<code python>
TRUE = 1
FALSE = 0
import SER
import MOD
import MDM
import GPS
import GPIO

global nofix_count
global status
global log_count
track_count = 0
log_count = 0
nofix_count = 0
maxalt = 0

def reset_gps():
    MDM.send('AT$GPSR=1\r', 0)
    temp = MDM.receive(1)
    
def debugmsg(msgtext):
    msgtext = msgtext.replace('\r', '\\r')
    msgtext = msgtext.replace('\n', '\\n')
    SER.send(msgtext + '\r\n')
    
#GPS status
def gps_status(gpspos):
    debugmsg('Retrieving GPS status')

    gpspos_parts = gpspos.split(',')

    if gpspos_parts[5] == '2' or gpspos_parts[5] == '3': #2D or 3D fix
        debugmsg('GPS fix "' + gpspos_parts[5] + '" ie valid');
        status = TRUE
    else:
        debugmsg('GPS fix "' + gpspos_parts[5] + '" ie not valid');
        status = FALSE

    return status
    
def gps_nofix(gpspos):
    global nofix_count
    gpspos_parts = gpspos.split(',')

    if gpspos_parts[5] == '2' or gpspos_parts[5] == '3': #2D or 3D fix
        nofix_count = 0
    else:
        nofix_count += 1
        
    if (gpspos_parts[10] == '00'):
        nofix_count = nofix_count + 1
    else:
        nofix_count = 0
    
    if nofix_count > 20:
            debugmsg('Resetting GPS')
            reset_gps()
            nofix_count = 0
    debugmsg('No Fix Count: %d ' % nofix_count)
    
#SMS Send
def sms_send(to, text): 
    MDM.send('AT+CMGS="' + to + '"\r', 0)
    res = MDM.receive(50)#5 sec
    MOD.sleep(1)#wait 0.1sec
 
    #Check for SMS prompt
    if res == '\r\n> ':
 
        #Send SMS message text
        MDM.send(text, 0)
 
        #End SMS
        MDM.sendbyte(0x1A, 0)
        res2 = MDM.receive(180)#5 sec
        MOD.sleep(1)#wait 0.1sec
 
        if '\r\nOK\r\n' in res2:

            status = TRUE
 
        else:
            status = FALSE
            MDM.receive(1); # may prevent +CMS ERROR: 331 crash
 
    else:
        #Abort SMS (just in case)
        MDM.sendbyte(0x1B, 0)
        MOD.sleep(1)#wait 0.1sec
 
        status = FALSE
 
    return status
    
#Setup SMS
def sms_setup():
    MDM.send('AT+CMGF=1\r', 0)
    res = MDM.receive(50)#5 sec
    MOD.sleep(1)#wait 0.1sec
    
def cutdown(alt):
    debugmsg('Check Altitude')
    alt_temp = alt.split('.')
    debugmsg(alt_temp[0])
    alt_int = int(alt_temp[0])
    if alt_int > 5000:
        debugmsg('Cutdown')
        GPIO.setIOvalue(4, 1)
        MOD.sleep(30)
        GPIO.setIOvalue(4, 0)
    else:
        debugmsg('Still Below 5000m')
   
        
def camera():
        GPIO.setIOvalue(6, 1)
        MOD.sleep(10)
        GPIO.setIOvalue(6, 0)

def radio_on_of(on_off):
    if on_off == 'on':
        debugmsg('Radio on')
        GPIO.setIOvalue(7, 0) 
    elif on_off == 'off':
        debugmsg('Radio off')
        GPIO.setIOvalue(7, 1)

def dit():
    MOD.sleep(2)
    GPIO.setIOvalue(3, 1)
    MOD.sleep(1)
    GPIO.setIOvalue(3,0)

def dash():
    MOD.sleep(2)
    GPIO.setIOvalue(3, 1)
    MOD.sleep(2)
    GPIO.setIOvalue(3,0)
    
