OpenGD77.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...
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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...
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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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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...
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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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...
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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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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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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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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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