diff --git a/poetry.lock b/poetry.lock
index 5588bca5..a900e866 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -6,6 +6,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "apispec"
 version = "4.3.0"
@@ -18,12 +23,17 @@ python-versions = ">=3.6"
 PyYAML = {version = ">=3.10", optional = true, markers = "extra == \"yaml\""}
 
 [package.extras]
-tests = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock"]
+dev = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)", "tox"]
 docs = ["marshmallow (>=3.0.0)", "pyyaml (==5.4.1)", "sphinx (==3.4.3)", "sphinx-issues (==1.2.0)", "sphinx-rtd-theme (==0.5.1)"]
 lint = ["flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
-dev = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)", "tox"]
-yaml = ["PyYAML (>=3.10)"]
+tests = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock"]
 validation = ["prance[osv] (>=0.11)"]
+yaml = ["PyYAML (>=3.10)"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "apispec-webframeworks"
@@ -37,9 +47,14 @@ python-versions = ">=3.6"
 apispec = {version = ">=2.0.0", extras = ["yaml"]}
 
 [package.extras]
-tests = ["pytest", "mock", "Flask (==1.1.1)", "tornado", "bottle (==0.12.17)"]
-lint = ["flake8 (==3.7.9)", "flake8-bugbear (==19.8.0)", "pre-commit (>=1.18,<2.0)"]
 dev = ["pytest", "mock", "Flask (==1.1.1)", "tornado", "bottle (==0.12.17)", "flake8 (==3.7.9)", "flake8-bugbear (==19.8.0)", "pre-commit (>=1.18,<2.0)", "tox"]
+lint = ["flake8 (==3.7.9)", "flake8-bugbear (==19.8.0)", "pre-commit (>=1.18,<2.0)"]
+tests = ["pytest", "mock", "Flask (==1.1.1)", "tornado", "bottle (==0.12.17)"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "appdirs"
@@ -49,6 +64,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "astroid"
 version = "2.4.2"
@@ -59,10 +79,15 @@ python-versions = ">=3.5"
 
 [package.dependencies]
 lazy-object-proxy = ">=1.4.0,<1.5.0"
-typed-ast = {version = ">=1.4.0,<1.5", markers = "implementation_name == \"cpython\" and python_version < \"3.8\""}
 six = ">=1.12,<2.0"
+typed-ast = {version = ">=1.4.0,<1.5", markers = "implementation_name == \"cpython\" and python_version < \"3.8\""}
 wrapt = ">=1.11,<2.0"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "atomicwrites"
 version = "1.4.0"
@@ -71,6 +96,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "attrs"
 version = "20.3.0"
@@ -80,10 +110,15 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
 docs = ["furo", "sphinx", "zope.interface"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "babel"
@@ -96,6 +131,11 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [package.dependencies]
 pytz = ">=2015.7"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "black"
 version = "18.9b0"
@@ -105,14 +145,19 @@ optional = false
 python-versions = ">=3.6"
 
 [package.dependencies]
-toml = ">=0.9.4"
-attrs = ">=17.4.0"
 appdirs = "*"
+attrs = ">=17.4.0"
 click = ">=6.5"
+toml = ">=0.9.4"
 
 [package.extras]
 d = ["aiohttp (>=3.3.2)"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "camera-stage-mapping"
 version = "0.1.4"
@@ -125,8 +170,13 @@ python-versions = ">=3.6,<4.0"
 numpy = ">=1.17,<2.0"
 
 [package.extras]
-all = ["opencv-python-headless (>=4.1,<5.0)", "scipy (>=1.4,<2.0)"]
 correlation = ["opencv-python-headless (>=4.1,<5.0)", "scipy (>=1.4,<2.0)"]
+all = ["opencv-python-headless (>=4.1,<5.0)", "scipy (>=1.4,<2.0)"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "certifi"
@@ -136,6 +186,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "chardet"
 version = "4.0.0"
@@ -144,6 +199,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "click"
 version = "7.1.2"
@@ -152,6 +212,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "colorama"
 version = "0.4.4"
@@ -160,6 +225,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "colorzero"
 version = "1.1"
@@ -169,8 +239,13 @@ optional = false
 python-versions = "*"
 
