dbaldwin’s gists

dbaldwin / Setting up T265 on Raspberry Pi 4 with NXP FMU

Last active May 15, 2020 15:39

	# From this article
	https://ardupilot.org/dev/docs/ros-vio-tracking-camera.html

	# This works well on Pi4 (don't forget to change the script to include the python bindings)
	# If you receive an error about CXX not found make sure to follow the article above and set the env variables
	# export CC=/usr/bin/gcc-7
	# export CC=/usr/bin/g++-7
	https://github.com/IntelRealSense/librealsense/blob/master/doc/libuvc_installation.md

	# Install ROS Wrapper

dbaldwin / Simple Arm, Takeoff and Land with Pi4, MAVROS, ROS Bridge, and roslibjs

Created May 11, 2020 20:11

	<!DOCTYPE html>
	<html>
	<head>
	<title>Disconnected</title>
	<meta charset="utf-8" />
	<script type="text/javascript" src="http://static.robotwebtools.org/EventEmitter2/current/eventemitter2.min.js"></script>
	<script type="text/javascript" src="http://static.robotwebtools.org/roslibjs/current/roslib.min.js"></script>
	</head>

	<body>

dbaldwin / Building vision_to_mavros on nano

Last active October 3, 2020 15:07

	Problem with catking_make. Error with cv_bridge and opencv3 missing. Followed this suggestion:

	https://github.com/ros-perception/vision_opencv/issues/320#issuecomment-618369623

	Then build broke at 75% with this error:

	/home/db/catkin_ws/src/vision_to_mavros/src/t265_fisheye_undistort.cpp:61:17: error: ‘CV_CALIB_ZERO_DISPARITY’ was not declared in this scope

	Based on the line here:

dbaldwin / Autostart ROS Service on Boot

Created April 22, 2020 20:46

https://risc.readthedocs.io/2-auto-service-start-afer-boot.html

dbaldwin / Installing Ubuntu Server 18.04 LTS and ROS Melodic with MAVROS on Raspberry Pi 4

Last active April 12, 2023 00:49

	Helpful links
	https://ubuntu.com/download/raspberry-pi
	http://wiki.ros.org/melodic/Installation/Ubuntu

	1. Download image and burn to SD card with Etcher

	2. The first challenge on boot of Pi is setting up the wireless network. This will require a keyboard and ethernet connection to Pi. I've documented a bit in this gist:
	https://gist.github.com/dbaldwin/fa1baac11b0ae2f000092b695c3d0b33

	3. After getting the network setup you'll want to SSH into the Pi. At least that's what I did.

dbaldwin / gist:fa1baac11b0ae2f000092b695c3d0b33

Created April 6, 2020 17:40

Ubuntu Server 18.04.04 LTS Raspberry Pi 4 Wireless Config with Netplan

	From this article:
	https://unix.stackexchange.com/questions/550296/how-to-set-up-wifi-on-ubuntu-19-10-server-running-on-raspberry-pi-4

	# This file is generated from information provided by the datasource. Changes
	# to it will not persist across an instance reboot. To disable cloud-init's
	# network configuration capabilities, write a file
	# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
	# network: {config: disabled}
	network:
	ethernets:

dbaldwin / gist:351cd33710e212cbe274757b411f9f76

Last active June 19, 2023 18:01

MAVROS Experimentation w/ Pi and Nano

	# PX4 launch command
	roslaunch mavros px4.launch

	# PX4 launch file (default fcu_url worked fine for Pi 4 running Ubuntu server)
	https://github.com/mavlink/mavros/blob/master/mavros/launch/px4.launch

	If using the mini USB connector on Pi 4 you can use the default fcu_url
	<arg name="fcu_url" default="/dev/ttyACM0:57600" />

	If using the telemetry 2 port on Pixhawk you need this.

dbaldwin / gist:fdae2fe9b83e03fcfa854815b0699dcb

Last active June 10, 2022 17:18

Tiling an FAA sectional chart with GDAL and viewing it as a layer in Google Earth

	# Dennis Baldwin
	# March 29, 2019

	# I've found the easiest and most consistent way to pull this off is with Docker and the following image
	# https://github.com/geo-data/gdal-docker

	# Change to your working directory and run the following Docker command
	# The command below will map your current directory to a /data directory in the container
	docker run -it -v $(pwd):/data geodata/gdal /bin/bash

dbaldwin / gist:d53e92f2bfe4f42e7a55d3e99ad9df71

Created January 25, 2019 23:43

Node-RED Flow for Sending Commands to Tello and Receiving Responses

[{"id":"2e9fa6db.59b79a","type":"tab","label":"Send Command and Wait for Response to Proceed","disabled":false,"info":""},{"id":"ceb0910c.e28dd","type":"debug","z":"2e9fa6db.59b79a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":770,"y":80,"wires":[]},{"id":"cc7f1214.9bc0a","type":"inject","z":"2e9fa6db.59b79a","name":"","topic":"","payload":"command takeoff land","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":"","x":140,"y":180,"wires":[["fdc7329e.d0c75"]]},{"id":"f362f3e3.67806","type":"function","z":"2e9fa6db.59b79a","name":"Simple triggered queue","func":"// if queue doesn't exist, create it\ncontext.queue = context.queue || [];\ncontext.busy = context.busy || false;\n\n// if the msg is a trigger one release next message\nif (msg.hasOwnProperty(\"trigger\")) {\n    if (context.queue.length > 0) {\n        var m = context.queue.shift();\n        return {payload:m};\n    }\n    else {\n        context.busy = false;\n    }\n}\nelse {\

dbaldwin / gist:2e082c7c26ce3b191bd687adfa9b1e10

Created November 9, 2017 01:25

PB Recycling UID test

	function allStorageGet(callback, key) {
	var storage = (browser.storage \|\| {}).sync;
	var fn = (typeof callback === 'function') ? callback : (function () {});

	// Test whether a string is enclosed by `{}`.
	function isObjectStr(str) {
	return /^{[\s\S]*}$/.test(str);
	}

	function parseLocalStorage() {

Dennis Baldwin dbaldwin