MicroPython Forum (Archive)

Hello, I've in the main progamm a pin initialized as output and it works. Then I did make subroutines and put this in another files for a better overview. The file I integrated wirth import. The Call of the subroutines takes place after the pin initialization. But MicroPython shows me an error than ...

Thank you very mutch!
If you are in Thuringia the next time, I owe you:

Hello, I want open a file. This file is r.a.120kB. Because I have a ESP with 8/4MB SPI-RAM. I open the file, read it with readlines(), determinate the numbers of lines and show that in the shell. SC1 All in butter. Maby a half minutes later the completly content of the variabe lines/file appears in ...

Roberthh wrote: ↑

Tue Nov 03, 2020 9:11 am

You tried hexlify instead of unhexlify.

OK, this works too.
I can't read. Sorry!

I wrote a function. This works. def str2byte16(strdata): from struct import pack num8 = str2byte8(strdata[0]) num16 = str2byte8(strdata[1]) data16 = (num16 * 16) + num8 bytedata16 = pack('B',data16) return bytedata16 def str2byte8(strdata): numchar = ord(strdata[0]) if numchar > 47 and numchar < 58:...

Thanks!

But that's not it.

This makes the ASCII-Code of the letters. From 'EE' => 4545
I need b'\xee'.

uart.write(b'\xAA') >>> 0x41 0x41 That was wrong from me. I recieve the dates from the UART in a PIC. There I forgot that I need a b'\x01' before the actual data. If I send uart.write(b'\x01\xAA) then I recieved 0xAA in the PIC. That's all good and chic. But it's not the solution of my problem. I h...

Thanks!
The conversion from str to hex is clear. It works with de-/encode() also.

But the UART.write() sends ASCII only.

uart.write(b'\xAA')
>>> 0x41
0x41

If I want send 238 as an integer, the µPython brings error. The question ist, can the UART class works with strings only?

Thanks for the help! I've no objection to Robert's FTP solution. But, who should be used my control unit with the software that I've to make, somtimes has no idee about computer. The ESP-Unit should is supposed a connection beetwen a controlller unit an a smartphone/tablet/PC. For this is the first ...

Hello,


how can I send hexadecimal numbers via UART?
If I try 'hex(0xEE)' then I get an error from µPython. '238' also. 'bytes([283])' or 'bytes([0xEE)' sends a 0x00.

I use the UART lib from µPython.