 [package.extras]
-test = ["pytest", "coverage", "mock"]
 doc = ["sphinx"]
+test = ["pytest", "coverage", "mock"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "coverage"
@@ -183,6 +258,11 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 [package.extras]
 toml = ["toml"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "docutils"
 version = "0.16"
@@ -191,6 +271,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "expiringdict"
 version = "1.2.1"
@@ -202,6 +287,11 @@ python-versions = "*"
 [package.extras]
 tests = ["dill", "coverage", "coveralls", "mock", "nose"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "flask"
 version = "1.1.2"
@@ -211,15 +301,20 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
+click = ">=5.1"
 itsdangerous = ">=0.24"
 Jinja2 = ">=2.10.1"
-click = ">=5.1"
 Werkzeug = ">=0.15"
 
 [package.extras]
-dotenv = ["python-dotenv"]
-docs = ["sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
 dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
+docs = ["sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
+dotenv = ["python-dotenv"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "flask-cors"
@@ -233,6 +328,11 @@ python-versions = "*"
 Flask = ">=0.9"
 Six = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "freezegun"
 version = "1.1.0"
@@ -244,6 +344,11 @@ python-versions = ">=3.5"
 [package.dependencies]
 python-dateutil = ">=2.7"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "future"
 version = "0.18.2"
@@ -252,6 +357,11 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "idna"
 version = "2.10"
@@ -260,6 +370,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "ifaddr"
 version = "0.1.7"
@@ -268,6 +383,11 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "imagesize"
 version = "1.2.0"
@@ -276,6 +396,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "importlib-metadata"
 version = "3.4.0"
@@ -292,6 +417,11 @@ zipp = ">=0.5"
 docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
@@ -300,6 +430,11 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "isort"
 version = "5.7.0"
@@ -310,8 +445,13 @@ python-versions = ">=3.6,<4.0"
 
 [package.extras]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
+requirements_deprecated_finder = ["pip-api", "pipreqs"]
 pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
-requirements_deprecated_finder = ["pipreqs", "pip-api"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "itsdangerous"
@@ -321,6 +461,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "jinja2"
 version = "2.11.3"
@@ -335,6 +480,11 @@ MarkupSafe = ">=0.23"
 [package.extras]
 i18n = ["Babel (>=0.8)"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "labthings"
 version = "1.2.3"
@@ -344,13 +494,18 @@ optional = false
 python-versions = ">=3.6,<4.0"
 
 [package.dependencies]
-apispec_webframeworks = ">=0.5.2,<0.6.0"
-webargs = ">=6,<8"
-marshmallow = ">=3.4.0,<4.0.0"
-Flask = ">=1.1.1,<2.0.0"
 apispec = ">=3.2,<5.0"
-zeroconf = ">=0.24.5,<0.29.0"
+apispec_webframeworks = ">=0.5.2,<0.6.0"
+Flask = ">=1.1.1,<2.0.0"
 flask-cors = ">=3.0.8,<4.0.0"
+marshmallow = ">=3.4.0,<4.0.0"
+webargs = ">=6,<8"
+zeroconf = ">=0.24.5,<0.29.0"
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "lazy-object-proxy"
@@ -360,6 +515,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "lxml"
 version = "4.6.2"
@@ -369,10 +529,15 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, != 3.4.*"
 
