Amateur Radio Callsign AG4OJ

Disclaimer For Complete Website AG4OJ.COM

Last updated January 8th, 2024


The information provided on the complete AG4OJ.COM (, hereafter called “Website, by (“I, “Me, or “My”) is for general informational purposes only. All information on this Website is provided in good faith, however I make no representation or warranty of any kind, express or implied, regarding the accuracy, adequacy, validity, reliability, availability or completeness of any information on this Website.
Under no circumstance shall I have any liability to YOU for any loss or damage of any kind incurred as a result of the use of this Website or reliance on any information provided on this Website. YOUR use of this Website and YOUR reliance on any information on this Website is solely at YOUR own risk.
If YOUR not into learning things and figuring thing out on YOUR own when they go wrong, then this Website is NOT for YOU. The Raspberry Pi OS, Pi-Star, the Display Driver, MMDVMHost, MMDVM Modem Firmware, and all other related software shown on this Website are developing environments that are out of the control of those who help maintain this Website.
Let it be known that historical documentation has been kept on these projects contained on this website. These Nextion Code projects started in June 2019. All back version are kept for legal history documentation use only. This is done due to provide a history of code progression in the Nextion Displays, and, since January 2022, the Enhanced Display Driver. It is documentation like this that has eased my legal burden in some instances.
Changes may happen in these developing environments that are not immediately reflected in this Website.
This includes all files, images, and documentation located within these webpages. Make sure you have FULLY studied the information presented. This so WHEN something goes wrong, not IF, that YOU are ready to handle your situation on YOUR OWN. I can't be avaliable 24 hours a day, 7 days a week for this. All information on this website is carefully laid out for YOU to learn from.
DO NOT EVER download any of My files from another website. A Ham did this on 04/29/20, they learned a valuable lesson, their Nextion Display was temporally bricked. I got that one Nextion Display back working again, yet, don't take any chances. Get them from HERE!
There will never be a charge for what I provide here or will it be code for a commercially made hotspots only. SO PLEASE, get ALL of My files directly from this site, ONLY. Use the checksums files that I provide. If any file doesn't pass a checksum test after downloading it, THEN DON'T USE IT! Email me about it.

The User Databases Offered On This Website

It has been brought to My attention that user databases like what is offered on this Website must be handled privately. As YOUR Nextion Display can show other user information, it's in YOUR best interests that it is NOT done so in a PUBLIC WAY. Certain international LEGAL authorities that I have deferred to, have so stated, it's in everyone's best interests NOT to display other user's information in ANY PUBLIC WAY.
This means NO public images, pictures, videos, etc. of the Nextion Display displaying user information.
Use of the user databases on this website are at YOUR own risk. YOU are hereby warned that there are certain countries that offer legal remedies to citizens when they feel that their privacy has been violated. NOW, We know this is a high bar to prove, YET, legal costs to defend YOURSELF in such a situation may not be something easily dismissed with empty pockets.
Private Amateur Radio Use Of These Databases Are Deemed Harmless

The Legalities Of Free Software

Ive done My best to compile these files, the ones presented on this Website, by the latest Nextion GUI version. Even so, the risk of using these files falls solely on those who download them and install them. There could be errors in the code, omissions, may not work completely, and/or work at all. Like I have said, Ive done the best I can.
Since Im not in control of the downloading and installing of the correct file to the correct display, YOU, the end user accepts ALL responsibility for anything that could just happen to go wrong when programming/reprogramming YOUR Nextion Display. Though downloading and installing is usually flawless, unexpected things can still happen. KARMA?! Murphy's LAW?!
Also, I cant control if the associated driver, NDDC or EDDC, is installed properly. Even though there are a set of installation instructions, as installation guides provided here on this Website, certain settings need to be setup properly before they are installed. Then afterwards, if certain settings are changed within Pi-Star / MMDVMHost, this could cause the Nextion Display to completely or partially stop working.
I share My code files here with everyone “COPYRIGHT FREE USE ONLY”. This code has My permission to be installed on ANY Amateur Radio MMDVM Hotspot (Single/Simplex) / Repeater (Dual/Duplex) Nextion Display. I Dont give permission for any form of the code to be disassembled, reverse-engineered, and/or sources copied, sources partially copied into other projects without My expressed written permission.
This means that they may be installed on a single device or commercially sold in bulk devices without any further direct permissions from Me. AND, this means that the warranty of any sold such devices using these code files from this Website then belongs solely between the seller and buyer. I'm making no money off the complete contents provided on this Website or the sale of any Hotspots / Repeaters. I can't and WILL NOT be involved in ANY WARRANTY ISSUES of said sold devices.

