Try the following steps:

uci set onion.console.setup=1
uci set onion.console.install=1
uci commit onion
console-install-tool

Thanks to everyone for the answers and interesting stories! I solved my problem by applying the DS-DS converter LM2596.

Hello. Tell, please, how I can power my Omega2 from 3.7 volts? I know, exist board Power Dock, but I need compact solution.

@Lex-Slaghuis
The installer has installed everything correctly. It is so specifically conceived that when entering on 192.168.3.1, Onion OS was opened because Onion console is not installed in new Omega2 during installation. To fix this, you may need to edit the file /www/index.html

Hey. An update was recently released in which Onion added support for all Python2 modules for Python3: https://onion.io/2bt-python3-modules/
Try to enter

opkg install python3-onioni2c

Hey. I am very glad that this event happened! I hope that developers will more often tell us such wonderful news!

How I can install library onionI2C for Python3?

1. Is the pinout diagram from Оmega-2 suitable for Omega-2 +?
   

2. Can I use pins 6, 7, 8, 9 as GPIO?

3. Is there an Onion Gpio library for Python 3?

Thanks in advance for answers

@David-Kerr
First I'm running from a 3.7V cell, and then trying a 5V power supply. I use TO220 with no heatsink. After several measurements, I noticed that the output of the LM3940 has 3.28V without load. When I connect Omega, the voltage drops to 3.1V, which is not enough for Omega.

Try the following steps:

uci set onion.console.setup=1
uci set onion.console.install=1
uci commit onion
console-install-tool

@David-Kerr
I bought an LM3940, put an output capacitor with a capacity of 220 microfarads, but Omega does not start even with an input voltage of 5 volts. The orange LED starts flashing, but turns off after a few seconds.

Please tell me which web server uses Omega2 and PHP7 can be connected to it.

@Radek Try to do as it is written here: https://docs.onion.io/omega2-docs/uart1.html. Only instead of /dev/ttyS1 write /dev/ ttyS2

@David-Kerr
I opened the datasheet on the LM2940, but it says that the output voltage is from 5 to 15 volts.
https://html.alldatasheet.com/html-pdf/8827/NSC/LM2940/37/1/LM2940.html

Thanks to everyone for the answers and interesting stories! I solved my problem by applying the DS-DS converter LM2596.

@Radek
I tried to connect my Omega directly to a 3.7 volt lithium battery, but the orange LED blinked once and that’s it. It’s as if Omega has gone to the defense, although I’m not sure if she is in it.

Hello. Tell, please, how I can power my Omega2 from 3.7 volts? I know, exist board Power Dock, but I need compact solution.