 [package.extras]
-source = ["Cython (>=0.29.7)"]
 cssselect = ["cssselect (>=0.7)"]
 html5 = ["html5lib"]
 htmlsoup = ["beautifulsoup4"]
+source = ["Cython (>=0.29.7)"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "markupsafe"
@@ -382,6 +547,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "marshmallow"
 version = "3.10.0"
@@ -391,10 +561,15 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-docs = ["sphinx (==3.3.1)", "sphinx-issues (==1.2.0)", "alabaster (==0.7.12)", "sphinx-version-warning (==1.1.2)", "autodocsumm (==0.2.2)"]
-tests = ["pytest", "pytz", "simplejson"]
-lint = ["mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
 dev = ["pytest", "pytz", "simplejson", "mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)", "tox"]
+docs = ["sphinx (==3.3.1)", "sphinx-issues (==1.2.0)", "alabaster (==0.7.12)", "sphinx-version-warning (==1.1.2)", "autodocsumm (==0.2.2)"]
+lint = ["mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
+tests = ["pytest", "pytz", "simplejson"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "mccabe"
@@ -404,6 +579,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "mypy"
 version = "0.790"
@@ -420,6 +600,11 @@ typing-extensions = ">=3.7.4"
 [package.extras]
 dmypy = ["psutil (>=4.0)"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "mypy-extensions"
 version = "0.4.3"
@@ -428,6 +613,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "numpy"
 version = "1.19.2"
@@ -436,18 +626,23 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "numpy-stubs"
 version = "0.0.1"
-description = "PEP 561 type stubs for numpy"
+description = ""
 category = "main"
 optional = false
 python-versions = "*"
 develop = false
 
 [package.dependencies]
-typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 numpy = ">=1.16.0"
+typing_extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [package.source]
 type = "git"
@@ -457,12 +652,20 @@ resolved_reference = "c49d2d6875971a669a166ea93ef998911af283a1"
 
 [[package]]
 name = "opencv-python-headless"
-version = "4.4.0.44"
+version = "4.5.1.48"
 description = "Wrapper package for OpenCV python bindings."
 category = "main"
 optional = false
 python-versions = ">=3.6"
 
+[package.dependencies]
+numpy = ">=1.14.5"
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "packaging"
 version = "20.9"
@@ -474,6 +677,11 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [package.dependencies]
 pyparsing = ">=2.0.2"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pastel"
 version = "0.2.1"
@@ -482,6 +690,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "picamerax"
 version = "20.9.1"
@@ -494,9 +707,14 @@ python-versions = "*"
 colorzero = "*"
 
 [package.extras]
-test = ["coverage", "pytest", "mock", "pillow", "numpy"]
-doc = ["sphinx"]
 array = ["numpy"]
+doc = ["sphinx"]
+test = ["coverage", "pytest", "mock", "pillow", "numpy"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "piexif"
@@ -506,6 +724,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pillow"
 version = "7.2.0"
@@ -514,6 +737,11 @@ category = "main"
 optional = false
 python-versions = ">=3.5"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pluggy"
 version = "0.13.1"
@@ -528,6 +756,11 @@ importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 [package.extras]
 dev = ["pre-commit", "tox"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "poethepoet"
 version = "0.9.0"
@@ -540,6 +773,11 @@ python-versions = ">=3.6,<4.0"
 pastel = ">=0.2.0,<0.3.0"
 tomlkit = ">=0.6.0,<1.0.0"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "psutil"
 version = "5.8.0"
@@ -551,6 +789,11 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [package.extras]
 test = ["ipaddress", "mock", "unittest2", "enum34", "pywin32", "wmi"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "py"
 version = "1.10.0"
@@ -559,28 +802,43 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pygments"
-version = "2.7.4"
+version = "2.8.0"
 description = "Pygments is a syntax highlighting package written in Python."
 category = "dev"
 optional = false
 python-versions = ">=3.5"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pylint"
-version = "2.6.0"
+version = "2.6.2"
 description = "python code static checker"
 category = "dev"
 optional = false
 python-versions = ">=3.5.*"
 
