RaspBRadio - A Raspberry Pi and RTL-SDR Based Boombox

Raspberry radio scanner from 0 to 1750MHz

Introduction:
I'm not a python developer, you will find a lot of "strange things" in the code cause it is copy-pasted here and there from the net... but it's working.
Please help improving the code.
Any question or comments will be accepted.
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For this project I have used:

SHARP GF-450 H Boombox - only case, antenna, speakers and a red led remain in place
Raspberry Pi 3 Model B
Nooelec Nano 2
Nooelec Ham It Up v1.3 HF upconverter
TDA2822M audio amplifier - DON'T use PAM8403 cause it produces a lot of interference in HF
KY040 rotary switch
4x4 matrix keyboard
4 lines lcd display
i2c level shifter
various cables and connectors
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Description:
As you can see from pics below, there are 4 rotary switch on the top of the radio, one, on the left, is the potentiometer directly attached to audio amplifier module that receive audio signal through jack-jack cable connected to raspberry.
Other 3 are the ky040 rotary switches, 1st is to go up and down in freq with 500Hz steps and if pushed decrease the squelch level, 2nd is with 5KHz steps and if pushed change demodulation, 3rd with 50KHz steps and if pushed raise the squelch level.
On the right there is a lever, is connected to the upconverter in the place of the original switch and plus select the antenna, the original stylus for frequency above 30MHz or an external antenna for frequency below 30MHz (when upconverted is turned on) with a BNC connector on the right side of the radio.
On the right side there is also power connector, i've just used original raspberry power adapter with a male-female generic dc plug in the middle of the cable cutted and soldered.
Power must reach raspberry, upconverter and audio amplifier.
On the front we can find the lcd, inside, where was the musicassette mechanics, connected to raspberry gpio through a i2c level shifter; and a 4x4 matrix keyboard.
On the back, just as a backup when wifi doesn't work, there is a rj45 female coming from raspberry.
Audio is also streamed on the network thorugh a vlc instance.
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Usage:
use the ky040 to set frequency, squelch and demodulation as described above.
Press 'A' to enter a frequency manually then press '#' to confirm and exit the menu.
Press 'C' to enable upconverter then move on the right the lever switch on the top of the radio.
Press 'C' again to disable and move the lever on the left.
Press 'D' to set audio properties, in this menu you can press 1 or 2 to decrease or raise bass volume, 4 or 5 for middle, 7 or 8 for high, 3 or 6 for software volume, then press '#' to exit.
Press '*' to shutdown the system.
You can listen the audio streamed on the network using VLC and opening the network stream http://ip_address:8010
If you press the ky040 demodulation switch till "spyserver" appear on the display, you can connect to the radio with sdr#.
Open sdr#, set as souce "spy server" and point to spy://ip_address:5555/ ; the ip address of wifi and vpn is also shown on the display.
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If you use the integrated wifi module, you will listen some noise coming out the speaker like a tick.
I observe that these ticks are related to the network usage, more bandwidth is used more noise is produced on the speaker. Issue is resolved disabling integrated wifi and using an usb wifi dongle.
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Software requirements for running this python script are:
Raspbian OS updated
rtl_udp, rtl-sdr and spyserver ( check https://airspy.com/download/ )
pad4pi python libraries
cvlc from vlc suite
pulseaudio and alsamixer
wifi or lan configured(with or without openvpn) to use sdr# ( https://airspy.com/download/ )remotely.
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Install:
Put the python script on /home/pi/RADIO/ directory, naming it ctrl_rtl.py , together with spyserver and spyserver.conf
Run: chmod +x ctrl_rtl.py; chmod +x spyserver
Edit spyserver.conf for your needs
To run it at startup add to /etc/rc.local the line:
su pi -c "sleep 20; nohup /home/pi/RADIO/ctrl_rtl.py &"
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TBD:
- CW listening (and decoding? printing it on lcd?)
