uBlox UBX checksum calculator

ubx_checksum.py

# CFG-RATE (0x06,0x08) packet (without header 0xB5,0x62)
# payload length - 6 (little endian format), update rate 200ms, cycles - 1, reference - UTC (0)
packet = [0x06,0x08, 0x06,0x00, 0x00,0xC8, 0x00,0x01, 0x00,0x00]

CK_A,CK_B = 0, 0
for i in range(len(packet)):
  CK_A = CK_A + packet[i]
  CK_B = CK_B + CK_A

# ensure unsigned byte range
CK_A = CK_A & 0xFF
CK_B = CK_B & 0xFF

print "UBX packet checksum:", ("0x%02X,0x%02X" % (CK_A,CK_B))

#UBX packet checksum

hi that's code works:
I will give you my tested sample
(rust lang..)
fn main() {
let data =[ 0xB5,0x62,0x01, 0x07,0x54,0x00, 0xBC,0xB5,0x4B, 0x0B,0xE2,0x07, 0x06,0x05,0x04, 0x26,0x0D,0x07, 0x04,0x00,0x00, 0x00,0x8A,0xCA, 0xF7,0x05,0x03, 0x01,0x0A,0x0C, 0x97,0x4A,0x5A, 0x57,0xA0,0xD3, 0x3B,0xE9,0xF8, 0xD5,0x00,0x00, 0xC6,0xD8,0x00, 0x00,0x59,0x05, 0x00,0x00,0x1E, 0x07,0x00,0x00, 0x09,0x00,0x00, 0x00,0xDB,0xFF, 0xFF,0xFF,0xF5, 0xFF,0xFF,0xFF, 0x26,0x00,0x00, 0x00,0x70,0x85, 0x1B,0x01,0xF5, 0x00,0x00,0x00, 0x4A,0x28,0x50, 0x00,0x90,0x00, 0x00,0x00,0x84, 0xD3,0x11,0x00, 0x93,0x4F];

let mut CK_A = 0;
let mut CK_B = 0;
let len =data.len();

for i in 0..len {
if i == 0 || i == 1 || i == len-2 || i ==len-1{continue;}
CK_A = CK_A + data[i];
CK_B = CK_B + CK_A;
}
CK_A = CK_A & 0xFF;
CK_B = CK_B & 0xFF;

println!("{:#x}",CK_A);
println!("{:#x}",CK_B);
}

//AmirMahdi Hassanzadeh