diff --git a/libpldm/platform.h b/libpldm/platform.h
index 0cce1b4..0371d1c 100644
--- a/libpldm/platform.h
+++ b/libpldm/platform.h
@@ -12,8 +12,10 @@
 
 /* Maximum size for request */
 #define PLDM_SET_STATE_EFFECTER_STATES_REQ_BYTES 19
+#define PLDM_GET_STATE_SENSOR_READINGS_REQ_BYTES 4
 /* Response lengths are inclusive of completion code */
 #define PLDM_SET_STATE_EFFECTER_STATES_RESP_BYTES 1
+#define PLDM_GET_STATE_SENSOR_READINGS_RESP_BYTES 34
 
 #define PLDM_SET_NUMERIC_EFFECTER_VALUE_RESP_BYTES 1
 #define PLDM_SET_NUMERIC_EFFECTER_VALUE_MIN_REQ_BYTES 4
@@ -35,7 +37,33 @@
 
 enum effecter_state { PLDM_INVALID_VALUE = 0xFF };
 
+enum sensor_operational_state {
+	ENABLED = 0x00,
+	DISABLED = 0x01,
+	UNAVAILABLE = 0x02,
+	STATUSUNKNOWN = 0x03,
+	FAILED = 0x04,
+	INITIALIZING = 0x05,
+	SHUTTINGDOWN = 0x06,
+	INTEST = 0x07
+};
+
+enum present_state {
+	UNKNOWN = 0x0,
+	NORMAL = 0x01,
+	WARNING = 0x02,
+	CRITICAL = 0x03,
+	FATAL = 0x04,
+	LOWERWARNING = 0x05,
+	LOWERCRITICAL = 0x06,
+	LOWERFATAL = 0x07,
+	UPPERWARNING = 0x08,
+	UPPERCRITICAL = 0x09,
+	UPPERFATAL = 0x0a
+};
+
 enum pldm_platform_commands {
+	PLDM_GET_STATE_SENSOR_READINGS = 0x21,
 	PLDM_SET_NUMERIC_EFFECTER_VALUE = 0x31,
 	PLDM_SET_STATE_EFFECTER_STATES = 0x39,
 	PLDM_GET_PDR = 0x51,
@@ -127,6 +155,20 @@
 	uint8_t effecter_state; //!< Expected state of the effecter
 } __attribute__((packed)) set_effecter_state_field;
 
+/** @struct get_sensor_readings_field
+ *
+ *  Structure representing a stateField in GetStateSensorReadings command */
+
+typedef struct state_field_for_get_state_sensor_readings {
+	uint8_t sensor_op_state; //!< The state of the sensor itself
+	uint8_t present_state;   //!< Return a state value
+	uint8_t previous_state; //!< The state that the presentState was entered
+				//! from. This must be different from the
+				//! present state
+	uint8_t event_state;    //!< Return a state value from a PLDM State Set
+			     //! that is associated with the sensor
+} __attribute__((packed)) get_sensor_state_field;
+
 /** @struct PLDM_SetStateEffecterStates_Request
  *
  *  Structure representing PLDM set state effecter states request.
@@ -174,6 +216,26 @@
 	uint8_t effecter_value[1];
 } __attribute__((packed));
 
+/** @struct pldm_get_state_sensor_readings_req
+ *
+ *  Structure representing PLDM get state sensor readings request.
+ */
+struct pldm_get_state_sensor_readings_req {
+	uint16_t sensor_id;
+	bitfield8_t sensor_rearm;
+	uint8_t reserved;
+} __attribute__((packed));
+
+/** @struct pldm_get_state_sensor_readings_resp
+ *
+ *  Structure representing PLDM get state sensor readings response.
+ */
+struct pldm_get_state_sensor_readings_resp {
+	uint8_t completion_code;
+	uint8_t comp_sensor_count;
+	get_sensor_state_field field[1];
+} __attribute__((packed));
+
 /* Responder */
 