 [package.dependencies]
-astroid = ">=2.4.0,<=2.5"
-mccabe = ">=0.6,<0.7"
+astroid = ">=2.4.0,<2.5"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
-toml = ">=0.7.1"
 isort = ">=4.2.5,<6"
+mccabe = ">=0.6,<0.7"
+toml = ">=0.7.1"
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "pyparsing"
@@ -590,6 +848,11 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pyserial"
 version = "3.5"
@@ -601,6 +864,11 @@ python-versions = "*"
 [package.extras]
 cp2110 = ["hidapi"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pytest"
 version = "6.2.2"
@@ -610,19 +878,24 @@ optional = false
 python-versions = ">=3.6"
 
 [package.dependencies]
-packaging = "*"
-py = ">=1.8.2"
-iniconfig = "*"
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
-colorama = {version = "*", markers = "sys_platform == \"win32\""}
-attrs = ">=19.2.0"
-toml = "*"
-pluggy = ">=0.12,<1.0.0a1"
 atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
+attrs = ">=19.2.0"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<1.0.0a1"
+py = ">=1.8.2"
+toml = "*"
 
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pytest-cov"
 version = "2.11.1"
@@ -632,12 +905,17 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-pytest = ">=4.6"
 coverage = ">=5.2.1"
+pytest = ">=4.6"
 
 [package.extras]
 testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "python-dateutil"
 version = "2.8.1"
@@ -649,6 +927,11 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 [package.dependencies]
 six = ">=1.5"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pytz"
 version = "2021.1"
@@ -657,14 +940,24 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "pyyaml"
-version = "5.4.1"
+version = "5.4"
 description = "YAML parser and emitter for Python"
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "requests"
 version = "2.25.1"
@@ -674,15 +967,20 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-idna = ">=2.5,<3"
 certifi = ">=2017.4.17"
 chardet = ">=3.0.2,<5"
+idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "rope"
 version = "0.14.0"
@@ -691,6 +989,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "rpi.gpio"
 version = "0.7.0"
@@ -699,6 +1002,11 @@ category = "main"
 optional = true
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "sangaboard"
 version = "0.2.3"
@@ -712,16 +1020,26 @@ future = "*"
 numpy = "*"
 pyserial = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "scipy"
-version = "1.5.3"
+version = "1.6.1"
 description = "SciPy: Scientific Library for Python"
 category = "main"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
-numpy = ">=1.14.5"
+numpy = ">=1.16.5"
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "six"
@@ -731,6 +1049,11 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "snowballstemmer"
 version = "2.1.0"
@@ -739,36 +1062,46 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "sphinx"
-version = "3.4.3"
+version = "3.5.1"
 description = "Python documentation generator"
 category = "dev"
 optional = false
 python-versions = ">=3.5"
 
 [package.dependencies]
-sphinxcontrib-qthelp = "*"
-imagesize = "*"
-sphinxcontrib-devhelp = "*"
-snowballstemmer = ">=1.1"
-babel = ">=1.3"
 alabaster = ">=0.7,<0.8"
-sphinxcontrib-serializinghtml = "*"
-packaging = "*"
-docutils = ">=0.12"
-Pygments = ">=2.0"
-Jinja2 = ">=2.3"
+babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
+docutils = ">=0.12"
+imagesize = "*"
+Jinja2 = ">=2.3"
+packaging = "*"
+Pygments = ">=2.0"
 requests = ">=2.5.0"
+snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
+sphinxcontrib-devhelp = "*"
 sphinxcontrib-htmlhelp = "*"
 sphinxcontrib-jsmath = "*"
+sphinxcontrib-qthelp = "*"
+sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
-test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.790)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.800)", "docutils-stubs"]
+test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "sphinxcontrib-applehelp"
@@ -779,8 +1112,13 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-test = ["pytest"]
 lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "sphinxcontrib-devhelp"
@@ -791,8 +1129,13 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-test = ["pytest"]
 lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "sphinxcontrib-htmlhelp"
@@ -803,8 +1146,13 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-test = ["pytest", "html5lib"]
 lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest", "html5lib"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "sphinxcontrib-httpdomain"
@@ -818,6 +1166,11 @@ python-versions = "*"
 six = "*"
 Sphinx = ">=1.5"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "sphinxcontrib-jsmath"
 version = "1.0.1"
@@ -829,6 +1182,11 @@ python-versions = ">=3.5"
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "sphinxcontrib-qthelp"
 version = "1.0.3"
@@ -838,8 +1196,13 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-test = ["pytest"]
 lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "sphinxcontrib-serializinghtml"
@@ -850,8 +1213,13 @@ optional = false
 python-versions = ">=3.5"
 