- RDS decoding when listening to BFM stations
- do something with 'B' key
- date and time display
- improve speed and stability
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watch video below in fullscreen at 480p

#!/usr/bin/python # coding=utf-8 import os import signal import subprocess import shlex import smbus import time import socket, sys, tty, termios import fcntl import struct import threading import RPi.GPIO as GPIO from datetime import datetime from time import gmtime, strftime, sleep from pad4pi import rpi_gpio FREQ=90100000 #default frequency SQUELCH=90 #default squelch level UPCONV=0 #upconverter disabled on startup #FNULL = open(os.devnull, 'w') LEDP = 4 #pin where led is connected # below pin config of the 3 ky040 CLOCK_1 = 17 DATA_1 = 27 SWITCH_1 = 22 CLOCK_2 = 11 DATA_2 = 9 SWITCH_2 = 10 CLOCK_3 = 14 DATA_3 = 18 SWITCH_3 = 15 # below pin config of keyboard ROW_PINS = [20, 16, 12, 7] COL_PINS = [8, 25, 24, 23] INPUT_FREQ='N' INPUT_FUNC='N' INPUT_AUD='N' Current1_A = 1 Current1_B = 1 Current2_A = 1 Current2_B = 1 Current3_A = 1 Current3_B = 1 HOLD=0 LCD_TIMEOUT=3000 # lcd backlight timeout in seconds * 10 , 3000 = 5 mins temp_freq='' # default bass middle treble and volume soft value BASS=80 MIDDLE=80 HIGH=80 VOL=150 #keyboard key mapping KEYPAD = [ [1, 2, 3, "A"], [4, 5, 6, "B"], [7, 8, 9, "C"], ["*", 0, "#", "D"] ] I2C_ADDR = 0x3f # I2C device address LCD_WIDTH = 20 # Maximum characters per line LCD_CHR = 1 # Mode - Sending data LCD_CMD = 0 # Mode - Sending command LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line LCD_BACKLIGHT = 0x08 # On #LCD_BACKLIGHT = 0x00 # Off ENABLE = 0b00000100 # Enable bit # Timing constants E_PULSE = 0.0005 E_DELAY = 0.0005 bus = smbus.SMBus(1) # Rev 2 Pi uses 1 def getch(): fd = sys.stdin.fileno() old_settings = termios.tcgetattr(fd) try: tty.setraw(sys.stdin.fileno()) ch = sys.stdin.read(1) finally: termios.tcsetattr(fd, termios.TCSADRAIN, old_settings) return ch def get_ip_address(ifname): s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) return socket.inet_ntoa(fcntl.ioctl( s.fileno(), 0x8915, # SIOCGIFADDR struct.pack('256s', ifname[:15]) )[20:24]) def lcd_init(): # Initialise display lcd_byte(0x33,LCD_CMD) # 110011 Initialise lcd_byte(0x32,LCD_CMD) # 110010 Initialise lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size lcd_byte(0x01,LCD_CMD) # 000001 Clear display time.sleep(E_DELAY) def lcd_byte(bits, mode): # Send byte to data pins # bits = the data # mode = 1 for data # 0 for command bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT # High bits bus.write_byte(I2C_ADDR, bits_high) lcd_toggle_enable(bits_high) # Low bits bus.write_byte(I2C_ADDR, bits_low) lcd_toggle_enable(bits_low) def lcd_toggle_enable(bits): # Toggle enable time.sleep(E_DELAY) bus.write_byte(I2C_ADDR, (bits | ENABLE)) time.sleep(E_PULSE) bus.write_byte(I2C_ADDR,(bits & ~ENABLE)) time.sleep(E_DELAY) def lcd_string(message,line): # Send string to display message = message.ljust(LCD_WIDTH," ") lcd_byte(line, LCD_CMD) for i in range(LCD_WIDTH): lcd_byte(ord(message[i]),LCD_CHR) def set_freq(UPCONV,freq): # global UPCONV if UPCONV==1: data=int(freq)+125000000 if UPCONV==0: data=int(freq) print data i=0 buf = "" buf = buf + chr(0) while i < 4: buf = buf + chr(data & 0xff) data = data >> 8 i = i + 1 s.send(buf) def set_squelch(squelch): data=int(squelch) i=0 buf = "" buf = buf + chr(2) while i < 4: buf = buf + chr(data & 0xff) data = data >> 8 i = i + 1 s.send(buf) def bass_up(): global BASS BASS=BASS+2 lcd_string('Bass: '+str(BASS),LCD_LINE_1) subprocess.Popen(shlex.split('amixer -D equal sset \'00. 