diff --git a/include/sensorutils.hpp b/include/sensorutils.hpp
new file mode 100644
index 0000000..5b9fbb2
--- /dev/null
+++ b/include/sensorutils.hpp
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c)  2018 Intel Corporation.
+ * Copyright (c)  2018-present Facebook.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+#include <ipmid/api.h>
+
+#include <cmath>
+#include <iostream>
+#include <phosphor-logging/log.hpp>
+
+namespace ipmi
+{
+
+static constexpr int16_t maxInt10 = 0x1FF;
+static constexpr int16_t minInt10 = -0x200;
+static constexpr int8_t maxInt4 = 7;
+static constexpr int8_t minInt4 = -8;
+
+enum class SensorUnits : uint8_t
+{
+    unspecified = 0x0,
+    degreesC = 0x1,
+    volts = 0x4,
+    amps = 0x5,
+    watts = 0x6,
+    rpm = 0x12,
+};
+
+enum class SensorTypeCodes : uint8_t
+{
+    reserved = 0x0,
+    temperature = 0x1,
+    voltage = 0x2,
+    current = 0x3,
+    fan = 0x4,
+    other = 0xB,
+};
+
+struct CmpStrVersion
+{
+    bool operator()(std::string a, std::string b) const
+    {
+        return strverscmp(a.c_str(), b.c_str()) < 0;
+    }
+};
+
+using SensorSubTree = boost::container::flat_map<
+    std::string,
+    boost::container::flat_map<std::string, std::vector<std::string>>,
+    CmpStrVersion>;
+
+inline static bool getSensorSubtree(SensorSubTree &subtree)
+{
+    sd_bus *bus = NULL;
+    int ret = sd_bus_default_system(&bus);
+    if (ret < 0)
+    {
+        phosphor::logging::log<phosphor::logging::level::ERR>(
+            "Failed to connect to system bus",
+            phosphor::logging::entry("ERRNO=0x%X", -ret));
+        sd_bus_unref(bus);
+        return false;
+    }
+    sdbusplus::bus::bus dbus(bus);
+    auto mapperCall =
+        dbus.new_method_call("xyz.openbmc_project.ObjectMapper",
+                             "/xyz/openbmc_project/object_mapper",
+                             "xyz.openbmc_project.ObjectMapper", "GetSubTree");
+    static constexpr const auto depth = 2;
+    static constexpr std::array<const char *, 3> interfaces = {
+        "xyz.openbmc_project.Sensor.Value",
+        "xyz.openbmc_project.Sensor.Threshold.Warning",
+        "xyz.openbmc_project.Sensor.Threshold.Critical"};
+    mapperCall.append("/xyz/openbmc_project/sensors", depth, interfaces);
+
+    try
+    {
+        auto mapperReply = dbus.call(mapperCall);
+        subtree.clear();
+        mapperReply.read(subtree);
+    }
+    catch (sdbusplus::exception_t &e)
+    {
+        phosphor::logging::log<phosphor::logging::level::ERR>(e.what());
+        return false;
+    }
+    return true;
+}
+
+// Specify the comparison required to sort and find char* map objects
+struct CmpStr
+{
+    bool operator()(const char *a, const char *b) const
+    {
+        return std::strcmp(a, b) < 0;
+    }
+};
+
+const static boost::container::flat_map<const char *, SensorUnits, CmpStr>
+    sensorUnits{{{"temperature", SensorUnits::degreesC},
+                 {"voltage", SensorUnits::volts},
+                 {"current", SensorUnits::amps},
+                 {"fan_tach", SensorUnits::rpm},
+                 {"power", SensorUnits::watts}}};
+
+const static boost::container::flat_map<const char *, SensorTypeCodes, CmpStr>
+    sensorTypes{{{"temperature", SensorTypeCodes::temperature},
+                 {"voltage", SensorTypeCodes::voltage},
+                 {"current", SensorTypeCodes::current},
+                 {"fan_tach", SensorTypeCodes::fan},
+                 {"fan_pwm", SensorTypeCodes::fan},
+                 {"power", SensorTypeCodes::other}}};
+
+inline static std::string getSensorTypeStringFromPath(const std::string &path)
+{
+    // get sensor type string from path, path is defined as
+    // /xyz/openbmc_project/sensors/<type>/label
+    size_t typeEnd = path.rfind("/");
+    if (typeEnd == std::string::npos)
+    {
+        return path;
+    }
+    size_t typeStart = path.rfind("/", typeEnd - 1);
+    if (typeStart == std::string::npos)
+    {
+        return path;
+    }
+    // Start at the character after the '/'
+    typeStart++;
+    return path.substr(typeStart, typeEnd - typeStart);
+}
+
+inline static uint8_t getSensorTypeFromPath(const std::string &path)
+{
+    uint8_t sensorType = 0;
+    std::string type = getSensorTypeStringFromPath(path);
+    auto findSensor = sensorTypes.find(type.c_str());
+    if (findSensor != sensorTypes.end())
+    {
+        sensorType = static_cast<uint8_t>(findSensor->second);
+    } // else default 0x0 RESERVED
+
+    return sensorType;
+}
+
+inline static uint8_t getSensorEventTypeFromPath(const std::string &path)
+{
