clean up INA238 since its software compat

Adafruit_INA237.cpp

@@ -3,9 +3,12 @@
  *
  *  @section ina237_intro Introduction
  *
- * 	I2C Driver for the INA237 I2C Current and Power sensor
+ * 	I2C Driver for the INA237/INA238 I2C Current and Power sensor
+ * 
+ *  Note: INA237 and INA238 are functionally identical devices with different
+ *  part numbers. This class implements all functionality for both chips.
  *
- * 	This is a library for the Adafruit INA237 breakout:
+ * 	This is a library for the Adafruit INA237/INA238 breakouts:
  * 	http://www.adafruit.com/products/xxxx
  *
  * 	Adafruit invests time and resources providing this open source code,

Adafruit_INA237.h

@@ -2,6 +2,9 @@
  *  @file Adafruit_INA237.h
  *
  * 	I2C Driver for INA237/INA238 Current and Power sensors
+ * 
+ *  Note: INA237 and INA238 are functionally identical devices with different
+ *  part numbers. This class implements all functionality for both chips.
  *
  * 	This is a library for the Adafruit INA237/INA238 breakouts:
  * 	http://www.adafruit.com/products/xxxx
@@ -20,9 +23,8 @@
 #include <Adafruit_INA2xx.h>
 
 #define INA237_I2CADDR_DEFAULT 0x40 ///< INA237/INA238 default i2c address
-#define INA237_DEVICE_ID \
-  0x238 ///< INA237 device ID (technically doesnt have one)
-#define INA238_DEVICE_ID 0x238 ///< INA238 device ID
+#define INA237_DEVICE_ID 0x238      ///< INA237 device ID
+#define INA238_DEVICE_ID 0x238      ///< INA238 device ID (identical to INA237)
 
 /**
  * @brief Alert trigger options specific to INA237/INA238.

Adafruit_INA238.cpp

@@ -31,10 +31,6 @@
 
 #include "Adafruit_INA238.h"
 
-#include <Wire.h>
-
-#include "Arduino.h"
-
 /*!
  *    @brief  Instantiates a new INA238 class
  */

Adafruit_INA238.h

@@ -24,7 +24,7 @@
 
 /*!
  *    @brief  Class that stores state and functions for interacting with
- *            INA238 Current and Power Sensor (subclass of INA237)
+ *            INA238 Current and Power Sensor (identical to INA237)
  */
 class Adafruit_INA238 : public Adafruit_INA237 {
  public:

README.md

@@ -4,11 +4,29 @@ Arduino library for the INA237 and INA238 power monitors
 [![Build Status](https://github.com/adafruit/Adafruit_INA237_INA238/workflows/Arduino%20Library%20CI/badge.svg)](https://github.com/adafruit/Adafruit_INA237_INA238/actions)
 [![Documentation](https://raw.githubusercontent.com/adafruit/ci-arduino/master/assets/doxygen_badge.svg)](https://adafruit.github.io/Adafruit_INA237_INA238/html/index.html)
 
-This is the Adafruit INA237 and INA238 Current and Power sensor library
+This is the Adafruit INA237 and INA238 Current and Power sensor library.
 
-Tested and works great with the Adafruit INA237 and INA238 Breakout Boards
+## Device Information
 
-These chips use I2C to communicate, 2 pins are required to interface
+The INA237 and INA238 are functionally identical devices with different part numbers. They share:
+- Same register map
+- Same device ID (0x238)
+- Same measurement capabilities and accuracy
+- Same configuration options
+
+This library provides separate classes for each part number for clarity:
+- `Adafruit_INA237` - For INA237 devices
+- `Adafruit_INA238` - For INA238 devices (a thin wrapper around the INA237 implementation)
+
+Tested and works great with the Adafruit INA237 and INA238 Breakout Boards.
+
+These chips use I2C to communicate, 2 pins are required to interface.
+
+## Installation
+
+To install, use the Arduino Library Manager and search for "Adafruit INA237" and install the library.
+
+## License Information
 
 Adafruit invests time and resources providing this open source code,
 please support Adafruit and open-source hardware by purchasing
@@ -17,5 +35,3 @@ products from Adafruit!
 Written by Limor "Ladyada" Fried for Adafruit Industries.
 MIT license, check license.txt for more information
 All text above must be included in any redistribution
-
-To install, use the Arduino Library Manager and search for "Adafruit INA237" and install the library.

examples/ina238_test/ina238_test.ino

@@ -1,5 +1,8 @@
 #include <Adafruit_INA238.h>
 
+// Note: The INA238 is functionally identical to the INA237.
+// This example demonstrates the INA238-specific class, but
+// all functionality is identical to the INA237 example.
 Adafruit_INA238 ina238 = Adafruit_INA238();
 
 void setup() {