No support for Omega2 Pro i2c-exp / adc / python3 / power-dock

[t3therdev]

What package does this bug affect?

i2c-exp

Describe the bug

i2c-exp is not able to be compiled on 22.03 due to a lack of support for python2. We have been working on trying to port it over, has there been any work on getting the i2c-exp drivers working for the Omega2 Pro or LTE so we can use i2c to read battery voltages and get power-dock to work?

To Reproduce

Expected behavior

Getting work power-dock, i2c-exp driver for 22.03

Screenshots or Console output

Version Info (please complete the following information):

• Firmware version: 22.03 openwrt
• Package name i2c-exp, power-dock
• Repo branch (if applicable) openwrt-22.03

Additional context

[greenbreakfast]

Thanks for the issue. I'll address both packages here, but in future feel free to make separate issues.

Power Dock

Reading the battery level is actually very straight-forward. It involves reading 2 GPIOs and doesn't use the I2C bus at all.
The battery level is just based on this truth table:

	GPIO 18		GPIO16		Battery level
	(level1)		(level0)
	----------------------------------------
	HIGH		LOW 		4/4 - 100%
	HIGH		HIGH		3/4 - 75%
	LOW  		HIGH		2/4 - 50%
	LOW 		LOW		1/4 - 25%

Looking back, it was 100% overkill to write a C program to do this. At this point I would recommend writing a small sh script to read the battery level. See the beta firmware documentation on GPIOs for more info.

Let me know if you need some pointers with a script

I2C Exp

Can you give me more context on what you need the i2c-exp packages for?

Our preference is to not port these packages to the new firmware for a few reasons:

• They're an ok I2C implementation, but there's implementations out there that are better in every way (code quality, documentation, maintenance)
• Instead of maintaining old packages that provide marginal benefits, we want to focus our development efforts on what Omega2 users actually find important

That's why I ask about the context. If you need help with getting something specific working, we can work in that direction and/or suggest alternative methods.