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Failed to overwrite the device attributes value

		
	
				

			

									
					    YongLawrence
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 8, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user encountered an issue where the AD-PQMON-SL device was not correctly displaying the Epoch time when using iio_device_attr_write_double() on a Linux system (Banana Pi BPI-M4). The problem was resolved by removing the coding in iio_pqm.c that was incorrectly handling the `CURRENT_TIMESTAMP` attribute. The correct implementation now allows the AD-PQMON-SL to sync with the Epoch time accurately.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  AD-PQMON-SL 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hardware: AD-PQMON-SL
    

     
    

    OS: Linux (Installed on Banana Pi BPI-M4)
    

     
    

    Goal:
    

      

    1. Read Epoch time from Linux OS
      2. 

    2. Send the Epoch time to AD-PQMON-SL by using iio_device_attr_write_double()
      3. 

    3. AD-PQMON-SL sync time with Epoch time by using adi_pqlib_SetTime()
      4. 

    

     
    

    Expected Result from iio_info:
    

    attr 34: current_time value: 1759932365.00
    

     
    

    Error Result from iio_info:
    

    attr 34: current_time value: 0.00
    

     
    

    Troubleshooting step has been taken:
    

    For existing attributes like <process_data>, successfully use iio_device_attr_write_double() to change to 0, to enable waveform buffer.
    

     
    

    Coding and connection:
    

     
    
			
    
			
									    
    
			        
    Edit Notes
    
    				Update API adi_pqlib_SetTime()
    
[edited by: YongLawrence at 12:41 AM (GMT -4) on 9 Oct 2025]
				
    
						
		                             
                        

    
    
                                            
                 hardware
                
                                                    
                 AD-PQMON-SL