diff --git a/Server_CoAP/CoAPthon3/exampleresources.py b/Server_CoAP/CoAPthon3/exampleresources.py
index 3d4d5ab56ffe7e7d1059af91e89a8f8d92ac231f..f568f2633b222e67b132ce26590105b1bed2e915 100644
--- a/Server_CoAP/CoAPthon3/exampleresources.py
+++ b/Server_CoAP/CoAPthon3/exampleresources.py
@@ -119,9 +119,9 @@ class RpNodeInfoResource(Resource):
                     return json.dumps(response)
                 
                 cosA = (math.pow(dis['b'], 2) + math.pow(dis['c'], 2) - math.pow(dis['a'], 2)) / (2 * dis['b'] * dis['c'])
-                if cosA >= 1 or cosA <= 0 :
+                if cosA >= 1 or cosA <= -1 :
                     # 3번째 rpNode를 만들 수 없는 경우
-                    print("3번째 rpNode를 만들 수 없습니다.(impossible cosA)")
+                    print("3번째 rpNode를 만들 수 없습니다.(impossible cosA)",cosA) 
                     response['operate'] = 1
                     return json.dumps(response)
 
@@ -158,8 +158,9 @@ class RpNodeInfoResource(Resource):
                     })
 
                 triangulationInst = triangulation.Triangulation(nodeList[:3])
-                x, y = triangulation.doTriangulation()
-
+                print("test : ", nodeList[:3])
+                x, y = triangulationInst.doTriangulation()
+                print("x: ",x,"y : ",y)
                 if x == None:
                     # 4번째 이상의 rpNode를 만들 수 없는 경우
                     print("4번째 이상의 rpNode를 만들 수 없습니다.")
diff --git a/Server_CoAP/CoAPthon3/triangulation.py b/Server_CoAP/CoAPthon3/triangulation.py
index d45c38d7b7d2cd4b0753a55e179a2faf7d90bdc7..486b73f033e44f2b00f239df9f5064cb8afe59b3 100644
--- a/Server_CoAP/CoAPthon3/triangulation.py
+++ b/Server_CoAP/CoAPthon3/triangulation.py
@@ -50,9 +50,11 @@ class Triangulation():
                 meet_result[0][0]=meet1[0][0]
                 meet_result[0][1]=meet1[0][1]
         else:
+            print(line_position)
             a=1+(line_position[0][0]/line_position[0][1])*(line_position[0][0]/line_position[0][1])
             b=(-2*a1)+((-2*line_position[0][0]*line_position[0][2]) / (line_position[0][1]*line_position[0][1]))+(2*line_position[0][0]*b1/line_position[0][1])
             c=(line_position[0][2]/line_position[0][1])*(line_position[0][2]/line_position[0][1]) + (-2*line_position[0][2]*b1/line_position[0][1]) + b1*b1 - r1*r1 + a1*a1
+            print("a : "+str(a)+"b : "+str(b)+"c : "+str(c)+"b^2-4ac : " + str(b*b-4*a*c))
             meet1[0][0]=(-b+math.sqrt(b*b-4*a*c))/(2*a)
             meet2[0][0]=(-b-math.sqrt(b*b-4*a*c))/(2*a)
             meet1[0][1]=(-1*line_position[0][0]*meet1[0][0]/line_position[0][1])+(line_position[0][2]/line_position[0][1])
@@ -221,15 +223,15 @@ class Triangulation():
         c=self.cal_distance(self.n[1]['x'],self.n[1]['y'],self.n[2]['x'],self.n[2]['y'])
         if(list[2]==self.n[0]['distance']):
             if(self.n[1]['distance']+a<=self.n[0]['distance'] or self.n[2]['distance']+b<=self.n[0]['distance']):
-                print("error")
+                print("error1")
                 return None, None
         elif(list[2]==self.n[1]['distance']):
             if(self.n[0]['distance']+a<=self.n[1]['distance'] or self.n[2]['distance']+c<=self.n[1]['distance']):
-                print("error")
+                print("error2")
                 return None, None
         elif(list[2]==self.n[2]['distance']):
             if(self.n[0]['distance']+b<=self.n[2]['distance'] or self.n[1]['distance']+c<=self.n[2]['distance']):
-                print("error")
+                print("error3")
                 return None, None
 
         if(a<=self.n[0]['distance']+self.n[1]['distance'] and b<=self.n[0]['distance']+self.n[2]['distance'] and c<=self.n[1]['distance']+self.n[2]['distance']):
@@ -249,7 +251,7 @@ class Triangulation():
             self.n[2]['x'],self.n[2]['y'],self.n[2]['distance'],
             self.n[0]['x'],self.n[0]['y'],self.n[0]['distance'])
         else:
-            print("error")
+            print("error4")
             return None, None
         return x, y
 """
diff --git a/Server_Vue_Express/backend/routes/api.js b/Server_Vue_Express/backend/routes/api.js
index 100fbac867f71f270435f407001fe528aa1e6e44..f9134728b6b09e320b86ae231aacfa67c723cab2 100644
--- a/Server_Vue_Express/backend/routes/api.js
+++ b/Server_Vue_Express/backend/routes/api.js
@@ -178,9 +178,9 @@ router.get('/aggregateByRPUUID/:id', function(req, res, next) {
         '$match': {
           'rpuuid': output.rpuuid, 
           'updateTime': {
-            '$gt': lastUpdateTime - 600
+            '$gt': lastUpdateTime 
           },
-          distance: {'$lt': 1}
+          distance: {'$lt': 10, '$gt' : 0.1}
         }
       }, {
         '$group': {