def morse_code(number):
    MOD.sleep(3)
    if number == '.':
        debugmsg('Dot')
    elif number == 'N':
        debugmsg('N')
    elif number == 'S':
        debugmsg('S')
    elif number == 'E':
        debugmsg('E')
    elif number == 'W':
        debugmsg('W')
    elif number == '-':
        debugmsg('-')
        dit()
        dash()
        dit()
    else:
        int_number = int(number)
        debugmsg('%d' % int_number)
        if int_number == 0:
            dash()
            dash()
        elif int_number == 1:
            dit()
        elif int_number == 2:
            dit()
            dit()
        elif int_number == 3:
            dit()
            dit()
            dit()
        elif int_number == 4:
            dit()
            dit()
            dit()
            dit()
        elif int_number == 5:
            dash()
        elif int_number == 6:
            dash()
            dit()
        elif int_number == 7:
            dash()
            dit()
            dit()
        elif int_number == 8:
            dash()
            dit()
            dit()
            dit()
        elif int_number == 9:
            dash()
            dit()
            dit()
            dit()
            dit()
        else:
            debugmsg('Not between 0 and 9')
    
def morse_splitter(coord):
    debugmsg(coord)
    for x in coord:
        morse_code(x)

def log_data(data):
    global log_count
    if log_count > 5:
        debugmsg('writing to log file')
        file = open('data.txt','a')
        file.write(data)
        file.close()
        log_count = 0
    else:
        debugmsg('no writing to log file')
        log_count += 1
        
debugmsg('Running...');
gpspos_lastvalid = ''
sms_setup()
#Main loop
while TRUE:
        debugmsg('Entering loop')
        debugmsg('Click')
        camera()
        #Retrieve current position
        gpspos = GPS.getActualPosition()

        debugmsg('Position: %s' % gpspos)

        #Retrieve GPS fix status
        gps_statusnow = gps_status(gpspos)

        #Save last valid position
        #If position fix valid, or none recorded already, use last retrieved
        if gps_statusnow == TRUE or gpspos_lastvalid == '':
            gpspos_lastvalid = gpspos
        debugmsg('3')
        gps_nofix(gpspos)

        #If GPS position fix valid
        if gps_status(gpspos) == TRUE:
            GPIO.setIOdir(1, 1, 1)
            gpsdataparts = gpspos.split(',')
            senddata = 'T:' + gpsdataparts[0] + ',Lat:' + gpsdataparts[1] + ',Lon:' + gpsdataparts[2] + ',Alt:' + gpsdataparts[4] + ',H:' + gpsdataparts[6] + ',S:' + gpsdataparts[7] + 'km/hr'
            cutdown(gpsdataparts[4])
            #Morse code
            radio_on_of("on")
            MOD.sleep(10)
            morse_splitter(gpsdataparts[1])
            MOD.sleep(10)
            morse_splitter(gpsdataparts[2])
            MOD.sleep(10)
            morse_splitter(gpsdataparts[4])
            radio_on_of("off")
            if gpsdataparts[4] > maxalt:
                maxalt = gpsdataparts[4]
            debugmsg(maxalt)
        else:
            GPIO.setIOdir(1, 0, 1)
            radio_on_of("on")
            GPIO.setIOvalue(3, 1)
            MOD.sleep(50)
            GPIO.setIOvalue(3,0)
            radio_on_of("off")
            senddata = 'NF' + gpspos_lastvalid
        
        debugmsg(senddata)
        debugmsg('Sending Text')
        #sms_send('xxxxxxxxx', senddata)
        if track_count > 3:
            senddata_bot = 'track@natrium42.com N:firefly,' + senddata
            #sms_send('07766404142', senddata_bot)
            debugmsg(senddata_bot)
            track_count = 0
        else:
            track_count += 1
        log_data(senddata)
        debugmsg('Powersave for 45 seconds')
        MOD.powerSaving(45) 
</code>