My USB-RFID reader receives a 10 bit ID from the card. I want to assign a unique name and surname to each 10-bit number.
My goal is to have the name appear on the screen when the person using the card reads the card. Is there any way I can do this?
Related
In Google Sheets I have a column containing a list of available Serial Numbers (say, column A).
Somewhere else (say, column B) a user must choose the serial number used among those listed in column A; I use Data Validation with a drop-down list in order to prevent the user to use a non-existent serial number.
My goal is to allow the user only choose the remaining available serial numbers, by removing from the drop-down list all the serial numbers already used.
By using the FILTER function, combined with MATCH and ISNA, I am able to create a column of available serial numbers (say, column C). The function used is:
=FILTER(A2:A;ISNA(MATCH(A2:A;B2:B;0))).
Then I moved the Data Validation list of column B (where the user must select the serial number used) from column A (all serial numbers) to column C (filtered serial numbers). I also added the "Reject input" in the Data Validation form, so I can allow the user only to enter a value listed in column C.
It works, but all the previously entered serial numbers on column B have a small red triangle showing that data is not valid. Of course, this happens because all entered values are removed from the data validation list.
I could simply ignore the red triangles, but I don't like this solution that much, because it always looks like there's an error on the sheet, and when we will have many data inside it would be difficult to distinguish this problem from any others.
Is there a different way to solve?
Thanks
with formula only you can use:
=TRANSPOSE(FILTER(A2:A, NOT(COUNTIF(C3:C4, A2:A)), A2:A<>""))
=TRANSPOSE(FILTER(A2:A, NOT(COUNTIF({C2; C4}, A2:A)), A2:A<>""))
=TRANSPOSE(FILTER(A2:A, NOT(COUNTIF(C2:C3, A2:A)), A2:A<>""))
then hide columns and use validation:
where this is the result:
demo sheet
update:
1st fx:
=TRANSPOSE(FILTER(A2:A, NOT(COUNTIF(C3:C4, A2:A)), A2:A<>""))
2nd and every next fx:
=TRANSPOSE(FILTER(A$2:A, NOT(COUNTIF({
INDIRECT("C2:C"&ROW()-1); INDIRECT("C"&ROW()+1&":C")}, A$2:A)), A$2:A<>""))
I'm using weka for image classification, and in my CSV file, there are two columns one is class which is a numeric type and the other one is the ID. however, my id consists of numbers and alphabets. what I have to do now is to change the type of ID, but to what?
I am trying to allow the user to search on any of 4 criteria and have the rest of the 3 remaining field data validate based on the first search for selection.
I have four fields that I am trying to make dependent drop downs for the remaining 3 based on what you search for 1st. For example:
Scenario 1 - I search the data range validation for NAME and select a name in Cell L2.
I want the Phone, Email and Address to become dependent on the name was chosen (as there may be multiple records with the name of the person chosen).
I have accomplished this by using a secondary filter formula to filter address based on the name chosen and then applied data validation from the filter.
My problem is that I can't seem to figure out how to do the same thing if they pick the address first. Because my data validation is set on the filtered values and not the entire database. If they picked the address first, I want to validate based on ALL addresses and then filter-validate the NAME, PHONE and EMAIL.
I really just want them to be able to search whatever of the 4 criteria and then validate the other 3 on that result.
Any thoughts would help.
You can see my formula for filtering Addresses based on the Name selection in Cell S2 of the Customer Record Tab.
=if(L6="Address",filter('Sample Data'!$C:$C,'Sample Data'!$E:$E=L6),IF(L6="Phone",filter('Sample Data'!$C:$C,'Sample Data'!$D:$D=L3),IF(L6="Email",filter('Sample Data'!$C:$C,'Sample Data'!$J:$J=L4),L2)))
https://docs.google.com/spreadsheets/d/1E7adi88aEgvdV4ao8unbMHgZLEyu5CCRdTOjv8thjtc/edit#gid=1427488050
Select Name and only the Phones, Emails and Addresses for that selected name can be selected.
Select the Address and only the Names, Phones and Emails for that Address can be selected.
Same for Phone and for Email
I want to query different flags of a specific volume. Input should be the volume id, for instance:
\\?\Volume{b1a245f3-0000-0000-0000-100000000000}\,
then some flags are checked and the output is true/false depending if the desired flags are set.
The question is: How can I retrieve the Physical Device Object for a specific volume id? Exists there a method which takes the volume id as input or do I have to enumerate over all device objects?
I am trying to build a client to get values from an snmp enabled device using snmp4j. Using the OID and index number i can fetch the name and serial number of the device. But i heard that index number is not constant and it keeps changing.
Thou i may find the required index number (for example, of a network interface) among the SNMP OIDs, sometimes we may not completely rely on the index number always staying the same.
Index numbers may be dynamic - they may change over time and your item may stop working as a consequence.
SO i need to find a way as to how to fetch the index number dynamically. Or is there any way that i can get the serial number without hard coding the serial number.
One OID might have 150 index numbers each having an different value. i need to get a particular info from that table.
It's (unfortunately) not unusual that index numbers change. For example, some equipment will re-order some tables on reboot.
You probably already realized that if the index values are volatile, you won't be able to fetch the data in one request. But you could do it by "walking" the table.
Using the GetNextRequest, you can start at the column headers, and then proceed through the table, fetching all the data or just individual columns. For a more detailed example, see section 4.2.2.1 of RFC 1905:
https://www.rfc-editor.org/rfc/rfc1905
Assuming that there is some column in the table which will identify the correct card, you could either:
Walk only the identifying column, and from the values find the index of the card you want, then issue a single GetRequest for the serial number of that card
(More efficient) Walk both columns (identifier and serial number) by requesting those two column headers in the first request, etc. In the resulting data set, find the data for you card.