diff --git a/.travis.yml b/.travis.yml
index 776e3e9..4075405 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,6 @@ git:
   quiet: true
 env:
   global:
-     - ARDUINO_IDE_VERSION="1.8.7"
      - PRETTYNAME="Adafruit BusIO Library"
 
 before_install:
diff --git a/Adafruit_I2CDevice.cpp b/Adafruit_I2CDevice.cpp
index eead63d..7e34866 100644
--- a/Adafruit_I2CDevice.cpp
+++ b/Adafruit_I2CDevice.cpp
@@ -3,12 +3,22 @@
 
 //#define DEBUG_SERIAL Serial
 
+/*!
+ *    @brief  Create an I2C device at a given address
+ *    @param  addr The 7-bit I2C address for the device
+ *    @param  theWire The I2C bus to use, defaults to &Wire
+ */
 Adafruit_I2CDevice::Adafruit_I2CDevice(uint8_t addr, TwoWire *theWire) {
   _addr = addr;
   _wire = theWire;
   _begun = false;
 }
 
+/*!
+ *    @brief  Initializes and does basic address detection
+ *    @return True if I2C initialized and a device with the addr found
+ */
+
 bool Adafruit_I2CDevice::begin(void) {
   _wire->begin();
   _begun = true;
@@ -16,6 +26,12 @@ bool Adafruit_I2CDevice::begin(void) {
   return detected();
 }
 
+
+/*!
+ *    @brief  Scans I2C for the address - note will give a false-positive
+ *    if there's no pullups on I2C
+ *    @return True if I2C initialized and a device with the addr found
+ */
 bool Adafruit_I2CDevice::detected(void) {
   // Init I2C if not done yet
   if (!_begun && !begin()) {
@@ -30,6 +46,15 @@ bool Adafruit_I2CDevice::detected(void) {
   return false;
 }
 
+/*!
+ *    @brief  Write a buffer or two to the I2C device. Cannot be more than 32 bytes.
+ *    @param  buffer Pointer to buffer of data to write
+ *    @param  len Number of bytes from buffer to write
+ *    @param  prefix Pointer to optional array of data to write before buffer. Cannot be more than 32 bytes.
+ *    @param  prefix_len Number of bytes from prefix buffer to write
+ *    @param  stop Whether to send an I2C STOP signal on write
+ *    @return True if write was successful, otherwise false.
+ */
 bool Adafruit_I2CDevice::write(uint8_t *buffer, size_t len, bool stop, uint8_t *prefix_buffer, size_t prefix_len) {
   if ((len+prefix_len) > 32) {
     // currently not guaranteed to work if more than 32 bytes!
@@ -85,6 +110,14 @@ bool Adafruit_I2CDevice::write(uint8_t *buffer, size_t len, bool stop, uint8_t *
   return (_wire -> endTransmission(stop) == 0);
 }
 
+
+/*!
+ *    @brief  Read from I2C into a buffer from the I2C device. Cannot be more than 32 bytes.
+ *    @param  buffer Pointer to buffer of data to read into
+ *    @param  len Number of bytes from buffer to read.
+ *    @param  stop Whether to send an I2C STOP signal on read
+ *    @return True if read was successful, otherwise false.
+ */
 bool Adafruit_I2CDevice::read(uint8_t *buffer, size_t len, bool stop) {
   if (len > 32) {
     // currently not guaranteed to work if more than 32 bytes!
@@ -125,6 +158,15 @@ bool Adafruit_I2CDevice::read(uint8_t *buffer, size_t len, bool stop) {
 }
 
 
+/*!
+ *    @brief  Write some data, then read some data from I2C into another buffer. Cannot be more than 32 bytes. The buffers can point to same/overlapping locations.
+ *    @param  write_buffer Pointer to buffer of data to write from
+ *    @param  write_len Number of bytes from buffer to write.
+ *    @param  read_buffer Pointer to buffer of data to read into.
+ *    @param  read_len Number of bytes from buffer to read.
+ *    @param  stop Whether to send an I2C STOP signal between the write and read
+ *    @return True if write & read was successful, otherwise false.
+ */
 bool Adafruit_I2CDevice::write_then_read(uint8_t *write_buffer, size_t write_len, uint8_t *read_buffer, size_t read_len, bool stop) {
   if (! write(write_buffer, write_len, stop)) {
     return false;
@@ -134,7 +176,10 @@ bool Adafruit_I2CDevice::write_then_read(uint8_t *write_buffer, size_t write_len
 }
 
 
-
+/*!
+ *    @brief  Returns the 7-bit address of this device
+ *    @return The 7-bit address of this device
+ */
 uint8_t Adafruit_I2CDevice::address(void) {
   return _addr;
 }