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How to get the pixy.block[i].signature?

Hello! I want to check the signature of each color block with pixy.block[i].signature, then do stuff for the blocks. I have seen the previous answer, but when I use the code, it will have error. I think the question may be caused by the version. Could you help me solve the problem?%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20180830213754

Hello,
What error did you get?

%E5%BE%AE%E4%BF%A1%E6%88%AA%E5%9B%BE_20180831082902

You need to use m_signature. Please check out this page:

https://docs.pixycam.com/wiki/doku.php?id=wiki:v2:ccc_api&s[]=m_signature