Battery LED w/ Teensy LC

[WIP]

Introduction

This "Project Guide" is written to show some of the capabilites of NavQ. In conjunction with a Teensy LC and a strip of WS2812B LEDs, you can add a forward-facing battery indicator light to your drone.

The battery on my drone is quite low!

Prerequisites

Software

The software needed to run this project on your NavQ is as follows:

1. ROS Noetic

2. MAVROS

You can install this software using the guides here:

ROS1Controlling your drone from NavQ using MAVROS

Hardware

The hardware needed is the same as the hardware from the I2C guide here:

I2C

Code

At the moment, we're just going to paste the code here, and a more detailed guide will be written later.

Teensy code

This code should be uploaded to the Teensy using the Arduino IDE.

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batt_led.zip

archive

Teensy batt_led code

NavQ code

The ROS node should be placed in the home folder ('/home/navq/')

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batt_led.py

ROS node

The service file should be located in /etc/systemd/system/.

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batt_led.service

"systemd" service file

The Launch script should be located in /usr/local/bin/.

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batt_led.sh

Launch script

Making the ROS node run on boot

Once all of the necessary files are placed in their respective directories, you need to make the systemd service run at boot. To do this, run in the terminal:

$ sudo systemctl enable batt_led