Check to see if printer is valid before allowing connection.

src/apiController.py

@@ -48,7 +48,7 @@ def setPort():
             return jsonify({'status': 'success'}), 202
         except Exception as e:
             print(e)
-            return abort(500, 'Failed to connect to port. Please check if you printer is connected')
+            return abort(500, 'Failed to connect to port. Please check if your printer is connected')
     else:
         return abort(400, 'Please provide a port')
 

src/frontend/js/info.js

@@ -85,6 +85,7 @@ function reconnect(){
     } else {
       document.body.style.cursor = "default";
       document.getElementById('again').disabled = false;
+      document.getElementById('refresh').disabled = false;
     }
   }
 )

src/printerSerial.py

@@ -26,9 +26,28 @@ def __init__(self, port, baudrate, logname='PRINTER'):
         self.ser = serial.Serial(port)
         self.ser.baudrate = baudrate
         self.ser.timeout = 5
+        self.ser.write_timeout = 5
         time.sleep(0.5)
         self.readFromSerial()
 
+        try:
+            self.ser.write(b'M115 \n')
+            fullOut = ""
+            for i in range(30):
+                out = self.ser.readline()
+                fullOut += str(out)
+                self.logger.info (out)
+                if out == b'ok\n':
+                    self.logger.info (f'Printer responded to M115')
+                    break
+        except Exception as e:
+            self.logger.error (f'Printer failed to respond to M115')
+            raise Exception ('Not a printer')
+
+        if len(fullOut) < 0:
+           self.logger.error (f'Printer failed to respond to M115')
+           raise Exception ('Not a printer')
+
     def readFromSerial(self, forever=False):
         while True:
             output = self.ser.read_until('\n', 1000)