31 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'01. 63 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'02. 125 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) def bass_down(): global BASS BASS=BASS-2 lcd_string('Bass: '+str(BASS),LCD_LINE_1) subprocess.Popen(shlex.split('amixer -D equal sset \'00. 31 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'01. 63 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'02. 125 Hz\',0 playback '+str(BASS)),shell=False) #,stdout=FNULL, stderr=FNULL) def middle_up(): global MIDDLE MIDDLE=MIDDLE+2 lcd_string('Middle: '+str(MIDDLE),LCD_LINE_2) subprocess.Popen(shlex.split('amixer -D equal sset \'03. 250 Hz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'04. 500 Hz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'05. 1 kHz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'06. 2 kHz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) def middle_down(): global MIDDLE MIDDLE=MIDDLE-2 lcd_string('Middle: '+str(MIDDLE),LCD_LINE_2) subprocess.Popen(shlex.split('amixer -D equal sset \'03. 250 Hz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'04. 500 Hz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'05. 1 kHz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'06. 2 kHz\',0 playback '+str(MIDDLE)),shell=False) #,stdout=FNULL, stderr=FNULL) def high_up(): global HIGH HIGH=HIGH+2 lcd_string('High: '+str(HIGH),LCD_LINE_3) subprocess.Popen(shlex.split('amixer -D equal sset \'07. 4 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'08. 8 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'09. 16 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) def high_down(): global HIGH HIGH=HIGH-2 lcd_string('High: '+str(HIGH),LCD_LINE_3) subprocess.Popen(shlex.split('amixer -D equal sset \'07. 4 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'08. 8 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) subprocess.Popen(shlex.split('amixer -D equal sset \'09. 16 kHz\',0 playback '+str(HIGH)),shell=False) #,stdout=FNULL, stderr=FNULL) def vol_up(): global VOL VOL=VOL+5 lcd_string('Volume: '+str(VOL),LCD_LINE_4) subprocess.Popen(shlex.split('pactl set-sink-volume 1 '+str(VOL)+'\%'),shell=False) #,stdout=FNULL, stderr=FNULL) def vol_down(): global VOL VOL=VOL-5 lcd_string('Volume: '+str(VOL),LCD_LINE_4) subprocess.Popen(shlex.split('pactl set-sink-volume 1 '+str(VOL)+'\%'),shell=False) #,stdout=FNULL, stderr=FNULL) def start_vlc(): global vlc vlc=subprocess.Popen(shlex.split("cvlc pulse://alsa_output.platform-soc_audio.analog-stereo.monitor -A none --sout-keep --sout \'#transcode{samplerate=44100,acodec=a52,ab=128}:std{access=http,mux=ogg,dst=0.0.0.0:8010}\'"), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) def start(j): global rtl global play global MODL global FREQ global SQUELCH global UPCONV if UPCONV==1: FREQ=FREQ+125000000 bfm = 'rtl_udp -f ' + str(FREQ) + ' -N -s 260k -l ' + str(SQUELCH) + ' -r 48k -C -D -' playbfm = 'paplay -p --raw --rate=48000 --channels=1 --format=s16le --stream-name=RTL-SDR' nfm = 'rtl_udp -f ' + str(FREQ) + ' -s 12k -N -l ' + str(SQUELCH) + ' -r 12k -C -D -' playnfm='paplay -p --raw --rate=12000 --channels=1 --format=s16le --stream-name=RTL-SDR' am = 'rtl_udp -f ' + str(FREQ) + ' -s 9k -M -r 9k -l ' + str(SQUELCH) + ' -C -E -' playam = 'paplay -p --raw --rate=9000 --channels=1 --format=s16le --stream-name=RTL-SDR' lsb = 'rtl_udp -f ' + str(FREQ) + ' -L -o 4 -s 2400 -r 2400 -l ' + str(SQUELCH) + ' -C -' usb = 'rtl_udp -f ' + str(FREQ) + ' -U -o 4 -s 2400 -r 2400 -l ' + str(SQUELCH) + ' -C -' playssb = 'paplay -p --raw --rate=2400 --channels=1 --format=s16le --stream-name=RTL-SDR' cw = 'rtl_udp -f ' + str(FREQ) + ' -s 500 -M -r 500 -l ' + str(SQUELCH) + ' -C -E -' playcw = 'play -q -r 500 -t S16 -c 1 - gain -l 30' tcp = '/home/pi/RADIO/spyserver /home/pi/RADIO/spyserver.config' playtcp = 'tail -f /dev/null' if UPCONV==1: FREQ=FREQ-125000000 lcd_init() if j==0: MODL='BFM' rtl = subprocess.Popen(shlex.split(bfm), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playbfm), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) start_vlc() if j==1: MODL='NFM' rtl.kill() play.kill() rtl = subprocess.Popen(shlex.split(nfm), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playnfm), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) if j==2: MODL='AM' rtl.kill() play.kill() rtl = subprocess.Popen(shlex.split(am), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playam), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) if j==3: MODL='LSB' rtl.kill() play.kill() rtl = subprocess.Popen(shlex.split(lsb), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playssb), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) if j==4: MODL='USB' rtl.kill() play.kill() rtl = subprocess.Popen(shlex.split(usb), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playssb), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) if j==5: rtl.kill() play.kill() rtl = subprocess.Popen(shlex.split(tcp), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) play = subprocess.Popen(shlex.split(playtcp), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string('____SPYSERVER____',LCD_LINE_1) lcd_string(' '+str(IPW)+':5555',LCD_LINE_2) lcd_string(' '+str(IPO)+':5555',LCD_LINE_3) if j==6: rtl.kill() play.kill() MODL='BFM' rtl = subprocess.Popen(shlex.split(bfm), shell=False, stdout=subprocess.PIPE) #, stderr=FNULL) play = subprocess.Popen(shlex.split(playbfm), shell=False, stdin=rtl.stdout) #, stdout=FNULL, stderr=subprocess.STDOUT) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) lcd_string(' ',LCD_LINE_3) def rotary_interrupt_1(A_or_B): global FREQ global SQUELCH global HOLD global UPCONV global Current1_A, Current1_B, LockRotary HOLD=0 Switch1_A = GPIO.input(CLOCK_1) Switch1_B = GPIO.input(DATA_1) if Current1_A == Switch1_A and Current1_B == Switch1_B: return Current1_A = Switch1_A Current1_B = Switch1_B if (Switch1_A and Switch1_B): LockRotary.acquire() if A_or_B == DATA_1: FREQ=FREQ+50000 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) else: FREQ=FREQ-50000 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) LockRotary.release() return def rotary_interrupt_2(A_or_B): global FREQ global SQUELCH global HOLD global UPCONV global Current2_A, Current2_B, LockRotary HOLD=0 Switch2_A = GPIO.input(CLOCK_2) Switch2_B = GPIO.input(DATA_2) if Current2_A == Switch2_A