MicroPython Forum (Archive)

>>> bis='11110' >>> struct.pack('<H', sum(int(bis)*(1<<(i^7)) for i, b in enumerate(bis))) b'\xd0\n' Don't do that. You are just confusing yourself. Do not mash a bunch of code into one line. It might look cool, but it is hard to understand and debug. You can do that if you want after fully validat...

But when I send this character the lora the receiver reports 3 bytes. Am I right in thinking that those 3 bytes were probably \u f7 fa ? What's bugging me is I can't get anything other than the lora receiver to report 3 bytes for r. I figure if I really had a handle on the different classes and the...

Something is troubling me Rob. It should take 2 bytes to represent 16 bits. But if I convert my 16 bit string of 1s & 0s to a character with d=int(bis, 2); bys=hex(d); r=chr(int(bys)) & send that over raw lora (without encryption) the receiver says it's received 1 byte. How is it possible to cram 6...

def _Tx(r): s.send(M); m=lora.stats(); print('P(dBm)',m[6], ' sf',m.sftx, ' Tx(ms)',m[7]); print() bis='1111011111111010' d=int(bis, 2); h=hex(d); r=chr(int(h)); print('bys', r, type(r), len(r), 'bytes'); _Tx(r) d=int(bis, 2); h=hex(d); r=(h)[2:7]; print('bys', r, type(r), len(r), 'bytes'); _Tx(r) ...

davef wrote: ↑

Thu Jul 07, 2022 3:34 am

Seen this?
viewtopic.php?f=18&t=9768&p=54711&hilit ... 8mb#p54711
Maybe, it gives a clue to the process.

That looks useful. Thanks.

jimmo wrote: ↑

Thu Jul 07, 2022 2:52 am

Fairly sure no recompile necessary if you don't plan to use anything past the first 2MiB.

You'd need to recompile to set a new filesystem size limit if you did want to grow the filesystem.

Yeah, not for this application. I guess I'll find out in a few days. I'll report back with my findings.

RP2040. We have a bunch of custom boards arriving next week. I think I remember reading somewhere that you have to recompile MicroPython if you change from the stock 2 MB flash chip. I put a 16 MB chip (W25Q128JVS) on these boards. Don't need the storage for MicroPython at all, 2MB is fine. This is ...

After reading the learned comments I thought I had a handle on bytes & the different ways python displays them. But I still managed to fall at the first hurdle. When talking to the outside world, the only data types you want to use are bytes and bytearrays. I know it sounds simple. Once you make th...

See https://github.com/micropython/micropython/issues/8861 and https://github.com/micropython/micropython/issues/8862 Thanks for opening these issues. While nobody like losing pins, this might be necessary. There might be a potential to get clever with existing pins. GPIO 23 and 24 come to mind.

scruss wrote: ↑

Tue Jul 05, 2022 3:00 am

Looks like a bug, perhaps.

Rather than using the full-on flash_nuke.uf2, there's one which renames main.py here: Bricked MicroPython rescue firmware - Raspberry Pi Forums. At least that way you can recover the contents of the board

That can be very useful too. Thanks for posting the info.