Error: UPDATE devices SET temp_min= ', temp_max ='', adjust_temp='' ,
        hum_min='', hum_max ='', adjust_hum ='',
        dev_ip ='', decv_gatway ='', dev_subnet ='',
        max_probe='' , doors ='' , createby=''  
        WHERE dev_sn=''<br>You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '', temp_max ='', adjust_temp='' ,
        hum_min='', hum_max ='', adjust_hum ='' at line 1