sum check is also called accumulation and check. And checksum calculate the cumulative sum for each byte. XOR check defines the initial value, and XOR each byte to find the result. XOR check is also called XOR sum check or BCC check. BCCcheck is a commonly used serial port data verification. The concept of checksum is generally embodied in an 8-8bit character array. Note that the XOR check is an XOR operation, and it is necessary to forcibly convert characters into shaped data first.

check, a mathematical term, is a way to correct data errors in data transmission, which can be divided into odd check and even check. Analyzing the usage of calibration at home and abroad, the meaning is basically the same, and it is related to verification and calibration, but there are obvious differences. It does not have the same legality as calibration, but it has the same technical operation content as verification. Generally, it can be calibrated, and other related performances can be tested as required, and finally the qualified conclusion is given. This term is sometimes necessary, and it is suggested that a formal position should be given to check in the definition of relevant terms to unify and standardize its use.