#shows the address of liquid crystal display as 0x27. You will most likely get the same address for LCD with 16 columns and 2 rows.
import machine 
sdaPIN=machine.Pin(21) #for ESP32 
sclPIN=machine.Pin(22) 
i2c=machine.I2C(sda=sdaPIN, scl=sclPIN, freq=10000)
devices = i2c.scan() 
if len(devices) == 0: 
	print("No i2c device !") 
else: 
	print('i2c devices found:',len(devices)) 
for device in devices: 
	print("At address: ",hex(device))