NodeMCU Projects: Difference between revisions
→Morse Code
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morse("amandeep")
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= I2C LCD =
https://forum.micropython.org/viewtopic.php?f=16&t=2858
https://forum.micropython.org/viewtopic.php?f=16&t=2858&start=30
https://github.com/dhylands/python_lcd/tree/master/lcd
esp8266_i2c_lcd.py
lcd_api.py
D1 SCL ------------ SCL
D2 SDA ------------ SDA
GND --------------- GND
5V ---------------- VCC
There are two versions of this device - the difference is the controller IC.
If you have the PCF8574T. the default I2C bus address is 0x27.
If you have the PCF8574AT the default I2C bus address is 0x3F.
An i2c.scan() should reveal which address to use
lcd=I2cLcd(i2c, 0x27, 2, 16)
lcd=I2cLcd(i2c, 39, 2, 16)
<syntaxhighlight lang="python">
>>> from machine import I2C
>>> i2c = I2C(scl=Pin(5), sda=Pin(4), freq=400000)
>>> print(i2c.scan())
>>> print(i2c.scan())
[63]
>>> lcd=I2cLcd(i2c, 63, 2, 16)
</syntaxhighlight>
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