 /* SetNumericEffecterValue */
@@ -299,6 +361,48 @@
 		       uint8_t *transfer_op_flag, uint16_t *request_cnt,
 		       uint16_t *record_chg_num);
 
+/* GetStateSensorReadings */
+
+/** @brief Decode GetStateSensorReadings request data
+ *
+ *  @param[in] msg - Request message
+ *  @param[in] payload_length - Length of request message payload
+ *  @param[out] sensor_id - used to identify and access the simple or composite
+ *         sensor
+ *  @param[out] sensor_rearm - Each bit location in this field corresponds to a
+ *         particular sensor within the state sensor, where bit [0] corresponds
+ *         to the first state sensor (sensor offset 0) and bit [7] corresponds
+ *         to the eighth sensor (sensor offset 7), sequentially.
+ *  @param[out] reserved - value: 0x00
+ *  @return pldm_completion_codes
+ */
+
+int decode_get_state_sensor_readings_req(const struct pldm_msg *msg,
+					 size_t payload_length,
+					 uint16_t *sensor_id,
+					 bitfield8_t *sensor_rearm,
+					 uint8_t *reserved);
+
+/** @brief Encode GetStateSensorReadings response data
+ *
+ *  @param[in] instance_id - Message's instance id
+ *  @param[in] completion_code - PLDM completion code
+ *  @param[out] comp_sensor_count - The number of individual sets of sensor
+ *         information that this command accesses
+ *  @param[out] field - Each stateField is an instance of a stateField structure
+ *         that is used to return the present operational state setting and the
+ *         present state and event state for a particular set of sensor
+ *         information contained within the state sensor
+ *  @param[out] msg - Message will be written to this
+ *  @return pldm_completion_codes
+ */
+
+int encode_get_state_sensor_readings_resp(uint8_t instance_id,
+					  uint8_t completion_code,
+					  uint8_t comp_sensor_count,
+					  get_sensor_state_field *field,
+					  struct pldm_msg *msg);
+
 /* Requester */
 
 /* GetPDR */
@@ -433,6 +537,48 @@
 					   size_t payload_length,
 					   uint8_t *completion_code);
 
+/** @brief Create a PLDM request message for GetStateSensorReadings
+ *
+ *  @param[in] instance_id - Message's instance id
+ *  @param[in] sensor_id - used to identify and access the simple or composite
+ *         sensor
+ *  @param[in] sensorRearm - Each bit location in this field corresponds to a
+ *         particular sensor within the state sensor, where bit [0] corresponds
+ *         to the first state sensor (sensor offset 0) and bit [7] corresponds
+ *         to the eighth sensor (sensor offset 7), sequentially
+ *  @param[in] reserved - value: 0x00
+ *  @param[out] msg - Message will be written to this
+ *  @return pldm_completion_codes
+ *  @note  Caller is responsible for memory alloc and dealloc of param
+ *         'msg.payload'
+ */
+
+int encode_get_state_sensor_readings_req(uint8_t instance_id,
+					 uint16_t sensor_id,
+					 bitfield8_t sensor_rearm,
+					 uint8_t reserved,
+					 struct pldm_msg *msg);
+
+/** @brief Decode GetStateSensorReadings response data
+ *
+ *  @param[in] msg - Request message
+ *  @param[in] payload_length - Length of response message payload
+ *  @param[out] completion_code - PLDM completion code
+ *  @param[in,out] comp_sensor_count - The number of individual sets of sensor
+ *         information that this command accesses
+ *  @param[out] field - Each stateField is an instance of a stateField structure
+ *         that is used to return the present operational state setting and the
+ *         present state and event state for a particular set of sensor
+ *         information contained within the state sensor
+ *  @return pldm_completion_codes
+ */
+
+int decode_get_state_sensor_readings_resp(const struct pldm_msg *msg,
+					  size_t payload_length,
+					  uint8_t *completion_code,
+					  uint8_t *comp_sensor_count,
+					  get_sensor_state_field *field);
+
 #ifdef __cplusplus
 }
 #endif