[Tutor] Convert string to bytes

Alan Gauld alan.gauld at btinternet.com
Wed Dec 31 18:57:33 CET 2014

On 31/12/14 10:08, shweta kaushik wrote:

> I have one message packet in form of string s = '0xFE, 0x01, 0x01, 0x22,
> 0xFE, 0x02'. I have to send this data to MSP430 microcontroller, but it is
> not taking data if it is string. If I am passing this as hardcoded value s1
> = 0xFE, 0x01, 0x01, 0x22, 0xFE, 0x02 then board is responding. I want to
> convert s as s1 using python.

I'm pretty sure you don;t need that, you only need the integer values of 
the hex strings. You can then write those integers directly to your 
controller. Assuming I'm right this should work (Python v2.7):

 >>> s = '0xFE, 0x01, 0x01, 0x22, 0xFE, 0x02'
 >>> [int(h,16) for h in s.split(',')]
[254, 1, 1, 34, 254, 2]

Alan G
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