Revision of aprs.go

Lucas Teske revised this gist 7 years ago. Go to revision

1 file changed, 18 insertions, 1 deletion

aprs.go

			@@ -20,6 +20,7 @@ const passcode = "123456"
20	20		const notifyMessage = "HUEBR"
21	21
22	22		const SendInterval = time.Second * 60 * 5
	23	+	const ReconnectInterval = time.Minute * 30
23	24
24	25		var myCoordinate = []float32{-23.640000,-46.650000}
25	26
			@@ -107,7 +108,7 @@ func sendMessage(conn net.Conn, msg string) {
107	108		}
108	109		}
109	110
110		-	func main() {
	111	+	func connect() (net.Conn, *bufio.Reader) {
111	112		log.Printf("-- Connecting to %s:%d\n", server, port)
112	113		conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", server, port))
113	114
			@@ -133,6 +134,15 @@ func main() {
133	134		panic(err)
134	135		}
135	136
	137	+	return conn, reader
	138	+	}
	139	+
	140	+	func main() {
	141	+	log.Printf("-- Restart Time: %s\n", ReconnectInterval)
	142	+	log.Printf("-- Send Interval: %s\n", SendInterval)
	143	+	connectTime := time.Now()
	144	+	conn, reader := connect()
	145	+
136	146		log.Println("-- Receiving messages")
137	147		for {
138	148		line, _, err := reader.ReadLine()
			@@ -145,5 +155,12 @@ func main() {
145	155		sendPosition(conn)
146	156		lastCoordinateSent = time.Now()
147	157		}
	158	+
	159	+	if time.Since(connectTime) > ReconnectInterval {
	160	+	log.Println("-- Reconnect time exceeded. Reconnecting")
	161	+	_ = conn.Close()
	162	+	conn, reader = connect()
	163	+	connectTime = time.Now()
	164	+	}
148	165		}
149	166		}

Lucas Teske revised this gist 7 years ago. Go to revision

1 file changed, 149 insertions

aprs.go(file created)

		@@ -0,0 +1,149 @@
1	+	package main
2	+
3	+	import (
4	+	"bufio"
5	+	"fmt"
6	+	"log"
7	+	"net"
8	+	"strings"
9	+	"time"
10	+	)
11	+
12	+	const server = "euro.aprs2.net"
13	+	const port = 14580
14	+
15	+	const softwareName = "goaprs"
16	+	const softwareVersion = "0.1"
17	+
18	+	const callsign = "PU2NVX"
19	+	const passcode = "123456"
20	+	const notifyMessage = "HUEBR"
21	+
22	+	const SendInterval = time.Second * 60 * 5
23	+
24	+	var myCoordinate = []float32{-23.640000,-46.650000}
25	+
26	+	var lastCoordinateSent time.Time
27	+
28	+	var loggedIn = false
29	+
30	+	func Degrees2DMS(val float32) (deg int, min float32, n string) {
31	+	n = "+"
32	+	if val < 0 {
33	+	val = -val
34	+	n = "-"
35	+	}
36	+
37	+	deg = int(val)
38	+	val -= float32(deg)
39	+	val *= 60
40	+	min = val
41	+
42	+	return
43	+	}
44	+
45	+	func buildMessage(callsign, passcode, cmd string) string {
46	+	return fmt.Sprintf("user %s pass %s vers %s %s %s", callsign, passcode, softwareName, softwareVersion, cmd)
47	+	}
48	+
49	+	func parseAPRS(msg string, conn net.Conn) {
50	+	log.Printf("<- APRS: %s\n", msg)
51	+	}
52	+
53	+	func parseServer(msg string, conn net.Conn) {
54	+	log.Printf("<- SERVER: %s\n", msg)
55	+	if strings.Index(msg, "verified") > -1 {
56	+	log.Printf("-- Logged in as %s\n", callsign)
57	+
58	+	sendPosition(conn)
59	+	lastCoordinateSent = time.Now()
60	+
61	+	loggedIn = true
62	+	}
63	+	}
64	+
65	+	func parseMessage(msg string, conn net.Conn) {
66	+	if string(msg[0]) == "#" {
67	+	// Server Message
68	+	parseServer(msg[2:], conn)
69	+	return
70	+	}
71	+
72	+	parseAPRS(msg, conn)
73	+	}
74	+
75	+	func formatPosition() string {
76	+	lat := myCoordinate[0]
77	+	lon := myCoordinate[1]
78	+
79	+	latDeg, latMin, latV := Degrees2DMS(lat)
80	+	lonDeg, lonMin, lonV := Degrees2DMS(lon)
81	+
82	+	if latV == "-" {
83	+	latV = "S"
84	+	} else {
85	+	latV = "N"
86	+	}
87	+	if lonV == "-" {
88	+	lonV = "W"
89	+	} else {
90	+	lonV = "E"
91	+	}
92	+
93	+	return fmt.Sprintf("%02d%02.2f%s/%03d%02.2f%s-000/000/A=000000", latDeg, latMin, latV, lonDeg, lonMin, lonV)
94	+	}
95	+
96	+	func sendPosition(conn net.Conn) {
97	+	log.Println("-- Sending Position")
98	+	sendMessage(conn, buildMessage(callsign, passcode, "")) // First Line
99	+	sendMessage(conn, fmt.Sprintf("%s>APDR15,TCPIP*:=%s %s", callsign, formatPosition(), notifyMessage))
100	+	}
101	+
102	+	func sendMessage(conn net.Conn, msg string) {
103	+	log.Printf("-> %s\n" ,msg)
104	+	_, err := conn.Write([]byte(msg + "\n"))
105	+	if err != nil {
106	+	panic(err)
107	+	}
108	+	}
109	+
110	+	func main() {
111	+	log.Printf("-- Connecting to %s:%d\n", server, port)
112	+	conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", server, port))
113	+
114	+	if err != nil {
115	+	panic(err)
116	+	}
117	+
118	+	reader := bufio.NewReader(conn)
119	+	time.Sleep(1 * time.Second)
120	+	line, _, err := reader.ReadLine()
121	+
122	+	if err != nil {
123	+	panic(err)
124	+	}
125	+	log.Printf("<- %s\n", string(line))
126	+
127	+	log.Println("-- Connected. Sending Login")
128	+
129	+	msg := buildMessage(callsign, passcode, fmt.Sprintf("filter r/%f/%f/%d", myCoordinate[0], myCoordinate[1], 50))
130	+	sendMessage(conn, msg)
131	+
132	+	if err != nil {
133	+	panic(err)
134	+	}
135	+
136	+	log.Println("-- Receiving messages")
137	+	for {
138	+	line, _, err := reader.ReadLine()
139	+	if err != nil {
140	+	panic(err)
141	+	}
142	+	parseMessage(string(line), conn)
143	+
144	+	if time.Since(lastCoordinateSent) > SendInterval && loggedIn {
145	+	sendPosition(conn)
146	+	lastCoordinateSent = time.Now()
147	+	}
148	+	}
149	+	}

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