OpenGD77

I confirm in my RT3S the problem with the frequency of 438.550 MHz. Many of the Chinese radios with colour screens have some interference from screen updates. This is nothing unique to this firmware. There is not much that can be done to prevent this other than not updating the screen. It is really ...

Hello CU7AAZ. I saw your tutorial. From there I got the link to the module on Aliexpress. My additional module worked without connecting the rxd and 1pps lines, so they are probably unnecessary. I don't want to make such a big mechanical alteration inside to fit it. These modules look pin 2 pin comp...

Hello again. I connected in another GPS module and there is a huge improvement. Original module after 30 minutes power on near window: GPSInternal.jpg And the module purchased here: https://aliexpress.com/item/1005001704030454.html GPSExt01a.jpg It appears that some Jumpstart modules have very poor ...

Hello all. I don't know how you guys accomplished this, but whatever I try, this GPS barely works at my place. Factory, in the flat by the window, facing the GPS antenna towards the sky 0 satellites. As above, but without the RT3s enclosure, so that the antenna is exposed: 2-3 satellites, no fix eve...

OK, I checked carefully. Everything under CPS v 2023.08.18.01 and this laptop. Version 20230509210004 is the last one working correctly. CPS read from RT3s 13 times correctly out of 13 attempts. After each reading I turned off the trx and turned it back on. This is the previous version with which I ...

Hello. I have a problem with this version with uploading codeplug to rt3s. When I press write,read etc in CPS the trx lights up the display, shows the active channel, and hangs. No react to any button. CPS displays error "Error connecting to the radio. I have to switch trx and cps off and on and try...

I used to install the STM DFU driver under Windows 11 from the STM website and there was no problem you write about. It was a driver from the STSW-STM32080 package. You have to provide an email to download it. You must install this STSW-STM32080 software package, and the driver itself has to be inst...