diff --git a/cJSON.c b/cJSON.c
index c78aac6..3d19525 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -37,13 +37,26 @@
 #pragma warning (disable : 4001)
 #endif
 
-#include <string.h>
-#include <stdio.h>
-#include <math.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <ctype.h>
-#include <float.h>
+#if defined(_CARIBOU_RTOS_)
+    #include <caribou/kernel/types.h>
+    #include <caribou/lib/errno.h>
+    #include <caribou/lib/strtof.h>
+    #include <caribou/lib/stdarg.h>
+    #include <caribou/lib/string.h>
+    #include <caribou/lib/stdio.h>
+    #include <caribou/lib/stddef.h>
+    #include <caribou/lib/stdint.h>
+    #include <caribou/lib/heap.h>
+    #define DBL_EPSILON 2.2204460492503131e-16
+#else
+    #include <string.h>
+    #include <stdio.h>
+    #include <math.h>
+    #include <stdlib.h>
+    #include <limits.h>
+    #include <ctype.h>
+    #include <float.h>
+#endif
 
 #ifdef ENABLE_LOCALES
 #include <locale.h>
@@ -106,11 +119,11 @@ CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item)
     return item->valuestring;
 }
 
-CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item) 
+CJSON_PUBLIC(real_t) cJSON_GetNumberValue(const cJSON * const item) 
 {
     if (!cJSON_IsNumber(item)) 
     {
-        return (double) NAN;
+        return (real_t) NAN;
     }
 
     return item->valuedouble;
@@ -174,10 +187,16 @@ static void * CJSON_CDECL internal_realloc(void *pointer, size_t size)
 {
     return realloc(pointer, size);
 }
+#define internal_strtod strtod
 #else
 #define internal_malloc malloc
 #define internal_free free
 #define internal_realloc realloc
+#if defined(_CARIBOU_RTOS_)
+#define internal_strtod strtof
+#else
+#define internal_strtod strtod
+#endif
 #endif
 
 /* strlen of character literals resolved at compile time */
@@ -304,7 +323,7 @@ typedef struct
 /* Parse the input text to generate a number, and populate the result into item. */
 static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
 {
-    double number = 0;
+    real_t number = 0;
     unsigned char *after_end = NULL;
     unsigned char number_c_string[64];
     unsigned char decimal_point = get_decimal_point();
@@ -350,7 +369,7 @@ static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_bu
 loop_end:
     number_c_string[i] = '\0';
 
-    number = strtod((const char*)number_c_string, (char**)&after_end);
+    number = internal_strtod((const char*)number_c_string, (char**)&after_end);
     if (number_c_string == after_end)
     {
         return false; /* parse_error */
@@ -363,7 +382,7 @@ loop_end:
     {
         item->valueint = INT_MAX;
     }
-    else if (number <= (double)INT_MIN)
+    else if (number <= (real_t)INT_MIN)
     {
         item->valueint = INT_MIN;
     }
@@ -378,14 +397,14 @@ loop_end:
     return true;
 }
 
-/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
-CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number)
+/* don't ask me, but the original cJSON_SetNumberValue returns an integer or real_t */
+CJSON_PUBLIC(real_t) cJSON_SetNumberHelper(cJSON *object, real_t number)
 {
     if (number >= INT_MAX)
     {
         object->valueint = INT_MAX;
     }
-    else if (number <= (double)INT_MIN)
+    else if (number <= (real_t)INT_MIN)
     {
         object->valueint = INT_MIN;
     }
@@ -535,9 +554,9 @@ static void update_offset(printbuffer * const buffer)
 }
 
 /* securely comparison of floating-point variables */
-static cJSON_bool compare_double(double a, double b)
+static cJSON_bool compare_double(real_t a, real_t b)
 {
-    double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b);
+    real_t maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b);
     return (fabs(a - b) <= maxVal * DBL_EPSILON);
 }
 
@@ -545,12 +564,12 @@ static cJSON_bool compare_double(double a, double b)
 static cJSON_bool print_number(const cJSON * const item, printbuffer * const output_buffer)
 {
     unsigned char *output_pointer = NULL;
-    double d = item->valuedouble;
+    real_t d = item->valuedouble;
     int length = 0;
     size_t i = 0;
     unsigned char number_buffer[26] = {0}; /* temporary buffer to print the number into */
     unsigned char decimal_point = get_decimal_point();
-    double test = 0.0;
+    real_t test = 0.0;
 
     if (output_buffer == NULL)
     {
@@ -571,8 +590,8 @@ static cJSON_bool print_number(const cJSON * const item, printbuffer * const out
         /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */
         length = sprintf((char*)number_buffer, "%1.15g", d);
 
