Implemented start and stop command jsphuebner/libopeninv#25

Author: jsphuebner

esp32-web-interface.ino

@@ -517,6 +517,29 @@ static void handleCommand() {
       server.send(200, "text/plain", "No reply to save command");
     }
   }
+  else if (cmd == "stop") {
+    if (OICan::StartStop(0)) {
+      server.send(200, "text/plain", "Inverter halted");
+    }
+    else {
+      server.send(200, "text/plain", "Stop command failed");
+    }
+  }
+  else if (cmd.startsWith("start")) {
+    String str(cmd);
+    int modeStart = str.indexOf(' ');
+    int opmode = str.substring(modeStart, str.indexOf('\r')).toInt();
+
+    if (OICan::StartStop(opmode)) {
+      server.send(200, "text/plain", "Inverter started");
+    }
+    else {
+      server.send(200, "text/plain", "Start command failed");
+    }
+  }
+  else {
+    server.send(200, "text/plain", "Unknown command");
+  }
 
   digitalWrite(LED_BUILTIN, LOW);
 }

src/oi_can.cpp

@@ -54,7 +54,9 @@
 #define SDO_CMD_SAVE          0
 #define SDO_CMD_LOAD          1
 #define SDO_CMD_RESET         2
-
+#define SDO_CMD_DEFAULTS      3
+#define SDO_CMD_START         4
+#define SDO_CMD_STOP          5
 
 namespace OICan {
 
@@ -577,7 +579,24 @@ bool SaveToFlash() {
 
   setValueSdo(SDO_INDEX_COMMANDS, SDO_CMD_SAVE, 0U);
 
-  if (twai_receive(&rxframe, pdMS_TO_TICKS(200)) == ESP_OK) {
+  if (twai_receive(&rxframe, pdMS_TO_TICKS(200)) == ESP_OK && rxframe.data[0] == SDO_WRITE_REPLY) {
+    return true;
+  }
+  else {
+    return false;
+  }
+}
+
+bool StartStop(int opmode)
+{
+  if (state != IDLE) return false;
+
+  twai_message_t rxframe;
+  uint8_t subIdx = opmode == 0 ? SDO_CMD_STOP : SDO_CMD_START;
+
+  setValueSdo(SDO_INDEX_COMMANDS, subIdx, opmode);
+
+  if (twai_receive(&rxframe, pdMS_TO_TICKS(200)) == ESP_OK && rxframe.data[0] == SDO_WRITE_REPLY) {
     return true;
   }
   else {

src/oi_can.h

@@ -33,6 +33,7 @@ SetResult AddCanMapping(String json);
 SetResult RemoveCanMapping(String json);
 SetResult SetValue(String name, double value);
 double GetValue(String name);
+bool StartStop(int opmode);
 bool SaveToFlash();
 String StreamValues(String names, int samples);
 int StartUpdate(String fileName);