and Current2_B == Switch2_B: return Current2_A = Switch2_A Current2_B = Switch2_B if (Switch2_A and Switch2_B): LockRotary.acquire() if A_or_B == DATA_2: FREQ=FREQ+500 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) else: FREQ=FREQ-500 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) LockRotary.release() return def rotary_interrupt_3(A_or_B): global FREQ global SQUELCH global HOLD global UPCONV global Current3_A, Current3_B, LockRotary HOLD=0 Switch3_A = GPIO.input(CLOCK_3) Switch3_B = GPIO.input(DATA_3) if Current3_A == Switch3_A and Current3_B == Switch3_B: return Current3_A = Switch3_A Current3_B = Switch3_B if (Switch3_A and Switch3_B): LockRotary.acquire() if A_or_B == DATA_3: FREQ=FREQ+5000 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) else: FREQ=FREQ-5000 set_freq(UPCONV,FREQ) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) LockRotary.release() return def switchPress_1(): global FREQ global SQUELCH global HOLD HOLD=0 SQUELCH=SQUELCH-10 set_squelch(SQUELCH) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) def switchPress_2(): global FREQ global SQUELCH global HOLD HOLD=0 SQUELCH=SQUELCH+10 set_squelch(SQUELCH) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) def switchPress_3(): global HOLD HOLD=0 global J J=J+1 if J==7: J=1 start(J) def keypress(key): #key A: enter a frequency manually, press '#' to confirm and exit #key B: tbd #key C: upconverted enabled/disabled #key D: bass mid treble and volume settings, 1-2 down-up bass, 4-5 for mid, 7-8 for treble, 3-6 for volume , press '#' to confirm and exit #key *: shutdown global INPUT_FREQ global INPUT_FUNC global INPUT_AUD global BASS,MIDDLE,HIGH,VOL global FREQ global UPCONV global temp_freq global LEDP global HOLD global J HOLD=0 print ('key:',key, 'FREQ:',INPUT_FREQ,'AUD:',INPUT_AUD,'UPCONV:',UPCONV) if key=='A' and INPUT_FREQ=='N' and INPUT_AUD=='N': INPUT_FREQ='Y' lcd_string('Enter Freq. in kHz:',LCD_LINE_1) lcd_string('',LCD_LINE_2) if isinstance(key,int) and INPUT_FREQ=='Y' and INPUT_AUD=='N': temp_freq=temp_freq+str(key) lcd_string('Enter Freq. in kHz:',LCD_LINE_1) lcd_string(temp_freq+' kHz',LCD_LINE_2) if key=='#' and INPUT_FREQ=='Y' and INPUT_AUD=='N': FREQ=int(temp_freq+'000') temp_freq='' INPUT_FREQ='N' lcd_string('Frequency set to:',LCD_LINE_1) lcd_string(str(FREQ)+' Hz',LCD_LINE_2) set_freq(UPCONV,FREQ) sleep(3) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) key='S' if key=='C' and INPUT_FREQ=='N' and INPUT_AUD=='N' and UPCONV==0: UPCONV=1 lcd_string('Upconverter',LCD_LINE_1) lcd_string(' enabled',LCD_LINE_2) lcd_string('',LCD_LINE_3) lcd_string('',LCD_LINE_4) sleep(3) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) key='S' if key=='C' and INPUT_FREQ=='N' and INPUT_AUD=='N' and UPCONV==1: UPCONV=0 lcd_string('Upconverter',LCD_LINE_1) lcd_string(' disabled',LCD_LINE_2) lcd_string('',LCD_LINE_3) lcd_string('',LCD_LINE_4) sleep(3) lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) key='S' if key=='D' and INPUT_FREQ=='N' and INPUT_AUD=='N': lcd_string('Bass: '+str(BASS),LCD_LINE_1) lcd_string('Middle: '+str(MIDDLE),LCD_LINE_2) lcd_string('High: '+str(HIGH),LCD_LINE_3) lcd_string('Volume: '+str(VOL),LCD_LINE_4) INPUT_AUD='Y' if isinstance(key,int) and INPUT_FREQ=='N'and INPUT_AUD=='Y': if key==1: bass_down() if key==2: bass_up() if key==4: middle_down() if