A place to talk about anything and everything Omega related
3831
Topics
20864
Posts
Wanted to chime in here: the latest version of the bootloader fixes the USB flashing method!
All of the relevant info can be found here: https://community.onion.io/topic/4132/bootloader-update-fix-for-flashing-firmware-from-usb-storage
Just note that you'll need to use the Web Recovery method to update the bootloader. Might be easiest to get your hands on an ethernet expansion.
Hello to all,
has anyone ever used vnstat package? Is there any information for the onion version?
Or may be an alternative?
I need to calculate the daily megabite consumption for an Internet connection.
Thanks
Go-to resource for frequently asked technical questions
45
Topics
72
Posts
Software-based (bit-bang) I2C bus on the GPIOs is doable!
Check out the OpenWRT documentation on this topic: https://openwrt.org/docs/techref/hardware/port.i2c#i2c_over_gpio
Setting up a Software I2C Bus
Install the required kernel modules
opkg update
opkg install kmod-i2c-gpio-custom
Setup a bus:
insmod i2c-gpio-custom bus<BUS NUMBER>=<BUS NUMBER>,<SDA GPIO>,<SCL GPIO>
Example
For example, to setup a SW I2C bus with SDA on GPIO18 and SCL on GPIO19:
insmod i2c-gpio-custom bus1=1,18,19
If all goes well, there will be a message in the kernel log:
[ 308.931002] Custom GPIO-based I2C driver version 0.1.1
[ 308.936785] i2c-gpio i2c-gpio.1: using pins 18 (SDA) and 19 (SCL)
And there will be a new I2C bus 1 device available:
root@Omega-F195:/# ls /dev/i2c-*
/dev/i2c-0 /dev/i2c-1
Notes:
Check out the Omega2 pinout and GPIOs article in the documentation to select your GPIOs
The Omega's hardware I2C bus is occupying the bus0 label, so your new sw i2c bus will need to be bus1
Keep in mind this is bit banging so the timing is not exact. However since I2C is synchronous it should not be a problem.
If you're using Onion's Omega2 firmware, you'll need to be on the latest available firmware to install the required kernel modules. See our documentation for more details.
Changing the SW I2C Bus Speed
If you are using SW I2C over GPIO, then when you insert the kernel module you can specify a delay value
For example:
insmod i2c-gpio-custom bus1=1,5,4,udelay
where I2C speed (kHz) = 500 / udelay
udelay can only be an integer
Keep in mind this is bit banging so the timing is not exact however since I2C is synchronous it should not be a problem.
