A runnable firmware for the RT-880, it doesn't do anything other than a hard coded scan of the airband.
This is obviously not meant for use, it's to compare the behaviour of different radios....
2025-06-30 20:02:33 +0000 UTC View PostProgress is moving along steadily, more and more core functions are getting knocked out each day. That said, this is a full rewrite, so don’t expect Barry Allen-level speeds just yet. 😅
...
2025-06-30 11:29:54 +0000 UTC View PostWhen you're working with unknowns.
GPIO 4 when set HIGH engages the filter not LOW,
I meant that GPIO-5 engages the UHF filter.
2025-06-29 01:03:44 +0000 UTC View PostNote: The frequency the radio is tuned to is 433.55000 not 430.55000 which is why the H3 is showing 433.55000. Sorry about that, the text on the 880 is just printed and I forgot to change it. 2025-06-28 23:48:10 +0000 UTC View Post
Well that was a journey, had to write a whole separate app to convert fonts to something usable. But now, we're sporting a 24x32 font right there.
I know right now it doesn't seem like a much...
2025-06-28 16:43:14 +0000 UTC View Post
One of the advantages of being a coder is that you can make a computer do anything you want it to, it just takes a little bit of effort. But damn, why isn't there a single app out there that can co...
2025-06-28 02:48:24 +0000 UTC View PostThis is a better display, 240x320, and its physical width is about the same as the RT-900's screen which is 160x128. This means the RT-880 has a finer dot pitch, as a result 16x16 fonts will appear...
2025-06-27 16:05:37 +0000 UTC View PostStill far from a usable firmware but I'm getting peripheral usage down one by one. Remember I have absolutely no reference at all to work from, so this is way more of a grind.
Update: Now got...
2025-06-26 18:28:08 +0000 UTC View PostThis may look pretty trivial but it's not, getting to this stage is a huge relief.
The TD-H3 was an 8051 based device, not exactly difficult to work out, it's a very simplistic MCU compared ...
2025-06-24 08:06:46 +0000 UTC View PostI do not like the self contained application firmware flasher Radtel supply at all. The biggest worry I have about it is that it requests Admin rights to run.
To review change logs, please read all prior release posts, each one has release notes that describe new features, changes and the like.
There is nothing of note ...
2025-06-22 19:53:47 +0000 UTC View PostThis release is just the firmware file. To obtain the compatible programmer, download the one supplied with release 2.52.15 2025-06-22 19:49:49 +0000 UTC View Post
Development Update: Transitioning Focus to the RT-880
As I shift my development efforts to the RT-880, it’s time to draw a line under the TD-H3 and RT-900; at least for now...
2025-06-22 09:28:30 +0000 UTC View Post
Use with previous programmer released [HERE]
Single feature release, request made by r...
2025-06-18 15:48:02 +0000 UTC View PostHere are the online TD-H3 tools for firmware flashing and codeplug burning/backup.
I have also included the default codeplug (required to be written first time) as a download here and i...
Use with 2.52.15 Programmer [HERE]
Fixes a bug reported in community chat that locks the radio up after...
2025-06-17 08:39:32 +0000 UTC View PostHere's the email I just sent to Radtel. Hopefully they'll respond positively. If not we've got a bit of a journey figuring out the IO on this RT-880 and I'll likely need to ask for community suppor...
2025-06-16 13:07:40 +0000 UTC View PostUse with previous release SPI App [HERE] This update includes just one change, but it’s a meaningful one that improves both reliability and
Use with previous release SPI App 2025-06-16 11:22:34 +0000 UTC View Post
Since Patreon's posting system is woefully bad for posting code, I've included this info as a downloadable txt document as well.
The RT-900 uses a baud rate of 57600...
2025-06-15 09:50:27 +0000 UTC View PostThis is a specific release; a request by member: เอกชัย ทรัพย์ทิพย์
Use with 2.52.15 Programmer 2025-06-15 09:42:00 +0000 UTC View Post
Just some info that might save a few headaches.
2025-06-15 00:46:37 +0000 UTC View PostThis is a specific release; a request by member: เอกชัย ทรัพย์ทิพย์ notifications have not been turned on. Incorporates a VFO status system
This ...
2025-06-14 19:54:57 +0000 UTC View Post
Added User/Advanced menu split.
Note: Since the 900 does not need a CRC check I used the bottom side button to switch between user and advanced menus on that radio. ...
First of the RT-900 backport releases.
Added Scramble feature and DTMF decoding/fleet ID.
Check the Scrambler menu after flashing to make sure it doesn't set itself to a random value.
Use with SPI Flash App V4.00.20 [Previous Release] This is a minor, single-feature update. Notifications have not been enabled for this post
Use with SPI Flash App V4.00.2...
2025-06-11 21:44:32 +0000 UTC View Post
Hi everyone,
I wanted to take a moment to share some thoughts on the current direction of development and what's coming next. There are several exciting possibilities on the horizon, and I’...
2025-06-09 17:37:06 +0000 UTC View PostA quick demonstration of how DTMF Speed Dialing works.
2025-06-07 18:01:47 +0000 UTC View PostPlease read the pre-release post [HERE] for the new programmable key action defaults. Since I had to insert two keys into the action tables,