There are ways to do it:
1. changing values in /etc/config/ioman
Execute vi /etc/config/ioman
Press I on your keyboard
Find either:
config acl 'acl0'
option state ' '
or either:
config adc 'adc0'
option state ' '
Once you've change values between ' ' , press ESC and write :wq to save and quit editing.
Restart service with /etc/init.d/ioman restart
And change states accordingly to active or inactive to change between current and voltage.
2. Through uci commands:
uci set ioman.adc0.state='active' (or inactive)
and
uci set ioman.acl0.state='inactive' (or active).
(Have in mind that one should always be disabled, you can't have both of them on at the same time.)
After uci set commands use:
uci commit ioman
luci-reload
To save and restart your services.
EB.