Warranty, Fitness of Provided Code

Ok, there is NONE, Sorry. You're mostly on your own to study the presented materials and figure things out. I provide an Email address below to ask questions and to help resolve any problems. I will try My best to get you a resolution quickly. As I'm not selling anything here, this Website is informative only. This Website is to be used as an aid to increase Your knowledge of how things work in and around the Pi-Star environment.


There will be NO Banners, Ads, or any other kind of advertising on this Website. Such links can't be completely controlled by Me and these days can be unknowingly be linked to scams and relentless spam. In saying such, NO Banner ads or unrelated product links will EVER be found on this Website.

Product Related External Links DISCLAIMER

This Website does contain product related links to other websites or content belonging to originating third parties. Such external links are not investigated, monitored, or checked for accuracy, adequacy, validity, reliability, availability or completeness by Me.
I do not warrant, endorse, guarantee, or assume responsibility for the accuracy or reliability of any information offered by third-party product websites linked throughout this Website. I will not be a party to or in any way be responsible for monitoring any transaction between you and third-party providers of product links on this Website.

Professional DISCLAIMER

This Website cannot and does not contain any medical, legal, fitness, or health advice/services. The information on this Website is provided for general informational and educational purposes only. It is not a substitute for any professional or professionally paid for advice.
Accordingly, before taking any actions based upon any such information here, I encourage you to do your own diligent research and, where / when necessary, to consult privately with the appropriate professionals. The use or reliance of any information contained on this Website is solely at your own risk.


This Website contains links to websites to parts for building HotSpot / Repeaters. I DO NOT receive ANY affiliate commissions for any purchases made by you on such website links. Presently I have NO affiliations. I ONLY have professional courtesy relationships with others and suppliers.
Im NOT a participant in the AMAZON Services LLC Associates Program, an affiliate advertising program designed to provide a means for Me to earn advertising fees by linking to and affiliated websites. Some AMAZON short links are used on this website for suggestions to HotSpot / Repeaters parts.
There are NO extraneous Website Banner ADS anywhere on this Website. I don't use Website ads, this means that there is NO money made by Me throughout Your use of this website. THANK YOU for visiting My AD FREE, completely FREE to use Website.

Testimonials DISCLAIMER

This Website DOES NOT contain ANY testimonials by users of My FREELY GIVEN INFORMATION AND FILES. Testimonials reflect the real-life experiences and opinions of users. However, the experiences are personal to those particular users and may not necessarily be representative of all users of My FREELY GIVEN INFORMATION AND FILES. I do not claim, and nor should you assume, that all users will have the same experiences. Your individual results may vary.
Testimonials on OTHER Websites, including social media sites, are submitted by others not related to this website in various forms such as text, images, audio and/or video. Those Testimonials are NOT reviewed or controlled by Me in any way. They appear on the OTHER Websites as given by those users, to include any NON-correction of grammar, typing errors, and/or erroneous information.
Some of those testimonials may even become edited, added too by those / other users where the testimonial may have contain correct or erroneous information that changed in some way. And then, they may have added more erroneous, incorrect information to it. I don't control such testimonials, nor will I comment on them.
The views and opinions contained in those testimonials belong solely to the individual(s) that posted them, added to them, and they may not reflect My views and opinions, in whole or part. Im not affiliated with those users who publish those testimonials. They are not paid or otherwise compensated to publish their testimonials by Me in any way. Any biased opinions are their own without any influence by Me.
The testimonials on those OTHER Websites should not be intended, nor should they be construed, as claims that My FREELY GIVEN INFORMATION AND FILES are better/worse than any other such information and/or files on the same subjects elsewhere. ALWAYS make sure that you are well versed in the subjects that You are about to endeavor in, thus as you learn, put into practice, and finally master them.