I am working with an ESP32S that has 38Pins.  I have not been able to get the I2c bus to recognize a DS3231 RTC

I have try to scan the bus with no luck.  Any help would be greatly appreciated. I have 2k pull up resistors on both lines.

import machine
i2c = machine.I2C(-1, scl=machine.Pin(5), sda=machine.Pin(4))
print('Scan i2c bus...')
devices = i2c.scan()
if len(devices) == 0:
print("No i2c device !")
else:
print('i2c devices found:',len(devices))
for device in devices: 
print("Decimal address: ",device," | Hexa address: ",hex(device))