+    // TODO: Add support for additional reading types as needed
+    return 0x1; // reading type = threshold
+}
+
+static inline bool getSensorAttributes(const double max, const double min,
+                                       int16_t &mValue, int8_t &rExp,
+                                       int16_t &bValue, int8_t &bExp,
+                                       bool &bSigned)
+{
+    // computing y = (10^rRexp) * (Mx + (B*(10^Bexp)))
+    // check for 0, assume always positive
+    double mDouble;
+    double bDouble;
+    if (max <= min)
+    {
+        phosphor::logging::log<phosphor::logging::level::DEBUG>(
+            "getSensorAttributes: Max must be greater than min");
+        return false;
+    }
+
+    mDouble = (max - min) / 0xFF;
+
+    if (min < 0)
+    {
+        bSigned = true;
+        bDouble = floor(0.5 + ((max + min) / 2));
+    }
+    else
+    {
+        bSigned = false;
+        bDouble = min;
+    }
+
+    rExp = 0;
+
+    // M too big for 10 bit variable
+    while (mDouble > maxInt10)
+    {
+        if (rExp >= maxInt4)
+        {
+            phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                "rExp Too big, Max and Min range too far",
+                phosphor::logging::entry("REXP=%d", rExp));
+            return false;
+        }
+        mDouble /= 10;
+        rExp++;
+    }
+
+    // M too small, loop until we lose less than 1 eight bit count of precision
+    while (((mDouble - floor(mDouble)) / mDouble) > (1.0 / 255))
+    {
+        if (rExp <= minInt4)
+        {
+            phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                "rExp Too Small, Max and Min range too close");
+            return false;
+        }
+        // check to see if we reached the limit of where we can adjust back the
+        // B value
+        if (bDouble / std::pow(10, rExp + minInt4 - 1) > bDouble)
+        {
+            if (mDouble < 1.0)
+            {
+                phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                    "Could not find mValue and B value with enough "
+                    "precision.");
+                return false;
+            }
+            break;
+        }
+        // can't multiply M any more, max precision reached
+        else if (mDouble * 10 > maxInt10)
+        {
+            break;
+        }
+        mDouble *= 10;
+        rExp--;
+    }
+
+    bDouble /= std::pow(10, rExp);
+    bExp = 0;
+
+    // B too big for 10 bit variable
+    while (bDouble > maxInt10 || bDouble < minInt10)
+    {
+        if (bExp >= maxInt4)
+        {
+            phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                "bExp Too Big, Max and Min range need to be adjusted");
+            return false;
+        }
+        bDouble /= 10;
+        bExp++;
+    }
+
+    while (((fabs(bDouble) - floor(fabs(bDouble))) / fabs(bDouble)) >
+           (1.0 / 255))
+    {
+        if (bExp <= minInt4)
+        {
+            phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                "bExp Too Small, Max and Min range need to be adjusted");
+            return false;
+        }
+        bDouble *= 10;
+        bExp -= 1;
+    }
+
+    mValue = static_cast<int16_t>(mDouble) & maxInt10;
+    bValue = static_cast<int16_t>(bDouble) & maxInt10;
+
+    return true;
+}
+
+static inline uint8_t
+    scaleIPMIValueFromDouble(const double value, const uint16_t mValue,
+                             const int8_t rExp, const uint16_t bValue,
+                             const int8_t bExp, const bool bSigned)
+{
+    uint32_t scaledValue =
+        (value - (bValue * std::pow(10, bExp) * std::pow(10, rExp))) /
+        (mValue * std::pow(10, rExp));
+
+    if (scaledValue > std::numeric_limits<uint8_t>::max() ||
+        scaledValue < std::numeric_limits<uint8_t>::lowest())
+    {
+        throw std::out_of_range("Value out of range");
+    }
+    if (bSigned)
+    {
+        return static_cast<int8_t>(scaledValue);
+    }
+    else
+    {
+        return static_cast<uint8_t>(scaledValue);
+    }
+}
+
+static inline uint8_t getScaledIPMIValue(const double value, const double max,
+                                         const double min)
+{
+    int16_t mValue = 0;
+    int8_t rExp = 0;
+    int16_t bValue = 0;
+    int8_t bExp = 0;
+    bool bSigned = 0;
+    bool result = 0;
+
+    result = getSensorAttributes(max, min, mValue, rExp, bValue, bExp, bSigned);
+    if (!result)
+    {
+        throw std::runtime_error("Illegal sensor attributes");
+    }
+    return scaleIPMIValueFromDouble(value, mValue, rExp, bValue, bExp, bSigned);
+}
+} // namespace ipmi