Finish python code
This commit is contained in:
pangduckwai
@@ -64,6 +64,9 @@ Well I'm not too sure about what is the point to install python-pip then remove
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* `sudo apt-get purge python-pip`
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* `sudo -H pip install --upgrade luma.oled`
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### Install `ifstat` for displaying network statistic
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* `sudo apt-get install ifstat`
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## Test
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That's it, the display is ready to use.
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@@ -74,6 +77,19 @@ That's it, the display is ready to use.
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* `sudo python demo.py`
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## Next step
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The original Python code in this repo is adopted from `demo.py` provided by the manufacturer, which is no good for 'production' use. Because your Pi will be too busy looking for button inputs instead of doing anything else useful.
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The Python code in this repo (`monitor.py`) display system information of the Pi:
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1. **Button 1** - Display information relating to the main purpose of the Pi: _Disk space_ and _WiFi_.
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2. **Button 2** - Display _IP Address_, _CPU Idle %_, _Memory usage_ and _System temperature_.
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3. **Button 3** - Display the system shutdown dialog, use the Joystick to select options, press **Button 3** to confirm your choice.
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The screen will turn off after idling for around 20 seconds.
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The latest version utilize GPIO input detection instead of busy wait, which is much more reasonable CPU-wise.
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### CPU usage
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The original Python code in this repo (`monitor.py`) is adopted from `demo.py` provided by the manufacturer, which is no good for 'production' use. Because your Pi will be too busy looking for button inputs instead of doing anything else useful.
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The latest version utilize GPIO input detection instead of busy wait, which is much more reasonable CPU-wise.
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### Enable the display at startup
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* `sudo vi /etc/rc.local`
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* Add the following line at the end of the file, assuming `monitor.py` is in /home/pi/:
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* `sudo python /home/pi/monitor.py &`
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* _**IMPORTANT**_ Don't forget the `&` character at the end!
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+76
-32
@@ -17,19 +17,21 @@ from PIL import ImageDraw
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from PIL import ImageFont
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#GPIO define
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RST_PIN = 25
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RST_PIN = 25 #Reset
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CS_PIN = 8
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DC_PIN = 24
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JS_U_PIN = 6
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JS_D_PIN = 19
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JS_L_PIN = 5
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JS_R_PIN = 26
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JS_P_PIN = 13
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JS_U_PIN = 6 #Joystick Up
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JS_D_PIN = 19 #Joystick Down
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JS_L_PIN = 5 #Joystick Left
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JS_R_PIN = 26 #Joystick Right
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JS_P_PIN = 13 #Joystick Pressed
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BTN1_PIN = 21
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BTN2_PIN = 20
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BTN3_PIN = 16
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# Some constants
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SCREEN_SAVER = 20.0
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CHAR_WIDTH = 19
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font = ImageFont.load_default()
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width = 128
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height = 64
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@@ -55,13 +57,34 @@ device = sh1106(serial, rotate=2) #sh1106
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draw = ImageDraw.Draw(Image.new('1', (width, height)))
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draw.rectangle((0,0,width,height), outline=0, fill=0)
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SCREEN_SAVER = 20.0
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state = 0
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stamp = time.time()
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start = time.time()
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state = 0 #System state: 0 - scrren is off; equal to channel number (e.g. BTN2_PIN, JS_P_PIN) otherwise
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stops = 0 #Shutdown choice: 0 - No; 1 - Yes
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stamp = time.time() #Current timestamp
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start = time.time() #Start screen saver count down
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def end_process(channel):
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os.system("sudo shutdown -h now")
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def shutdown(channel):
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global stops
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if state == BTN3_PIN:
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if stops == 1:
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draw_process(RST_PIN)
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os.system("sudo shutdown -h now")
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else:
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main_process(BTN1_PIN)
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else:
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stops = 0
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main_process(BTN3_PIN)
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def select(channel):
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global stops
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if state == BTN3_PIN:
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if channel == JS_L_PIN:
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stops = 1
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draw_process(state)
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elif channel == JS_R_PIN:
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stops = 0
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draw_process(state)
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else:
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pass
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def draw_process(channel):
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with canvas(device) as draw:
