Dashboard for RaspPi-controlled toy sailboat with Node-RED
Mobile Controller
The final step, enabling a smartphone or tablet to connect to the Raspberry Pi, can be accomplished either by making the Raspberry Pi a WiFi access point or by tethering the Pi to a cell phone. You can find some great guides online on how to set up a Raspberry Pi as an access point (e.g., the Raspberry Pi Foundation website [5]). For this project, we used the simple tethering method. Once the Pi is tethered to a phone, the Pi's IP address can be obtained from the Wi-Fi hotspot users list on an Android device (Figure 8). The Node-RED dashboard is accessed on your phone with http://<pi_ip_address>:1880/ui (Figure 9). Assuming everything is connected correctly, you should be able to control the sailboat with your phone.
Summary
Once you have mastered the basic Node-RED programming and sailboat construction, other projects are possible, such as motor boats, iceboats, and airboats [6].
Infos
- Node-RED: https://nodered.org
- K'Nex: https://www.knex.com
- TowerPro SG90: http://www.towerpro.com.tw/product/sg90-7/
- "Create amazing Pi apps without writing code" by Leah, Brooke, and Pete Metcalfe, Raspberry Pi Geek, issue 20, 2016, pg. 90, http://www.raspberry-pi-geek.com/Archive/2016/20/Create-amazing-Pi-apps-without-writing-code
- Raspberry Pi as an access point: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md
- "Use your smartphone to control an airboat" by Leah, Brooke, and Pete Metcalfe, Raspberry Pi Geek, issue 11, 2015, pg. 94, http://www.raspberry-pi-geek.com/Archive/2015/11/Use-your-smartphone-to-control-an-airboat
« Previous 1 2
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
Direct Download
Read full article as PDF:
Price $2.95
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you've found an article to be beneficial.
News
-
Armbian 23.05 is Now Available
Based on Debian 12, the latest version of the ARM/RISC-V distribution is now available to download and install.
-
Linux Mint Finally Receiving Support for Gestures
If you use the Linux Mint Cinnamon desktop, you'll be thrilled to know that 21.2 is getting support for gestures on touchscreen devices and touchpads.
-
An All-Snap Version of Ubuntu is In The Works
Along with the standard deb version of the open-source operating system, Canonical will release an-all snap version.
-
Mageia 9 Beta 2 Ready for Testing
The latest beta of the popular Mageia distribution now includes the latest kernel and plenty of updated applications.
-
KDE Plasma 6 Looks to Bring Basic HDR Support
The KWin piece of KDE Plasma now has HDR support and color management geared for the 6.0 release.
-
Bodhi Linux 7.0 Beta Ready for Testing
The latest iteration of the Bohdi Linux distribution is now available for those who want to experience what's in store and for testing purposes.
-
Changes Coming to Ubuntu PPA Usage
The way you manage Personal Package Archives will be changing with the release of Ubuntu 23.10.
-
AlmaLinux 9.2 Now Available for Download
AlmaLinux has been released and provides a free alternative to upstream Red Hat Enterprise Linux.
-
An Immutable Version of Fedora Is Under Consideration
For anyone who's a fan of using immutable versions of Linux, the Fedora team is currently considering adding a new spin called Fedora Onyx.
-
New Release of Br OS Includes ChatGPT Integration
Br OS 23.04 is now available and is geared specifically toward web content creation.