I2C測試

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))

如果接線正確會出現以下畫面

>>> %Run -c $EDITOR_CONTENT

MPY: soft reboot

Warning: I2C(-1, ...) is deprecated, use SoftI2C(...) instead

i2c devices found: 1

At address:  0x27

>>> 

要將這二個py先上傳至ESP32的基板內

要將lcd_api.py,i2c_lcd.py要跟主程式放在同一個目錄