Give option for users to specify sda and scl but not freq in micropython_i2c

Author: malcolm-sparkfun

qwiic_i2c/micropython_i2c.py

@@ -40,11 +40,11 @@
 _PLATFORM_NAME = "MicroPython"
 
 # used internally in this file to get i2c class object 
-def _connectToI2CBus(sda=None, scl=None, freq=None, *args, **argk):
+def _connectToI2CBus(sda=None, scl=None, freq=100000, *args, **argk):
 	try:
 		from machine import I2C, Pin
 		if sys.platform == 'rp2':
-			if sda is not None and scl is not None and freq is not None:
+			if sda is not None and scl is not None:
 				# I2C busses follow every other pair of pins
 				scl_id = (scl // 2) % 2
 				sda_id = (sda // 2) % 2
@@ -57,7 +57,7 @@ def _connectToI2CBus(sda=None, scl=None, freq=None, *args, **argk):
 		elif 'xbee' in sys.platform:
 			return I2C(id=1, freq=freq)
 		elif 'esp32' in sys.platform:
-			if sda is not None and scl is not None and freq is not None:
+			if sda is not None and scl is not None:
 				return I2C(scl=Pin(scl), sda=Pin(sda), freq=freq)
 			else:
 				return I2C()
@@ -77,7 +77,7 @@ class MicroPythonI2C(I2CDriver):
 	name = _PLATFORM_NAME
 	_i2cbus = None
 
-	def __init__(self, sda=None, scl=None, freq=None, *args, **argk):
+	def __init__(self, sda=None, scl=None, freq=100000, *args, **argk):
 		I2CDriver.__init__(self) # init super
 
 		self._sda = sda