Results 2 issues of JC

After running `yarn add frappejs` **I got this error:** make: *** [bcrypt_lib.target.mk:113: Release/obj.target/bcrypt_lib/src/bcrypt_node.o] Error 1 make: Leaving directory '/home/jc/Desktop/frappejs/node_modules/bcrypt/build' gyp ERR! build error gyp ERR! stack Error: `make` failed with...

Can i use this to detect if the cash drawer is closed or open?