 [package.extras]
-test = ["pytest"]
 lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "toml"
@@ -861,6 +1229,11 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "tomlkit"
 version = "0.7.0"
@@ -869,6 +1242,11 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "typed-ast"
 version = "1.4.2"
@@ -877,6 +1255,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "typing-extensions"
 version = "3.7.4.3"
@@ -885,6 +1268,11 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "urllib3"
 version = "1.26.3"
@@ -898,6 +1286,11 @@ brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
 socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "webargs"
 version = "7.0.1"
@@ -910,11 +1303,16 @@ python-versions = ">=3.6"
 marshmallow = ">=3.0.0"
 
 [package.extras]
-docs = ["Sphinx (==3.3.1)", "sphinx-issues (==1.2.0)", "sphinx-typlog-theme (==0.8.0)", "Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)"]
-tests = ["pytest", "webtest (==2.0.35)", "webtest-aiohttp (==2.0.0)", "pytest-aiohttp (>=0.3.0)", "Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)"]
-lint = ["mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
 dev = ["pytest", "webtest (==2.0.35)", "webtest-aiohttp (==2.0.0)", "pytest-aiohttp (>=0.3.0)", "Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)", "mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)", "tox"]
+docs = ["Sphinx (==3.3.1)", "sphinx-issues (==1.2.0)", "sphinx-typlog-theme (==0.8.0)", "Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)"]
 frameworks = ["Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)"]
+lint = ["mypy (==0.790)", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
+tests = ["pytest", "webtest (==2.0.35)", "webtest-aiohttp (==2.0.0)", "pytest-aiohttp (>=0.3.0)", "Flask (>=0.12.5)", "Django (>=2.2.0)", "bottle (>=0.12.13)", "tornado (>=4.5.2)", "pyramid (>=1.9.1)", "falcon (>=2.0.0)", "aiohttp (>=3.0.8)"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "werkzeug"
@@ -925,8 +1323,13 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.extras]
-watchdog = ["watchdog"]
 dev = ["pytest", "pytest-timeout", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-issues"]
+watchdog = ["watchdog"]
+
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
 
 [[package]]
 name = "wrapt"
@@ -936,6 +1339,11 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "zeroconf"
 version = "0.28.8"
@@ -947,6 +1355,11 @@ python-versions = "*"
 [package.dependencies]
 ifaddr = ">=0.1.7"
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [[package]]
 name = "zipp"
 version = "3.4.0"
@@ -959,660 +1372,304 @@ python-versions = ">=3.6"
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
+[package.source]
+type = "legacy"
+url = "https://www.piwheels.org/simple"
+reference = "piwheels"
+
 [extras]
 rpi = ["RPi.GPIO"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7.3"
-content-hash = "701b37eec89567411e3263227a4f23a3372c09feb511cfe491fb0e1cbe14b555"
+content-hash = "7144f1f0652692911988bfc402489aa1d693d818e4152c57dca592d1c4f65fe1"
 