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@@ -70,31 +93,50 @@ def draw_process(channel):
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LINE2 = ""
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LINE3 = ""
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LINE4 = ""
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LINE5 = ""
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if channel == BTN1_PIN:
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if channel == BTN2_PIN:
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LINE1 = subprocess.check_output("hostname -I | awk '{printf \"IP :%s\", $1}'", shell = True )
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LINE3 = subprocess.check_output("top -bn1 | awk 'NR==3{printf \"CPU:%.1f%% idle\", $8}'", shell = True )
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LINE4 = subprocess.check_output("free -mh | awk 'NR==2{printf \"Mem:%s/%s %.1f%%\", $3,$2,$3*100/$2 }'", shell = True )
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LINE5 = subprocess.check_output("cat /sys/class/thermal/thermal_zone0/temp | awk '{printf \"Tmp:%.1fC\", $1/1000}'", shell = True )
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elif channel == BTN2_PIN:
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ssid = subprocess.check_output("iwgetid --raw | awk '{printf \"Net: %s\", $0}'", shell = True)
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LINE2 = subprocess.check_output("top -bn1 | awk 'NR==3{printf \"CPU:%.1f%% idle\", $8}'", shell = True )
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LINE3 = subprocess.check_output("free -mh | awk 'NR==2{printf \"Mem:%s/%s %.1f%%\", $3,$2,$3*100/$2 }'", shell = True )
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LINE4 = subprocess.check_output("cat /sys/class/thermal/thermal_zone0/temp | awk '{printf \"Tmp:%.1fC\", $1/1000}'", shell = True )
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elif channel == BTN1_PIN:
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ssid = subprocess.check_output("iwgetid --raw | awk '{printf \"WiFi:%s\", $0}'", shell = True)
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freq = subprocess.check_output("iwgetid --freq | awk '{gsub(/Frequency:/,\"\"); printf \" %.1f %s\", $2,$3}'", shell = True)
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LINE2 = subprocess.check_output("df -h /mnt/usb | awk '$NF==\"/mnt/usb\"{printf \"USB:%s/%s %s\", $3,$2,$5}'", shell = True )
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LINE3 = ssid + freq
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LINE4 = " in Kbps out Kbps"
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LINE5 = subprocess.check_output("ifstat -bT 0.1 1 | awk 'NR==3{printf \"%9.2f %9.2f\",$3,$4}'", shell = True)
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LINE1 = subprocess.check_output("df -h /mnt/usb | awk '$NF==\"/mnt/usb\"{printf \"Disk:%s/%s %s\", $3,$2,$5}'", shell = True )
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LINE2 = ssid + freq
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LINE3 = " in Kbps out Kbps"
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LINE4 = subprocess.check_output("ifstat -bT 0.1 1 | awk 'NR==3{printf \"%9.2f %9.2f\",$3,$4}'", shell = True)
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elif channel == BTN3_PIN:
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LINE2 = " Shutdown?"
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LINE4 = " Yes No"
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LINE1 = " Shutdown ?"
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LINE3 = " Yes No"
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if stops == 0:
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draw.rectangle((72,50,94,52), outline=255, fill=1)
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else:
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draw.rectangle((15,50,37,52), outline=255, fill=1)
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elif channel == RST_PIN:
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LINE2 = " Shutting down..."
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else:
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pass
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draw.text((xpos, top), LINE0, font=font, fill=255)
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draw.text((xpos, top+12), LINE1, font=font, fill=255)
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draw.text((xpos, top+22), LINE2, font=font, fill=255)
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draw.text((xpos, top+32), LINE3, font=font, fill=255)
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draw.text((xpos, top+42), LINE4, font=font, fill=255)
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draw.text((xpos, top+52), LINE5, font=font, fill=255)
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if len(LINE1) > CHAR_WIDTH:
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draw.text((xpos, top+12), LINE1[:CHAR_WIDTH], font=font, fill=255)
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else:
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draw.text((xpos, top+12), LINE1, font=font, fill=255)
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if len(LINE2) > CHAR_WIDTH:
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draw.text((xpos, top+28), LINE2[:CHAR_WIDTH], font=font, fill=255)
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else:
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draw.text((xpos, top+28), LINE2, font=font, fill=255)
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if len(LINE3) > CHAR_WIDTH:
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draw.text((xpos, top+40), LINE3[:CHAR_WIDTH], font=font, fill=255)
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else:
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draw.text((xpos, top+40), LINE3, font=font, fill=255)
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if len(LINE4) > CHAR_WIDTH:
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draw.text((xpos, top+52), LINE4[:CHAR_WIDTH], font=font, fill=255)
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else:
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draw.text((xpos, top+52), LINE4, font=font, fill=255)
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def main_process(channel):
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global serial
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@@ -127,10 +169,12 @@ def main_process(channel):
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else: # state > 0 && channel == 0 && not-yet-timeout, refresh screen
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draw_process(state)
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GPIO.add_event_detect(JS_P_PIN, GPIO.RISING, callback=main_process, bouncetime=200)
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GPIO.add_event_detect(BTN1_PIN, GPIO.RISING, callback=main_process, bouncetime=200)
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GPIO.add_event_detect(BTN2_PIN, GPIO.RISING, callback=main_process, bouncetime=200)
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GPIO.add_event_detect(BTN3_PIN, GPIO.RISING, callback=main_process, bouncetime=200)
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GPIO.add_event_detect(BTN3_PIN, GPIO.RISING, callback=shutdown, bouncetime=200)
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GPIO.add_event_detect(JS_L_PIN, GPIO.RISING, callback=select, bouncetime=200)
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GPIO.add_event_detect(JS_R_PIN, GPIO.RISING, callback=select, bouncetime=200)
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try:
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main_process(BTN1_PIN)
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