added returning to regular hid mode via reboot

arduino/arduino_nRF52840/arduino_nRF52840.ino

@@ -76,6 +76,7 @@ volatile uint8_t switchBleConnCurrIndex = 0;
 using namespace Adafruit_LittleFS_Namespace;
 #define FILENAME "/devNameList.txt"
 #define MODE_FILENAME "/config.txt"
+#define TMP_FILENAME "/tmp.txt"
 
 File file(InternalFS);
 
@@ -272,6 +273,63 @@ void change_mode(char* myLine) {
   NVIC_SystemReset();  
 }
 
+void save_tmp_file() {
+  file.open(TMP_FILENAME, FILE_O_WRITE);
+  if(file) {
+    file.seek(0);
+    file.write((const uint8_t *)&flag_bleSwapConnProsStarted, 1);
+    file.write((const uint8_t *)&switchBleConnStartIndex, 1);
+    file.write((const uint8_t *)&switchBleConnCurrIndex, 1);
+    file.close();
+
+    #ifdef DEBUG
+      Serial.println("Temp parameters saved");
+      Serial.print("Previous connection index");
+      Serial.println(switchBleConnStartIndex);
+      Serial.print("Previous connection name");
+      Serial.println( bleDeviceNameList[switchBleConnStartIndex - 1]);
+      Serial.print("Target connection index");
+      Serial.println(switchBleConnCurrIndex);
+      Serial.print("Target connection name");
+      Serial.println( bleDeviceNameList[switchBleConnCurrIndex - 1]); 
+    #endif
+  } else {
+    #ifdef DEBUG
+    Serial.print(MODE_FILENAME " Write Failed");
+    #endif
+  }
+}
+
+void load_tmp_file() {
+  file.open(TMP_FILENAME, FILE_O_READ);
+  // file existed
+  if (file)
+  {
+    file.read((void *)&flag_bleSwapConnProsStarted, 1);
+    file.read((void *)&switchBleConnStartIndex, 1);  
+    file.read((void *)&switchBleConnCurrIndex, 1);  
+    file.close();
+
+    #ifdef DEBUG
+      Serial.println("Temp parameters loaded");
+      Serial.print("Previous connection index");
+      Serial.println(switchBleConnStartIndex);
+      Serial.print("Previous connection name");
+      Serial.println( bleDeviceNameList[switchBleConnStartIndex - 1]);
+      Serial.print("Target connection index");
+      Serial.println(switchBleConnCurrIndex);
+      Serial.print("Target connection name");
+      Serial.println( bleDeviceNameList[switchBleConnCurrIndex - 1]); 
+    #endif
+
+    InternalFS.remove(TMP_FILENAME);
+  } else {
+    #ifdef DEBUG
+    Serial.println(TMP_FILENAME " Read Failed");
+    #endif
+  }
+}
+
 void setup()
 {
   Serial.begin(115200);
@@ -284,6 +342,8 @@ void setup()
   InternalFS.begin();
 
   load_mode_file();
+
+  load_tmp_file();
 
   pinMode(USER_SW, INPUT_PULLUP);
 
@@ -835,11 +895,7 @@ void switchBleConnection(char *myLine)
           at_response("ERROR: No other device present in list\n");
           break;
         }
-        else
-        {
-          connection->disconnect();
-        }
-
+
         if (switchBleConnStartIndex >= bleDeviceNameListIndex)
         {
           switchBleConnCurrIndex = 1;
@@ -854,6 +910,9 @@ void switchBleConnection(char *myLine)
 
         snprintf(buff, sizeof(buff), "Trying to connect with -  %s\n", bleDeviceNameList[switchBleConnCurrIndex - 1]);
         at_response(buff);
+
+        connection->disconnect();
+
         break;
       }
     }
@@ -1227,6 +1286,17 @@ void disconnect_callback(uint16_t conn_handle, uint8_t reason)
   //Serial.println();
   //Serial.print("Disconnected, reason = 0x"); Serial.println(reason, HEX);
 
+  if(blehid.isBootMode()) {
+    save_tmp_file();
+
+    #ifdef DEBUG
+    Serial.println("Resetting hid mode");
+    delay(1000);
+    #endif
+
+    NVIC_SystemReset(); 
+  }
+
   connection_count--;
   // Keep advertising if not reaching max
   if (connection_count < max_prph_connection)
@@ -1254,4 +1324,4 @@ void set_keyboard_led(uint16_t conn_handle, uint8_t led_bitmap)
   {
     ledOff(LED_RED);
   }
-}
+}

arduino/receiver_dongle/receiver_dongle.ino

@@ -142,7 +142,7 @@ void scan_callback(ble_gap_evt_adv_report_t* report)
       Bluefruit.Central.connect(report);
     }
   } else {
-    Serial.println("Name not available");  
+    Serial.println("Name not available");
   }
   Serial.println();