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--- access_from_lua_to_webhmi_itself [2023/03/02 10:37] – emozolyak
+++ access_from_lua_to_webhmi_itself [2023/03/02 10:56] (current) – [Getting meter data example] emozolyak
@@ Line 3: / Line 3: @@
 To access the WebHMI DB data via API, you have to generate API key in the setup menu and use it in your requests.
 You can use //localhost// address as a part of the resource address.
+{{ :api:setup-menu-api-key.png?direct |}}
+{{ :api:api-key-example.png?direct&800 |}}
+===== Getting meter data example =====
 <code lua>
@@ Line 10: / Line 16: @@
     c : setopt{ url = 'http://127.0.0.1/api/meters-log/',
               timeout = 15,
-              httpheader = {'X-WH-APIKEY: 4025D32205ADC52E8604690FFADFB4600B8D41AA',
+              httpheader = { 'X-WH-APIKEY: 4025D32205ADC52E8604690FFADFB4600B8D41AA',
                              'X-WH-START: ' .. startTime,
                              'X-WH-END: ' ..   endTime,
-                            --  'X-WH-SLICES: ' ..   30,
-                            --  'X-WH-REGISTERS: ' ..   meterId,
                              'Accept: application/json',
                              'Content-Type: application/json'
@@ Line 37: / Line 41: @@
 end
 </code>
+===== Getting graph data example  =====
+<code lua>
+function getGraphData(regId, startTime, endTime)
+    local c = cURL.easy_init()
+    c : setopt{ url = 'http://127.0.0.1/api/graph-data/',
+              timeout = 15,
+               httpheader = {'X-WH-APIKEY: 9833A5C553C5E05D944C28615EB252A6CB2E9322',
+                             'X-WH-START: ' .. startTime,
+                             'X-WH-END: ' ..   endTime,
+                             'X-WH-SLICES: ' ..   30,
+                             'X-WH-REGISTERS: ' ..   regId,
+                             'Accept: application/json',
+                             'Content-Type: application/json'
+                            }
+         }
+    local res = ""
+    c:perform{writefunction = function(str)
+            res = res .. str
+        end}
+    c : close()
+    if (res == '') or (res == '%[%]')then
+        ERROR('No data in response!')
+        return false
+    else
+        return res
+    end
+end
+</code>