the bottleneck may be -- can anyone help? Is it likely a round trip message response time from base to plan and back (others seem to get around 8hz from Mavlink from what I have read)? Or latency across the combination of Mavproxy, Mavlink and Drone Kit? Or is there some setting inside Ardupilot or Telemetry that copuld be driving this.
I am aware this isn't necessarily a DroneKit issue, but not really sure where it goes as it spans quite a few components.
Requesting individual packets should work, but that was never meant to be requested lots of times per second.
In order to get a certain packet many times per second, set up streams. A stream will trigger a certain number of times per second, and will then send whichever packet is associated with it, automatically. The ATTITUDE message is in the group called EXTRA1.
Let's suppose you want to receive 10 ATTITUDE messages per second. The relevant parameter is called SR0_EXTRA1. This defines the number of Attitude packets sent per second. The default is 4. Try increasing that parameter to 10.
I'm working on a HTML5 collaborative canvas drawing tool on GAE. Essentially people draw, send their coordinates and their motion to GAE through channel API and then other people receive the updates.
As required by the GAE documentation, I have a function in my javascript code to collect messages received from the server:
socket.onmessage= function (message) {
var s=message.data;
//Extract X,Y,motion out of s and Draw(x,y,motion)
};
However, the message data I'm sending are actually x and y coordinates and a string of either ("start"/"drag") in the form of:
x=505.0000457763672&y=111.66667175292969&type=start
I actually have no idea about any of the variables or features in this 'message' class and I wouldn't know to use 'message.data' if I didn't see it in someone else's source code - is this actually documented anywhere? I'd like to be able to use the substring features to effectively extract the 3 values but they don't seem to work with message.data.
Any idea if there are detailed documentations on the full member functions/classes/variables documentation on the message class?
Any input is much appreciated!
I wouldn't say it's documented WELL, but it is documented in the channels API docs:
https://developers.google.com/appengine/docs/python/channel/javascript
It specifically does say the message object has a parameter called 'data'.
You should be able to use javascript substring features just fine, but unless you show your code, no one will be able to help you with that.