function checkBlock(blockNo, keys, keyType)
-- The command data is only 512 bytes, each key is 6 bytes, meaning that we can send max 85 keys in one go.
-- If there's more, we need to split it up
function checkBlock(blockNo, keys, keyType)
-- The command data is only 512 bytes, each key is 6 bytes, meaning that we can send max 85 keys in one go.
-- If there's more, we need to split it up