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+--- Thread: send hexadecimal package variable UART (/thread-30655.html)
send hexadecimal package variable UART - santos20 - Oct-30-2020
Hello , guys
i am new using python i would like to send a package of hexadecimal values using the uart the problem it is two of the values are variables i have done a lot of research and i cant find anything it will be really helpful here is my code basically i am trying to send this
Output:x = b'\x41\x0A\x01\variable\variable'contition=True
while contition:
main_input = int(input("select a number: "))
if main_input == 13:
contition == False
break
elif main_input == 1:
light_val = int(input("insert the new threshold value: "))
a = (1, 10, light_val)
csum = sum(a)
csum = hex( csum^ 0xFF)
print(csum)
b = hex(light_val)
c = hex(10)
d = hex(1)
e = hex(65)
y = (e, c, d, b, csum)
x = b'\x41\x0A\x01\x05\EF'
#ser.write(x)
#ser.write(Y)
print(Y)
else:
print(" Not Valid choice")thanks a lot
RE: send hexadecimal package variable UART - bowlofred - Oct-30-2020
Are you trying to send string (ascii) representations or are you trying to send byte values?
To send a ten, do you want to send a numeric 10, or an ascii "1" followed by an ascii "0"?
The "output" you show above is a bytes object (so numeric), while you have hex() calls all over your code which is creating strings.
RE: send hexadecimal package variable UART - Larz60+ - Oct-30-2020
bolofred is correct.
for unsigned bytes:
hexadecimal is the base 16 representation of byte (8 bits) data
decimal is base 10
octal base 8
binary base 2
char is value assigned to first 127 bits of a byte, or all 256 bits if extended ascii is used.
html is decimal value, zero padded, preceeded with &#
Example:
Output:the ascii string 'cow'
=============================================
| chr | hex | dec | oct | html | binary |
=============================================
| c | 63 | 99 | 143 | c | 0110 0011 |
---------------------------------------------
| o | 6f | 111 | 157 | o | 0110 1111 |
---------------------------------------------
| w | 77 | 119 | 167 | M | 0111 0111 |
=============================================