 [metadata.files]
 alabaster = [
     {file = "alabaster-0.7.12-py2.py3-none-any.whl", hash = "sha256:446438bdcca0e05bd45ea2de1668c1d9b032e1a9154c2c259092d77031ddd359"},
-    {file = "alabaster-0.7.12.tar.gz", hash = "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"},
 ]
 apispec = [
     {file = "apispec-4.3.0-py2.py3-none-any.whl", hash = "sha256:83e4d30edce987f4791f950c847d2b8cbe91e55af3d1ac7e3a35011a5c6fdbdd"},
-    {file = "apispec-4.3.0.tar.gz", hash = "sha256:5ec0fe72f1422a1198973fcbb48d0eb5c7390f4b0fbe55474fce999ad6826a9b"},
 ]
 apispec-webframeworks = [
-    {file = "apispec-webframeworks-0.5.2.tar.gz", hash = "sha256:0db35b267914b3f8c562aca0261957dbcb4176f255eacc22520277010818dcf3"},
     {file = "apispec_webframeworks-0.5.2-py2.py3-none-any.whl", hash = "sha256:482c563abbcc2a261439476cb3f1a7c7284cc997c322c574d48c111643e9c04e"},
 ]
 appdirs = [
     {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
-    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
 ]
 astroid = [
-    {file = "astroid-2.4.2-py3-none-any.whl", hash = "sha256:bc58d83eb610252fd8de6363e39d4f1d0619c894b0ed24603b881c02e64c7386"},
-    {file = "astroid-2.4.2.tar.gz", hash = "sha256:2f4078c2a41bf377eea06d71c9d2ba4eb8f6b1af2135bec27bbbb7d8f12bb703"},
+    {file = "astroid-2.4.2-py3-none-any.whl", hash = "sha256:ba1e4f22868598dd8d6871a7db5f6c2acf974855fed93d2e3ababadb399962b3"},
 ]
 atomicwrites = [
     {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
-    {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
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+    {file = "typed_ast-1.4.2-cp37-cp37m-linux_armv6l.whl", hash = "sha256:a93908d202f52ec64e24a41031f1336a14b66706be2c9e51949647f7ac4cbd22"},
+    {file = "typed_ast-1.4.2-cp37-cp37m-linux_armv7l.whl", hash = "sha256:a93908d202f52ec64e24a41031f1336a14b66706be2c9e51949647f7ac4cbd22"},
 ]
 typing-extensions = [
-    {file = "typing_extensions-3.7.4.3-py2-none-any.whl", hash = "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"},
     {file = "typing_extensions-3.7.4.3-py3-none-any.whl", hash = "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918"},
-    {file = "typing_extensions-3.7.4.3.tar.gz", hash = "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c"},
 ]
 urllib3 = [
     {file = "urllib3-1.26.3-py2.py3-none-any.whl", hash = "sha256:1b465e494e3e0d8939b50680403e3aedaa2bc434b7d5af64dfd3c958d7f5ae80"},
-    {file = "urllib3-1.26.3.tar.gz", hash = "sha256:de3eedaad74a2683334e282005cd8d7f22f4d55fa690a2a1020a416cb0a47e73"},
 ]
 webargs = [
     {file = "webargs-7.0.1-py2.py3-none-any.whl", hash = "sha256:ce8c565789ece1584be7edba41617319eb75de59b2987958bee3f3fdb3669e60"},
-    {file = "webargs-7.0.1.tar.gz", hash = "sha256:2f3d883ce9f348fa884889440fcc1b207e7c67b04be5e90be00a5be73e2cd91d"},
 ]
 werkzeug = [
     {file = "Werkzeug-1.0.1-py2.py3-none-any.whl", hash = "sha256:2de2a5db0baeae7b2d2664949077c2ac63fbd16d98da0ff71837f7d1dea3fd43"},
-    {file = "Werkzeug-1.0.1.tar.gz", hash = "sha256:6c80b1e5ad3665290ea39320b91e1be1e0d5f60652b964a3070216de83d2e47c"},
 ]
 wrapt = [
-    {file = "wrapt-1.12.1.tar.gz", hash = "sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7"},
+    {file = "wrapt-1.12.1-cp34-cp34m-linux_armv6l.whl", hash = "sha256:c16fd7cad3d27a5db392ae0e6215533a912a7d3d83a40b8cf275744276989780"},
+    {file = "wrapt-1.12.1-cp34-cp34m-linux_armv7l.whl", hash = "sha256:c16fd7cad3d27a5db392ae0e6215533a912a7d3d83a40b8cf275744276989780"},
+    {file = "wrapt-1.12.1-cp35-cp35m-linux_armv6l.whl", hash = "sha256:1ba3a6bcb5014ed4d9c98afe8aa47b5ed320f84292b4f1b9f6afa0f4b2b91351"},
+    {file = "wrapt-1.12.1-cp35-cp35m-linux_armv7l.whl", hash = "sha256:1ba3a6bcb5014ed4d9c98afe8aa47b5ed320f84292b4f1b9f6afa0f4b2b91351"},
+    {file = "wrapt-1.12.1-cp37-cp37m-linux_armv6l.whl", hash = "sha256:d3294c918c5529e50b5454d39b589648d9baf6152e380067606d5566d71369a0"},
+    {file = "wrapt-1.12.1-cp37-cp37m-linux_armv7l.whl", hash = "sha256:d3294c918c5529e50b5454d39b589648d9baf6152e380067606d5566d71369a0"},
 ]
 zeroconf = [
     {file = "zeroconf-0.28.8-py3-none-any.whl", hash = "sha256:3608be2db58f6f0dc70665e02ab420fb8bf428016f2c78403d879e066ecc9bff"},
-    {file = "zeroconf-0.28.8.tar.gz", hash = "sha256:4be24a10aa9c73406f48d42a8b3b077c217b0e8d7ed1e57639630da520c25959"},
 ]
 zipp = [
     {file = "zipp-3.4.0-py3-none-any.whl", hash = "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108"},
-    {file = "zipp-3.4.0.tar.gz", hash = "sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index d7bccc65..81609ef2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,21 +28,31 @@ packages = [
     { include = "openflexure_microscope" },
 ]
 
