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Error message when trying to upload to Arduino

marktaylor

So I am currently working with an arduino nano and I just built a prototype PCB for the system I was working with on a breadboard previously. After checking the PCB connection many times I finally tested it with my nano. Everything seems to be working as expected. However, now that I am further developing the sketch I want to run I cannot upload and am getting the error shown below. This error only occurs when seated in the headers on my PCB. If I take the nano off the board then everything is fine and I can upload my sketch. What are some potential issues with my PCB that could be causing this? Is it possible to answer this without seeing the board? Is it safe to keep using the PCB as is and just unseat the nano every time I want to update the sketch?


								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


			





	










	

	

					



			


				
	









	
    
	

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    I can't see your error message for some reason, but I like a good challenge.  :-)
     
    If you are confident on your solder joints and the design, you had no shorts when you tested the un-populated board, it uploads with the board not installed, and the assembled project works within your expected amp range - you are good. If you don't know your amp draw, you should get one of these.
     
    I suspect you can't upload because your circuit is interfering with the serial pins or reset pin.  The original bootloader for the Nano (discussed here) gave an issue for analog pins as well.  So, you may want to check to see if you need to flash the bootloader
     
    I had trouble like this in my past with the ESP8266.  In turn, I put a tiny switch on my PCB that allowed me to switch it to "program" mode.  It was simply in line with the offending pin.
     
    To find the offending pin, I'd use jumper wire to land my headers.  Remove one at a time until you find the sucker.  Do a little dance when you do.
     
    See ya',
    Sean
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
						
				
				
		
		
    
			
		
    
	
    

    

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    Well..
    Your error message cannot be seen but lets try to figure this out anyway.. image
     
    My broad guess is that you occupied the Rx Tx pins on your designed PCB for some different use. If you are sharing those pins with some other devices connected to your PCB like ESP8266 or GSM module or any such using Rx Tx pins during uploading of sketch then you may find trouble while uploading it. I think that is why your sketch gets uploaded when not connected to your PCB. I hope reallocating them will solve your issue.

    Good luck!
    Hrishikesh Mehta

    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
						
				
				
		
		
    
			
		
    
	
    

    

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    Your error message would be useful!
     
    As   and    have both said, interference with Rx/Tx pins is a common reason for upload failures in Arduino IDE
     
    Neil
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
				
						
				
				
		
		
    
			
		
    
	
    

    

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