Merge pull request #70 from adafruit/fix-32u

Fix 32u with Wire end()

.github/workflows/githubci.yml

@@ -20,7 +20,7 @@ jobs:
       run: bash ci/actions_install.sh
 
     - name: test platforms
-      run: python3 ci/build_platform.py main_platforms zero
+      run: python3 ci/build_platform.py main_platforms zero feather32u4
 
     - name: clang
       run: python3 ci/run-clang-format.py -e "ci/*" -e "bin/*" -r . 

Adafruit_I2CDevice.cpp

@@ -39,12 +39,17 @@ bool Adafruit_I2CDevice::begin(bool addr_detect) {
  *    @brief  De-initialize device, turn off the Wire interface
  */
 void Adafruit_I2CDevice::end(void) {
-#ifndef ESP8266
-  // ESP8266 does not implement Wire::end()
+  // Not all port implement Wire::end(), such as
+  // - ESP8266
+  // - AVR core without WIRE_HAS_END
+  // - ESP32: end() is implemented since 2.0.1 which is latest at the moment.
+  // Temporarily disable for now to give time for user to update.
+#if !(defined(ESP8266) ||                                                      \
+      (defined(ARDUINO_ARCH_AVR) && !defined(WIRE_HAS_END)) ||                 \
+      defined(ARDUINO_ARCH_ESP32))
   _wire->end();
-#endif
-
   _begun = false;
+#endif
 }
 
 /*!