diff --git a/snippets/ev3/i2c_basics/main.py b/snippets/ev3/i2c_basics/main.py
index 1cf53a5..37d412f 100644
--- a/snippets/ev3/i2c_basics/main.py
+++ b/snippets/ev3/i2c_basics/main.py
@@ -12,7 +12,7 @@ device = I2CDevice(Port.S2, 0xD2 >> 1)
 # Read one byte from the device.
 # For this device, we can read the Who Am I
 # register (0x0F) for the expected value: 211.
-if 211 not in device.read(0x0F, 1):
+if 211 not in device.read(0x0F):
     raise OSError("Device is not attached")
 
 # To write data, create a bytes object of one
diff --git a/snippets/ev3/i2c_extra/main.py b/snippets/ev3/i2c_extra/main.py
index 7055146..807ea2f 100644
--- a/snippets/ev3/i2c_extra/main.py
+++ b/snippets/ev3/i2c_extra/main.py
@@ -18,11 +18,18 @@ device.read(reg=None, length=1)
 # Read 0 bytes from no particular register:
 device.read(reg=None, length=0)
 
+# I2C write operations consist of a register byte followed
+# by a series of data bytes. Depending on your device, you
+# can choose to skip the register or data as follows:
+
 # Recommended for writing:
 device.write(reg=0x22, data=b'\x08')
 
 # Write 1 byte to no particular register:
 device.write(reg=None, data=b'\x08')
 
+# Write 0 bytes to a particular register:
+device.write(reg=0x08, data=None)
+
 # Write 0 bytes to no particular register:
-device.write(reg=None, data=b'')
+device.write(reg=None, data=None)