Once upon a time somewhere in 2015 i bought a couple of these little converters RS232 tot TTL.
Here is how they work
From the RS232 Port – RX, TX and GND. Thats the -> -<and the – signs. Easy enough
On the TTL (Arduino) side – DO NOT USE 5V use 3.3V as this toasts the device and heats up and like tops itself. It certainly got very toasty when I put 5V across it. This could be because I messed up somewhere in the wiring but it certainly works well for me. I can also use the SoftwareSerial library as well so I don’t need to use TX/RX on the TTL Serial pins 0 and 1
So TTL is
-> – PIN X
<- PIN Y
For my device I used PIN 0 and PIN 1 – TX/RX – but I guess you can use other pins.
Just before years end i have compiled the latest OpenWRT LEDE & APRX, and added OpenVPN and OpenSSL to it. The files can be found in the download section. If you have another router, then drop me a line, or call me at DMR at 204 / 2044 or 2045.
As of 28 Juli 2016, I have PA0ESH-3 up and running as a dxcluster, using dxspider as software.
The cluster runs on a liteserver housed in Assen The Netherlands with an uptime of more than 99%.
Soon I will also implement a webbed display of the spots here.
you can reach the cluster at www.pa0esh.com and port 7300
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