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Записи о том, как сделать APRS KISS TNC Modem на базе китайской ардуино нано и проекта micromodem

https://unsigned.io/micromodem/

flash

avrdude -c usbasp -P usb -p m328p -U flash:w:microaprs-3v-kiss-latest.hex

board https://aliexpress.ru/item/32832366092.html?spm=a2g0s.9042311.0.0.264d33ed59A3In&_ga=2.151585785.1129748883.1593168073-215828394.1578562924

programmer + adapter https://aliexpress.ru/item/2055099231.html?spm=a2g0s.9042311.0.0.264d33edZYWpLo&_ga=2.76262357.1129748883.1593168073-215828394.1578562924

board pinout https://sun9-49.userapi.com/c857332/v857332621/147316/EGOfI8KifQY.jpg board-pinout

Micro modem schematic https://unsigned.io/wp-content/uploads/2014/12/Schematic-1.pdf Micro-modem scheme

Куда подключаться к плате с алиэкспресс

DAC
d4-d5-d6-d7
8k 4k 2k 1k

led tx pin13 - D9
led rx pin14 - D10

ADC
pin23 pc0 - A0

pro mini board

Board for receive only igate

photo

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osc1

osc2

see also

https://zftlab.org/pages/2015012200.html

https://eax.me/sdr-aprs/

http://goryham.qrz.ru/pr/aprs/dir300b1.htm

Arduino digi

extdigi, an APRS Digipeater for Arduino - http://extradio.sourceforge.net/extdigi.html

https://github.com/ZS6TVB/Arduino-APRS-Digipeater/tree/master/Software/APRS%20Digi

https://github.com/markqvist/MicroDigi

Arduino igate

http://hamradioprojects.com/authors/dl8rds/+airgate/

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Arduino based aprs kiss tnc modem

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