[sendtohttp] thingspeak only reply event

src/Custom-sample.h

@@ -25,6 +25,7 @@
 #define FEATURE_RULES_EASY_COLOR_CODE    1   // Use code highlighting, autocompletion and command suggestions in Rules
 #define FEATURE_ESPEASY_P2P       1     // (1/0) enables the ESP Easy P2P protocol
 #define FEATURE_ARDUINO_OTA       1     //enables the Arduino OTA capabilities
+#define FEATURE_THINGSPEAK_EVENT    1   // generate an event when requesting last value of a field in thingspeak via SendToHTTP(e.g. sendToHTTP,api.thingspeak.com,80,/channels/1667332/fields/5/last)
 // #define FEATURE_SD                1     // Enable SD card support
 // #define FEATURE_DOWNLOAD          1     // Enable downloading a file from an url
 

src/src/Helpers/Networking.cpp

@@ -1544,7 +1544,31 @@ int http_authenticate(const String& logIdentifier,
     event += '=';
     event += httpCode;
     eventQueue.addMove(std::move(event));
+    #if FEATURE_THINGSPEAK_EVENT
+      // Generate event with the response of a 
+      // "last-value-of-field" tingspeak request (https://de.mathworks.com/help/thingspeak/readlastfieldentry.html)
+      // e.g. (sendToHTTP,api.thingspeak.com,80,/channels/143789/fields/5/last)
+      // where first eventvalue is the channel number, the second the field number
+      // and the third is the value received by the request
+      // Example of received reply: "HTTP : SendToHTTP api.thingspeak.com GETHTTP code: 200 Received reply: 24.2"
+      // Example of the event: "EVENT: reply#thingspeak=1637928,5,24.2"
+      //                                                   ^    ^   ^
+      //                                    channel number ┘    |   └ received value
+      //                                                    field number 
+      // In rules you can grep the reply by "On ThingspeakReply# Do ..."
+      if (httpCode == 200 && equals(host, F("api.thingspeak.com")) && uri.endsWith(F("/last"))) {
+        String revent = F("ThingspeakReply#");
+        revent += '=';
+        revent += parseString(uri.c_str(), 2, '/');; //get the channel number
+        revent += ',';
+        revent += parseString(uri.c_str(), 4, '/');; //get the field number
+        revent += ',';
+        revent += http.getString().substring(0, 21);
+        eventQueue.addMove(std::move(revent));
+      }
+    #endif
   }
+
 #ifndef BUILD_NO_DEBUG
   log_http_result(http, logIdentifier, host + ':' + port, HttpMethod, httpCode, EMPTY_STRING);
 #endif