It is very extremely simple and low component count / cost device. I called is as armageddon communicator but I think it can not survive any disaster, I take in focus use only one easy solder MCU and I chose SAMD21E18 in TQFP32 package (same size as popular Atmega328) But with many new features as: -crystal free USB -Mass storage USB bootloader -256Kb flash, 32kb RAM -2xSPI, 1xUART, 1xI2C -48MHz -Low power I making it for fun and learning communication, It is super hi tech walkie talkie, No special manufacturing tools required, all is made with PCB technology, Front panel also cary Backlight LEDs for keyboard = it is no waste of PCB electricity functions Everyday question > "distance" no direct view, some small hills, some houses in village. (Max power, Spread Factor 12) -700m unit on garden desk -1500m unit in window, about 4m above ground -4300m unit in attic window, 10m above ground
ФКД
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