key==5: middle_up() if key==7: high_down() if key==8: high_up() if key==3: vol_up() if key==6: vol_down() if key=='#' and INPUT_FREQ=='N' and INPUT_AUD=='Y': INPUT_AUD='N' lcd_string(' '+str(FREQ)+'Hz '+MODL,LCD_LINE_1) lcd_string(' SQ: '+str(SQUELCH),LCD_LINE_2) lcd_string('',LCD_LINE_3) lcd_string('',LCD_LINE_4) key='S' if key=='*' and INPUT_FREQ=='N' and INPUT_AUD=='N': lcd_string('Shutdown',LCD_LINE_1) lcd_string('Shutdown',LCD_LINE_2) lcd_string('Shutdown',LCD_LINE_3) lcd_string('Shutdown',LCD_LINE_4) #kill all processes, clenup gpio, shutdown display backlight and halt the system play.kill() rtl.kill() vlc.kill() GPIO.cleanup() GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(LEDP,GPIO.OUT) GPIO.output(LEDP,GPIO.HIGH) subprocess.Popen(shlex.split('i2cset -y 1 0x3f 0xF0 0x00'), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) subprocess.Popen(shlex.split('sudo halt'),shell=False) #,stdout=FNULL, stderr=FNULL) ################################### MAIN #################################### # initialize lcd lcd_init() # open a connection to the rtl_udp instance s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect(("localhost", 6020)) # save ip address of wifi and vpn to show them on display while in spyserver mode IPW=get_ip_address('wlan0') IPO=get_ip_address('tun0') #load gpio, keypad, ky040.... GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) factory = rpi_gpio.KeypadFactory() keypad = factory.create_keypad(keypad=KEYPAD, row_pins=ROW_PINS, col_pins=COL_PINS) GPIO.setup(LEDP,GPIO.OUT) GPIO.output(LEDP,GPIO.HIGH) LockRotary = threading.Lock() GPIO.setup(CLOCK_1, GPIO.IN) GPIO.setup(DATA_1, GPIO.IN) GPIO.add_event_detect(CLOCK_1, GPIO.RISING, callback=rotary_interrupt_1) # NO bouncetime GPIO.add_event_detect(DATA_1, GPIO.RISING, callback=rotary_interrupt_1) # NO bouncetime GPIO.setup(CLOCK_2, GPIO.IN) GPIO.setup(DATA_2, GPIO.IN) GPIO.add_event_detect(CLOCK_2, GPIO.RISING, callback=rotary_interrupt_2) # NO bouncetime GPIO.add_event_detect(DATA_2, GPIO.RISING, callback=rotary_interrupt_2) GPIO.setup(CLOCK_3, GPIO.IN) GPIO.setup(DATA_3, GPIO.IN) GPIO.add_event_detect(CLOCK_3, GPIO.RISING, callback=rotary_interrupt_3) # NO bouncetime GPIO.add_event_detect(DATA_3, GPIO.RISING, callback=rotary_interrupt_3) GPIO.setup(SWITCH_1, GPIO.IN, pull_up_down=GPIO.PUD_UP) GPIO.setup(SWITCH_2, GPIO.IN, pull_up_down=GPIO.PUD_UP) GPIO.setup(SWITCH_3, GPIO.IN, pull_up_down=GPIO.PUD_UP) keypad.registerKeyPressHandler(keypress) #set default volume subprocess.Popen(shlex.split('pactl set-sink-volume 1 '+str(VOL)+'\%'),shell=False) #start rtl J=0 start(J) while True: sleep(0.1) HOLD=HOLD+1 #if timeout is reached shutdown display backlight if HOLD==LCD_TIMEOUT: subprocess.Popen(shlex.split('i2cset -y 1 0x3f 0xF0 0x00'), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) #if a button is pressed turn on display backlight if HOLD==0: subprocess.Popen(shlex.split('i2cset -y 1 0x3f 0xF0 0x08'), shell=False) #, stdout=FNULL, stderr=subprocess.STDOUT) LockRotary.acquire() LockRotary.release() button_state1 = GPIO.input(SWITCH_1) if button_state1 == False: switchPress_2() button_state2 = GPIO.input(SWITCH_2) if button_state2 == False: switchPress_1() button_state3 = GPIO.input(SWITCH_3) if button_state3 == False: switchPress_3() #### you will never reach this point #### quit()