This is a Python port of arduino_ST7032. It lets you use these devices in I2C mode. Parallel/8bit/4bit and SPI modes are not currently supported.
ST7032 is an i2c character display driver, embedded in some fancier character displays.
Tested good: BuyDisplay 16x2 COG
Many on eBay, search with description for st7032
I2C SDA, SCL to your devices' best pins for these.
XRESET to VDD. It will not respond without this.
Backlights typically are raw LEDs; the buydisplay white-on-blue expects 3.1v at 15ma, or ~ 120 ohm resistor from 5v.
Enable i2c mode with these pins:
PSB to VDD PSI2B to GND
Datasheet also says E to VDD, I haven't found this necessary
0.1-4.7uf capacitor across CAP1P (positive) and CAP1N (negative)
VDD to 2.7-5.5V VSS to GND
device = st7032.ST7032()
device.setContrast(53)
device.clear()
device.write("Hello World!")
device.setCursor(0,1) # column 0, row 1
device.write("Goodbye")Pass these to ST7032():
busnum = 0 # i2c bus
address = 0x3e # i2c address
lines = 2 # is this a 1-line, 2-line, 4-line display
dotsize = 0 # I'm not sure what this does
Please file a GitHub issue. Thanks!