[sendtohttp] thingspeak only reply event

docs/source/Rules/Rules.rst

@@ -1969,6 +1969,48 @@ Added: 2022/07/23
 * Host name can contain user credentials. For example: ``http://username:pass@hostname:portnr/foo.html``
 * HTTP user credentials now can handle Basic Auth and Digest Auth.
 
+Added: 2023/10/26
+
+* ``SendToHTTP`` now generates an event with the response of a thingspeak request (https://de.mathworks.com/help/thingspeak/readlastfieldentry.html & // https://de.mathworks.com/help/thingspeak/readdata.html)
+* There are two options:
+
+  1. Get the value of a single field: 
+
+     - Example command:
+     	``SendToHTTP,api.thingspeak.com,80,/channels/1637928/fields/5/last.csv``
+     - Example of the resulting event:
+     	``"EVENT: ThingspeakReply=1637928,5,24.2"``
+
+        | channel number = ``%eventvalue1%``
+        | field number = ``%eventvalue2%``
+        | value = ``%eventvalue3%``
+
+  2. Get the values of all fields:
+
+     - Example command:
+     	``SendToHTTP,api.thingspeak.com,80,/channels/1637928/feeds/last.csv``
+     - Example of the resulting event:
+     	``"EVENT:ThingspeakReply=1637928,5929,353,42.0,177,19.1,995.6,,"``
+
+        | channel number = ``%eventvalue1%``
+        | values = ``%eventvalue2%`` to ``%eventvalue9%``
+
+.. warning:: When using the command for all fields, the reply can become extremely big and can lead to memory issues which results in instabilities of your device (especially when all eight fields are filled with very big numbers)
+
+* Example for two single field events in rules:
+
+.. code:: none
+
+  on ThinkspeakReply do
+    LogEntry,'The channel number is: %eventvalue1%'
+    if %eventvalue2% = 5			  //when the field number is 5
+      LogEntry,'%eventvalue3%°C in Berlin'
+    elseif %eventvalue2% = 6		//when the field number is 6
+      LogEntry,'%eventvalue3%°C in Paris'
+    endif
+  endon
+
+
 
 Convert curl POST command to PostToHTTP
 ---------------------------------------

src/Custom-sample.h

@@ -22,11 +22,12 @@
 // --- Feature Flagging ---------------------------------------------------------
 // Can be set to 1 to enable, 0 to disable, or not set to use the default (usually via define_plugin_sets.h)
 
-#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_SD                1     // Enable SD card support
-// #define FEATURE_DOWNLOAD          1     // Enable downloading a file from an url
+#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
 
 #ifdef BUILD_GIT
 # undef BUILD_GIT

src/src/CustomBuild/define_plugin_sets.h

@@ -3316,5 +3316,12 @@ To create/register a plugin, you have to :
 */
 
 
+  #ifndef FEATURE_THINGSPEAK_EVENT
+    #ifdef LIMIT_BUILD_SIZE
+      #define FEATURE_THINGSPEAK_EVENT 0
+    #else
+      #define FEATURE_THINGSPEAK_EVENT 1
+    #endif
+  #endif
 
 #endif // CUSTOMBUILD_DEFINE_PLUGIN_SETS_H

src/src/Helpers/Networking.cpp

@@ -1561,7 +1561,38 @@ int http_authenticate(const String& logIdentifier,
     // Generate event with the HTTP return code
     // e.g. http#hostname=401
     eventQueue.addMove(strformat(F("http#%s=%d"), host.c_str(), httpCode));
+
+    #if FEATURE_THINGSPEAK_EVENT
+      // Generate event with the response of a 
+      // thingspeak request (https://de.mathworks.com/help/thingspeak/readlastfieldentry.html &
+      // https://de.mathworks.com/help/thingspeak/readdata.html)
+      // e.g. command for a specific field: "sendToHTTP,api.thingspeak.com,80,/channels/1637928/fields/5/last.csv"
+      // command for all fields: "sendToHTTP,api.thingspeak.com,80,/channels/1637928/feeds/last.csv"
+      // where first eventvalue is the channel number and the second to the nineth event values 
+      // are the field values
+      // Example of the event: "EVENT: ThingspeakReply=1637928,5,24.2,12,900,..."
+      //                                                  ^    ^ └------┬------┘
+      //                                   channel number ┘    |        └ received values
+      //                                                   field number (only available for a "single-value-event")
+      // In rules you can grep the reply by "On ThingspeakReply Do ..."
+
+      if (httpCode == 200 && equals(host, F("api.thingspeak.com")) && uri.endsWith(F("/last.csv"))) {
+        String result = http.getString(); 
+        const int posTimestamp = result.lastIndexOf(':');
+        if (posTimestamp >= 0) { 
+          result = parseStringToEndKeepCase(result.substring(posTimestamp), 3);
+          if (uri.indexOf(F("fields")) >= 0) { //when there is a single field call add the field number before the value
+            result = parseStringKeepCase(uri, 4, '/') + "," + result;
+          }
+          eventQueue.addMove(strformat(
+            F("ThingspeakReply=%s,%s"),                                            
+            parseStringKeepCase(uri, 2, '/').c_str(),
+            result.c_str()));
+        }
+      }
+    #endif
   }
+
 #ifndef BUILD_NO_DEBUG
   log_http_result(http, logIdentifier, host + ':' + port, HttpMethod, httpCode, EMPTY_STRING);
 #endif

static/espeasy.js

@@ -8,7 +8,7 @@ var commonCommands = ["AccessInfo", "Background", "Build", "ClearAccessBlock", "
   "ControllerEnable", "DateTime", "Debug", "Dec", "DeepSleep", "DisablePriorityTask", "DNS", "DST", "EraseSDKWiFi", "ExecuteRules", "Gateway", "I2Cscanner", "Inc",
   "IP", "Let", "Load", "LogEntry", "LogPortStatus", "LoopTimerSet", "LoopTimerSet_ms", "MemInfo", "MemInfoDetail", "Name", "Password", "PostToHTTP", "Publish",
   "Reboot", "Reset", "Save", "SendTo", "SendToHTTP", "SendToUDP", "Settings", "Subnet", "Subscribe", "TaskClear", "TaskClearAll",
-  "TaskDisable", "TaskEnable", "TaskRun", "TaskValueSet", "TaskValueSetAndRun", "TimerPause", "TimerResume", "TimerSet", "TimerSet_ms", "TimeZone",
+  "TaskDisable", "TaskEnable", "TaskRun", "TaskValueSet", "TaskValueSetAndRun", "ThingspeakReply", "TimerPause", "TimerResume", "TimerSet", "TimerSet_ms", "TimeZone",
   "UdpPort", "UdpTest", "Unit", "UseNTP", "WdConfig", "WdRead", "WiFi", "WiFiAPkey", "WiFiAllowAP", "WiFiAPMode", "WiFiConnect", "WiFiDisconnect", "WiFiKey",
   "WiFiKey2", "WiFiScan", "WiFiSSID", "WiFiSSID2", "WiFiSTAMode", "WiFi#Disconnected",
   "Event", "AsyncEvent",