Update to support latest version of logging.py

README.md

@@ -274,6 +274,28 @@ Detailed logging of device register operations can be enabled with:
 ina = INA219(SHUNT_OHMS, I2C(2), log_level=logging.DEBUG)
 ```
 
+## Unit Testing
+
+Some basic unit tests are provided which do not require an ina219 sensor to be connected.
+
+Copy all the files in the _test_ and _unittest_ directories to matching directories on the device. From the REPL prompt run the tests with:
+```python
+import unittest
+unittest.main("tests")
+```
+The result should be:
+```
+test_default (tests.TestConstructor) ... ok
+test_with_max_expected_amps (tests.TestConstructor) ... ok
+test_read_32v (tests.TestRead) ... ok
+test_read_16v (tests.TestRead) ... ok
+test_read_4_808v (tests.TestRead) ... ok
+----------------------------------------------------------------------
+Ran 5 tests
+
+OK
+<unittest.result.TestResult run=5 errors=0 failures=0>
+```
 ## Coding Standard
 
 This library adheres to the *PEP8* standard and follows the *idiomatic*

esp32/example.py

@@ -1,13 +1,14 @@
+"""Example script for ESP32."""
 from machine import Pin, I2C
 from ina219 import INA219
 from logging import INFO
 
 SHUNT_OHMS = 0.1
 
-i2c = I2C(-1, Pin(17), Pin(16))
+i2c = I2C(1, scl=Pin(16), sda=Pin(17))
 ina = INA219(SHUNT_OHMS, i2c, log_level=INFO)
 ina.configure()
 
 print("Bus Voltage: %.3f V" % ina.voltage())
 print("Current: %.3f mA" % ina.current())
-print("Power: %.3f mW" % ina.power())
+print("Power: %.3f mW" % ina.power())

esp8266/example.py

@@ -1,13 +1,14 @@
+"""Example script for ESP32."""
 from machine import Pin, I2C
 from ina219 import INA219
 from logging import INFO
 
 SHUNT_OHMS = 0.1
 
-i2c = I2C(-1, Pin(5), Pin(4))
+i2c = I2C(Pin(5), Pin(4))
 ina = INA219(SHUNT_OHMS, i2c, log_level=INFO)
 ina.configure()
 
 print("Bus Voltage: %.3f V" % ina.voltage())
 print("Current: %.3f mA" % ina.current())
-print("Power: %.3f mW" % ina.power())
+print("Power: %.3f mW" % ina.power())

example.py

@@ -1,4 +1,4 @@
-"""Example script.
+"""Example script for Pyboard v1.1.
 
 Edit the I2C interface constant to match the one you have
 connected the sensor to.

ina219.py

@@ -125,7 +125,9 @@ def __init__(self, shunt_ohms, i2c, max_expected_amps=None,
             calculations (optional).
         """
         logging.basicConfig(level=log_level)
-        self._log = logging.getLogger("ina219")
+        self._log = logging.getLogger(__name__)
+        self._log.setLevel(log_level)
+
         self._i2c = i2c
         self._address = address
         self._shunt_ohms = shunt_ohms
@@ -406,7 +408,7 @@ def __read_register(self, register, negative_value_supported=False):
 
     def __log_register_operation(self, msg, register, value):
         # performance optimisation
-        if logging._level == logging.DEBUG:
+        if self._log.isEnabledFor(logging.DEBUG):
             binary = '{0:#018b}'.format(value)
             self._log.debug("%s register 0x%02x: 0x%04x %s",
                             msg, register, value, binary)

tests/__init__.py

@@ -0,0 +1,2 @@
+from .test_constructor import *
+from .test_read import *

unittest/README.md

@@ -0,0 +1 @@
+This directory contains a copy of the standard Micropython unittest module [\_\_init\_\_.py](https://github.com/micropython/micropython-lib/blob/master/python-stdlib/unittest/unittest/__init__.py).