Update SSD1306.md
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## 1 - Hardware
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**0.96inch OLED Module MC096GX**
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|Name|Color 1|Color 2|Color 3|
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|----|----|----|---|
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|Disp Color|white|blue|yellow/blue Double Color|
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|SKU|MC096GW|MC096GB|MC096GY|
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|item|content|
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|----|----|
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|Size|0.96(inch)|
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|Type|OLED|
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|OLED Chip|SSD1306|
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|Resolution|128*64 (Pixel)|
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|Module Port|IIC，①-GND,②-VCC,③-SCL,④-SDA|
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|Disp Area|21.744x10.864(mm)|
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|Module Size|27.3x27.8(mm)|
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|Viewing Angle|>160°|
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|Work Temp.|-20℃~60℃|
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|Save Temp.|-30℃~70℃|
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|Operating Volt.|3.3V / 5V|
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|Power Consumption|To be determined|
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|Product weight (including packaging）|8 (g)|
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|PIN|Mode|Note|
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|----|----|----|
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|1|GND|OLED Power Ground|
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|2|VCC|OLED Power (3.3V~5V)|
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|3|SCL|OLED IIC BUS timer signal|
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|4|SDA|OLED IIC BUS date signal|
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----
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## 2 - Raspberry Pi 4B
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#### (1). I2C Config
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```
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cat /boot/config.txt | grep i2c_arm
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dtparam=i2c_arm=on
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```
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#### (2). PIN Connect
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|PI GPIO NO.|OLED|PI|
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|----|----|----|
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|GND|GND|1|
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|3|VCC|3V3|
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|5|SDA|SDA|
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|9|SCL|SCL|
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#### (3). Install
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```
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apt-get install python-pip python3-pip -y
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python -m pip install --upgrade pip setuptools wheel
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apt-get install python-pil python3-pil -y
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pip3 install Adafruit_GPIO
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pip3 install Adafruit_SSD1306
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pip3 install Adafruit_BBIO
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git clone https://github.com/adafruit/Adafruit_Python_SSD1306.git
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cd Adafruit_Python_SSD1306
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sudo python setup.py install
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cd Adafruit_Python_SSD1306/examples/
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cp Adafruit_Python_SSD1306/examples/stats.py /opt/
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python /opt/stats.py
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```
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#### (4). stats.py
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```
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# Copyright (c) 2017 Adafruit Industries
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# Author: Tony DiCola & James DeVito
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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import time
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import Adafruit_GPIO.SPI as SPI
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import Adafruit_SSD1306
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from PIL import Image
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from PIL import ImageDraw
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from PIL import ImageFont
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import subprocess
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# Raspberry Pi pin configuration:
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RST = None # on the PiOLED this pin isnt used
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# Note the following are only used with SPI:
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DC = 23
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SPI_PORT = 0
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SPI_DEVICE = 0
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# Beaglebone Black pin configuration:
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# RST = 'P9_12'
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# Note the following are only used with SPI:
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# DC = 'P9_15'
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# SPI_PORT = 1
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# SPI_DEVICE = 0
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# 128x32 display with hardware I2C:
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#disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)
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# 128x64 display with hardware I2C:
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#disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)
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# Note you can change the I2C address by passing an i2c_address parameter like:
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disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, i2c_address=0x3C)
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# Alternatively you can specify an explicit I2C bus number, for example
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# with the 128x32 display you would use:
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# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, i2c_bus=2)
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# 128x32 display with hardware SPI:
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# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
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# 128x64 display with hardware SPI:
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# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
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# Alternatively you can specify a software SPI implementation by providing
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# digital GPIO pin numbers for all the required display pins. For example
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# on a Raspberry Pi with the 128x32 display you might use:
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# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, sclk=18, din=25, cs=22)
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# Initialize library.
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disp.begin()
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# Clear display.
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disp.clear()
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disp.display()
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# Create blank image for drawing.
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# Make sure to create image with mode '1' for 1-bit color.
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width = disp.width
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height = disp.height
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image = Image.new('1', (width, height))
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# Get drawing object to draw on image.
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draw = ImageDraw.Draw(image)
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# Draw a black filled box to clear the image.
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draw.rectangle((0,0,width,height), outline=0, fill=0)
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# Draw some shapes.
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# First define some constants to allow easy resizing of shapes.
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padding = -2
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top = padding
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bottom = height-padding
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# Move left to right keeping track of the current x position for drawing shapes.
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x = 0
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# Load default font.
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font = ImageFont.load_default()
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# Alternatively load a TTF font. Make sure the .ttf font file is in the same directory as the python script!
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# Some other nice fonts to try: http://www.dafont.com/bitmap.php
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# font = ImageFont.truetype('Minecraftia.ttf', 8)
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while True:
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# Draw a black filled box to clear the image.
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draw.rectangle((0,0,width,height), outline=0, fill=0)
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# Shell scripts for system monitoring from here : https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
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cmd = "hostname -I | cut -d\' \' -f1"
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IP = subprocess.check_output(cmd, shell = True )
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cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
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CPU = subprocess.check_output(cmd, shell = True )
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cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%sMB %.2f%%\", $3,$2,$3*100/$2 }'"
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MemUsage = subprocess.check_output(cmd, shell = True )
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cmd = "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%dGB %s\", $3,$2,$5}'"
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Disk = subprocess.check_output(cmd, shell = True )
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cmd = "echo $(uname -r |sed 's/Release-OPENFANS+//'|sed 's/v8//'|sed 's/202.//')$(cat /boot/version|awk -F'-' '{print $6}')"
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Ver = subprocess.check_output(cmd, shell = True )
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cmd = "/usr/bin/get_cpu|grep Freq|awk '{print $3}'|sed 's/Mhz/ Mhz/'"
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Freq = subprocess.check_output(cmd, shell = True )
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cmd = "/usr/bin/get_cpu|grep Temp|awk '{print $3}'"
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Temp = subprocess.check_output(cmd, shell = True )
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# Write two lines of text.
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draw.text((x, top+0), "Freq: " + str(Freq), font=font, fill=255)
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draw.text((x, top+8), "Temp: " + str(Temp), font=font, fill=255)
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draw.text((x, top+16), str(CPU), font=font, fill=255)
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draw.text((x, top+25), str(MemUsage), font=font, fill=255)
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draw.text((x, top+35), str(Disk), font=font, fill=255)
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draw.text((x, top+45), "IP: " + str(IP), font=font, fill=255)
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draw.text((x, top+55), "Ver: " + str(Ver),font=font, fill=255)
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# Display image.
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disp.image(image)
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disp.display()
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time.sleep(.1)
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```
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