I am reading a manual on sending commands via serial to a device as shown: 
Assume that my equipment address is 000. I would send a command like: ">000P**cr".
what would **, my checksum be? According to the manual, I need the last two digits of the total char code of "000P".
Isn't that just the hex value of "P"? I can't seem to understand this.
1 Answer
Yes it's a bit confused, but my guess would be:
total = ascii('0') + ascii('0') + ascii('0') + ascii('P') total = 48 + 48 + 48 + 80 total = 224 cksum = last2digits(total) = 24 If it does not work as is, maybe try in hexadecimal notation:
hex(total) = E0 hex_cksum = last2digits(hex(total)) = E0 
