checksum CRC-16 (Modbus)
Clash Royale CLAN TAG #URR8PPP checksum CRC-16 (Modbus) I have to checksum this hex, but i test it and the system dont respond. The docs said "SUM is the sum check of all bytes from the frame header" Frame headers AA 75 "SUM is the sum check of all bytes from the frame header" AA 75 The hex i have is AA 75 56 56 56 56 F6 00 00 SUM I use https://www.lammertbies.nl/comm/info/crc-calculation.html And in CRC-16 (Modbus) The result is 0x8598 AA 75 56 56 56 56 F6 00 00 SUM CRC-16 (Modbus) 0x8598 But when i use this in my system it dont work. This is the right way to create a checksum? Try following webpage. Make sure your code is using the correct Polynominal, Initial value, and reflected setting. Last time I had issue I found the reflected was wrong and had to to a 1's compliment. sunshine2k.de/coding/javascript/crc/crc_js.html – jdweng 19 mins ago ...