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piGate: APRS Raspberry-Pi | Radioaficion Ham Radio

piGate: APRS Raspberry-Pi

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The key components of piGate are depicted in the diagram below. The VHF FM radio receives the APRS packets and outputs them in form of short bursts of audio tones (APRS uses audio frequency shift keying modulation at 1200baud, listen to a AFSK1200 packet here). The audio is sent to a sound card connected to the Raspberry-Pi. The software running on the Raspberry-Pi reads the audio signal coming into the sound-card, demodulates the signal, decodes the packet and then sends it to an APRS-IS server over the WiFi link.

piGate – an APRS iGate implementation using the Raspberry-Pi

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