From ed5cf93e1a92b24b34873f5a03479bd35f0a4e8e Mon Sep 17 00:00:00 2001
From: Dan Halbert <halbert@halwitz.org>
Date: Sat, 18 Apr 2020 23:10:02 -0400
Subject: [PATCH] check initial_value is explicitly None

---
 adafruit_ble/characteristics/__init__.py | 2 +-
 adafruit_ble/characteristics/float.py    | 2 +-
 adafruit_ble/characteristics/int.py      | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/adafruit_ble/characteristics/__init__.py b/adafruit_ble/characteristics/__init__.py
index 7253488..ebecc53 100644
--- a/adafruit_ble/characteristics/__init__.py
+++ b/adafruit_ble/characteristics/__init__.py
@@ -239,7 +239,7 @@ def __init__(
     ):
         self._struct_format = struct_format
         self._expected_size = struct.calcsize(struct_format)
-        if initial_value:
+        if initial_value is not None:
             initial_value = struct.pack(self._struct_format, *initial_value)
         super().__init__(
             uuid=uuid,
diff --git a/adafruit_ble/characteristics/float.py b/adafruit_ble/characteristics/float.py
index 3dfc5e3..eff39e1 100644
--- a/adafruit_ble/characteristics/float.py
+++ b/adafruit_ble/characteristics/float.py
@@ -46,7 +46,7 @@ def __init__(
         write_perm=Attribute.OPEN,
         initial_value=None
     ):
-        if initial_value:
+        if initial_value is not None:
             initial_value = (initial_value,)
         super().__init__(
             "<f",
diff --git a/adafruit_ble/characteristics/int.py b/adafruit_ble/characteristics/int.py
index 30a18cc..303c2d3 100755
--- a/adafruit_ble/characteristics/int.py
+++ b/adafruit_ble/characteristics/int.py
@@ -51,7 +51,7 @@ def __init__(
     ):
         self._min_value = min_value
         self._max_value = max_value
-        if initial_value:
+        if initial_value is not None:
             if not self._min_value <= initial_value <= self._max_value:
                 raise ValueError("initial_value out of range")
             initial_value = (initial_value,)