+# Installing numpy/scipy/etc. from source is unlikely to work.
+# The block below forces Poetry to use piwheels.
+# We can add other repositories if we need them.
+# Setting default=true disables fallback to PyPI.
+
+[[tool.poetry.source]]
+name = "piwheels"
+url = "https://www.piwheels.org/simple"
+default = true
+
 [tool.poetry.dependencies]
 python = "^3.7.3"
 Flask = "^1.0"
 numpy = "1.19.2" # Exact version so we can guarantee a wheel
 Pillow = "^7.2.0"
-scipy = "1.5.3" # Exact version so we can guarantee a wheel
+scipy = "1.6.1" # Exact version so we can guarantee a wheel
 "RPi.GPIO" = { version = "^0.7.0", optional = true }
 python-dateutil = "^2.8"
 psutil = "^5.6.7" # Autostorage extension
-opencv-python-headless = "4.4.0.44"
+opencv-python-headless = "4.5.1.48"
 sangaboard = "^0.2"
 expiringdict = "^1.2.1"
 camera-stage-mapping = "0.1.4"
 picamerax = ">=20.9.1"
-pyyaml = "^5.3.1"
+pyyaml = "5.4.0" # pyyaml 5.4.1 is broken in piwheels
 pytest-cov = "^2.10.1"
 piexif = "^1.1.3"
 labthings = "^1.2.2"
@@ -64,7 +74,7 @@ pytest = "^6.1.2"
 mypy = "^0.790"
 poethepoet = "^0.9.0"
 freezegun = "^1.0.0"
-lxml = "^4.6.2"
+lxml = "^4.6.2" # Fix version so piwheels works
 
 [tool.black]
 exclude = '(\.eggs|\.git|\.venv|\venv|node_modules/)'