Posts made by Jeffrey Lavoie

This was with me actually installing pysnmp on the omega with "pip install pysnmp", so it was trying to compile it on the omega and I'm guessing even if I did "pip install pycrpytodomex" it would have had the same results.

installing gcc, after uncommenting the base and packages lines for openwrt in /etc/opkg/distfeeds.conf, seemed to do the trick. Though, I ran into another problem. It ran out of free space, not on my sd card, but on the /tmp mount. I'm not sure how to increase that, or if I really need to, but for anybody else that might come across this the solution was to specify a build folder for pip like this.

pip install --build /root/tmp pysnmp

Ok, so if I just install gcc it should be fine? I was thinking it was some kind of special version of gcc because of the long command name it gave and I couldn't find any references online to that command. I'll give that a try.

Hi everyone, I'm trying to install the pthon module pysnmp as I am attempting to set up a snmp responder so that my device can be controlled with snmp. The first problem I ran into was lack of memory, so I solved that with making a 2GB swap partition on my sd card. Now I'm running into the following and not sure how to fix it. I've tried searching google and here and I can't seem to find anything relevant.

───────────────────────────────────────────────
unable to execute 'mipsel-openwrt-linux-musl-gcc': No such file or directory
error: command 'mipsel-openwrt-linux-musl-gcc' failed with exit status 1

ERROR: Failed building wheel for pycryptodomex
───────────────────────────────────────────────

A note for anyone else that may stumble upon this topic looking for information about python and i2c.

The link above for SMBus has some examples, here is one of them.

──────────────────────────────────────────
from smbus2 import SMBusWrapper

with SMBusWrapper(1) as bus:
# Write a byte to address 80, offset 0
data = 45
bus.write_byte_data(80, 0, data)
──────────────────────────────────────────

In this example two things need to be changed to make it work. Well, three really.

1. Change SMBusWrapper(1) to SMBusWrapper(0) as the i2c bus on the omega 2 is 0 and not 1.
2. Change the address (80 in the example) to the address of the chip you are using.
3. Add 0x to the beginning of your address so that it is something like 0x80.

Without these changes smbus2 will not work on the omega 2. It took me a bit to figure this out and I hope it helps others.