MicroPython Forum (Archive)

Copying to a buffer can be done more efficiently using a memoryview: mv = memoryview(radioBuffer) def copyStringToRadioBuffer(s): l = len(s) mv[: l] = s.encode('utf8')[: l] mv[l] = 0 Whoops! Your code produced an error message: Hello. I am the transmitter node. My address is 0xAAFEEDBEEF The target...

Great work! Getting the proprietary radio working must have taken a lot of effort. I now feel very tempted to get a couple of those modules. If I may be permitted a few comments there are ways to make the code more efficient. Each constant uses 8 bytes of RAM: this is because they can be imported f...

I posted working OTA micropython code on github: https://github.com/rabbithat/NRF52840_MicroPython_OTA_Updates for both the transmitter node and the receiver node (i.e. the node whose code is to be updated over the air). In short, you copy the updated receiver code to a file called "update.txt" on t...

As an example, on an nRF52840 by default there's enough space in the micro file system to store two ~12K micropython (.py) files, but apparently not enough space for three or more. Yet, the nRF52840 comes standard with 512K of flash memory, so there should be plenty more space that can be allocated ...

Thanks for the suggestions. There are doubtless many ways to make this better and more bomb proof and faster, but as a very simplified first attempt what I did was transmit each payload 3 times in a row. Each payload contains an identifier, so any received packets that are redundant are just discard...

Hmm. If you connect via the regular REPL, what does the output of: ``` >>> import sys >>> sys.stdin.buffer ``` show? MicroPython v1.9.4-651-g0f6f86ca4-dirty on 2018-10-27; PCA10056 with NRF52840 Type "help()" for more information. >>> import sys >>> sys.stdin.buffer Traceback (most recent call last...

You seem to be missing the options to specify the serial port to connect to. rshell only connects automatically to USB Serial ports which have a vendor name of "MicroPython", otherwise you need to specify the serial port using the --port command line option. You mean like this? root@debian:/home/da...

@WhiteHare It would be useful to get a logfile of the output of running rshell with the -d command line option, in addition to whatever other command line options you're using. One of the commands rshell issues when first connecting to a board is the os.listdir command. Behold: root@debian:/home/da...

I'd really like to have a way to copy a file from the target so that I can run a diff against the file that I transmitted OTA there. Right now the closest I can do is print a file to the UART.

I'm not familiar with their proprietary radio, but their NRF24l01+ performs checksumming and automatic retransmission. So you can be confident that any packet you receive will be correct. Where a message comprises multiple packets you need to check that every packet has been received before attempt...