send_aprs.py

#!/usr/bin/env python3
# coding: utf-8

import os
import sys
import time
import argparse
from js8net import *

# Main program.
if __name__ == "__main__":
    parser=argparse.ArgumentParser(description="Send APRS message via JS8Call.")
    parser.add_argument("--js8-host",default=False,help="IP/DNS of JS8Call server (default localhost, env: JS8HOST)")
    parser.add_argument("--js8-port",default=False,help="TCP port of JS8Call server (default 2442, env: JS8PORT)")
    parser.add_argument("--call",default=False,help="Destination callsign")
    parser.add_argument("--msg",default=False,help="Message to send")
    parser.add_argument("--freq",default=False,help="Specify transmit freq (hz, ex: 7079000)")
    parser.add_argument("--freq-dial",default=False,help="Specify dial freq (hz, ex: 7078000)")
    parser.add_argument("--freq-audio",default=False,help="Specify transmit offset freq (hz, ex: 1000)")
    parser.add_argument("--speed",default=False,help="Specify transmit speed (slow==4, normal==0, fast==1, turbo==2)")
    parser.add_argument("--env",default=False,action="store_true",help="Use environment variables (cli options override)")
    parser.add_argument("--verbose",default=False,action="store_true",help="Lots of status messages")
    args=parser.parse_args()

    js8host=False
    js8port=False

    # If the user specified a command-line flag, that takes
    # priority. If they also specified --env, any parameters they did
    # not specify explicit flags for, try to grab from the
    # environment.
    if(args.js8_host):
        js8host=args.js8_host
    elif(os.environ.get("JS8HOST") and args.env):
        js8host=os.environ.get("JS8HOST")
    else:
        js8host="localhost"

    if(args.js8_port):
        js8port=int(args.js8_port)
    elif(os.environ.get("JS8PORT") and args.env):
        js8port=int(os.environ.get("JS8PORT"))
    else:
        js8port=2442

    if(not(args.msg and args.call)):
        print("--msg and --call are mandatory")
    else:
        if(args.verbose):
            print("Connecting to JS8Call...")
        start_net(js8host,js8port)
        if(args.verbose):
            print("Connected.")
        if(args.freq or args.freq_dial or args.freq_audio):
            f=get_freq()
            if(args.freq_dial and args.freq_audio):
                set_freq(args.freq_dial,args.freq_audio)
            elif(args.freq and args.freq_audio):
                set_freq(args.freq_dial-args.freq_audio,args.freq_audio)
            elif(args.freq):
                set_freq(args.freq_dial-1000,1000)
            elif(args.freq_audio):
                set_freq(f['dial'],args.freq_audio)
        if(args.verbose):
            print("Frequency set to ",get_freq())
        if(args.speed):
            speed=int(args.speed)
            if(speed>=0 and speed<=4 and speed!=3):
                if(args.verbose):
                    print("Setting speed to ",str(speed))
                set_speed(speed)
        send_aprs(args.call,args.msg)
        time.sleep(3)
        if(args.verbose):
            print("Message sent.")