-        /* Check whether the original double can be recovered */
-        if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || !compare_double((double)test, d))
+        /* Check whether the original real_t can be recovered */
+        if ((sscanf((char*)number_buffer, "%lg", &test) != 1) || !compare_double((real_t)test, d))
         {
             /* If not, print with 17 decimal places of precision */
             length = sprintf((char*)number_buffer, "%1.17g", d);
@@ -2124,7 +2143,7 @@ CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * co
     return NULL;
 }
 
-CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number)
+CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const real_t number)
 {
     cJSON *number_item = cJSON_CreateNumber(number);
     if (add_item_to_object(object, name, number_item, &global_hooks, false))
@@ -2421,7 +2440,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean)
     return item;
 }
 
-CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
+CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(real_t num)
 {
     cJSON *item = cJSON_New_Item(&global_hooks);
     if(item)
@@ -2434,7 +2453,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
         {
             item->valueint = INT_MAX;
         }
-        else if (num <= (double)INT_MIN)
+        else if (num <= (real_t)INT_MIN)
         {
             item->valueint = INT_MIN;
         }
@@ -2593,7 +2612,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
 
     for(i = 0; a && (i < (size_t)count); i++)
     {
-        n = cJSON_CreateNumber((double)numbers[i]);
+        n = cJSON_CreateNumber((real_t)numbers[i]);
         if(!n)
         {
             cJSON_Delete(a);
@@ -2617,7 +2636,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
     return a;
 }
 
-CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count)
+CJSON_PUBLIC(cJSON *) cJSON_Createreal_tArray(const real_t *numbers, int count)
 {
     size_t i = 0;
     cJSON *n = NULL;
diff --git a/cJSON.h b/cJSON.h
index 95a9cf6..0a3ca69 100644
--- a/cJSON.h
+++ b/cJSON.h
@@ -83,7 +83,14 @@ then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJ
 #define CJSON_VERSION_MINOR 7
 #define CJSON_VERSION_PATCH 15
 
-#include <stddef.h>
+#if defined(_CARIBOU_RTOS_)
+  #include <caribou/lib/stdint.h>
+  #include <caribou/lib/stddef.h>
+  typedef float real_t;
+#else
+  #include <stddef.h>
+  typedef double real_t;
+#endif
 
 /* cJSON Types: */
 #define cJSON_Invalid (0)
@@ -116,7 +123,7 @@ typedef struct cJSON
     /* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */
     int valueint;
     /* The item's number, if type==cJSON_Number */
-    double valuedouble;
+    real_t valuedouble;
 
     /* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
     char *string;
@@ -177,7 +184,7 @@ CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void);
 
 /* Check item type and return its value */
 CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item);
-CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item);
+CJSON_PUBLIC(real_t) cJSON_GetNumberValue(const cJSON * const item);
 
 /* These functions check the type of an item */
 CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item);
@@ -196,7 +203,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void);
 CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void);
 CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void);
 CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean);
-CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num);
+CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(real_t num);
 CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string);
 /* raw json */
 CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw);
@@ -215,7 +222,7 @@ CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child);
  * The parameter count cannot be greater than the number of elements in the number array, otherwise array access will be out of bounds.*/
 CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count);
 CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count);
-CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count);
+CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const real_t *numbers, int count);
 CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count);
 
 /* Append item to the specified array/object. */
@@ -265,7 +272,7 @@ CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * co
 CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name);
 CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name);
 CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean);
-CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number);
+CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const real_t number);
 CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string);
 CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw);
 CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name);
@@ -274,8 +281,8 @@ CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * c
 /* When assigning an integer value, it needs to be propagated to valuedouble too. */
 #define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number))
 /* helper for the cJSON_SetNumberValue macro */
-CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number);
-#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number))
+CJSON_PUBLIC(real_t) cJSON_SetNumberHelper(cJSON *object, real_t number);
+#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (real_t)number) : (number))
 /* Change the valuestring of a cJSON_String object, only takes effect when type of object is cJSON_String */
 CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring);