We are trying to use AT+QFCRC command to check if an existing file matches with stored version. We have done some tests in order to identify the algorithm used for crc32 with no success. The test is very straightforward:
- Upload 1 byte (or a few bytes, it doesn’t matter)
- Get crc with AT+QFCRC command
- Calculate crc32 (there are a lot of online resources for this)
For this test i’ve used 1 byte (“0” ascii char)
CRC command result:
What is the algorithm used here for 32bits?
This are the results of others algorithms i’ve found: