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Metal case for duplex hotspot
Unlike the “Jumbospot” most duplex MMDVM hotspots are not sold in a case. You simply get the “modem” board and normally need to buy a Raspberry Pi and case separately. I’ve tried making my own case...
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Non-invasive GD-77 debugger connections
I wanted to connect a hardware debugger into another of my Radioddity GD-77s, but didn’t want to drill a hole in the side like I did on one of the radios… But I then realised that the rubber...
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Ghidra
m22_ghidra_psoec gd_77_ramdumpI suspect a lot of you are thinking, what on earth is Ghidra Well, that was my thought 2 days ago, when I was informed by Kai, DG4KLU that a open source reverse...
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Nextion display problems
I’ve been experimenting with various ways to display information on my PiStar based hotspot, including the small OLED displays. I found the the OLED is to far to small, so I splashed out and bought...
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MMDVM hotspot – hardware network switch
Several months ago, John VK4JWT asked me if I knew of a way to switch his JumbSpot between Brandmeister and DMR Marc using some sort of physical switch. John was interested in this feature, because he...
View ArticleTTGO T5 eInk display – update
In the last few days I’ve been attempting to resolve a major design fault on the TTGo T5 eInk display board, where the battery management chip (IP5306) was completely turning off the power to the...
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TTGO T5 2.9inch e-Ink display with ESP32 MCU
e-Ink, also known as e-Paper displays have become a lot more affordable in the last year, with several Chinese companies selling modules with or without a built in mircocontroller, so I finally decided...
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LiPo battery charging from a 1W 5V solar panel
In my previous post, I reviewed some “5V 1W” solar panels, with a view to using them to power some IoT devices, and in this post I’ll show my experiments and conclusions about using the panel to charge...
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Cheap “5V 1W” solar panel
I’ve been investigating solar power options for some external monitoring devices, so I invested in three (3) “5V 1W” solar panels from eBay, the amazing price of $1.69 AUD each (around $1.20 USD or...
View ArticleOpenGD77 FM DTMF
Thanks to Alex DL4LEX, FM DTMF for the OpenGD77 is now functional —————————– Update 8th November —————————– VK3YNV has been some tests of the DTMF and it looks like the tones are currently...
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OpenGD77 CPS Timeslot assigned to Digital Contacts
With the OpenGD77 firmware Talkgroups are assigned to Channels, and the VFO, using a Rx Group list, however on DMR MARC and DMR+ networks, different TalkGroups operate on different Timeslots....
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OpenGD77 Tx power display and controls
I’ve added a more user friendly power display and control system to the OpenGD77 firmware Power display showing 750mW Initially the only way to control the Tx power was to set the raw PA drive level...
View ArticleOpenGD77 forum update issues
The OpenGD77 forum is currently offline, because the update to PHPBB 3.0 failed due to an incompatibility with the PHP version on my hosting. I’m currently trying to resolve this problem
View ArticleOpenGD77 CPS improvements
Some people have reported that the CPS is not automatically detecting the OpenGD77 com port even though the drivers have been loaded. In an attempt to provide a workaround for this instance I’ve...
View ArticleOpenGD77.com
Announcing www.opengd77.com a forum for OpenGD77 users With the large number of operators installing the OpenGD77 firmware, managing feedback from everyone has become difficult so I’ve decided to...
View ArticleOpenGD77 Tier2 – Hotspot update
Some problems were found by several people with the initial test version 0.0.7 so all testers should update to the latest version 0.0.71 and retest Some, but not all problems that people reported seem...
View ArticleOpenGD77 featured in Practical Wireless
If anyone has a copy of the December edition of Practical Wireless, I’d be interested to know what they wrote about the OpenGD77 project PW have not been in contact with me, or with Kai (as far as I’m...
View ArticleOpenGD77 Hotspot testers needed
I have now integrated the Hotspot functionality from the Tier 1 version of the OpenGD77 firmware, into the Tier2 version, and I am looking for responsible beta testers. I’ve been running the one of my...
View ArticleOpenGD77 DTMF deviation fix etc
Thanks to Alex DL4LEX the problem with DTMF and 1750Hz Tone burst deviation has now been fixed Actually its been a group effort… Alex made some changes which I’ve manually incorporated into the master...
View ArticleOpenGD77 DTMF deviation and speaker volume
There are currently some problems with the DTMF and 1750Hz Tone deviation, and the DTMF and tone audible feedback through the speaker is too loud Ray VK3YNV emailed me to say that the DTMF deviation...
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