One liner:
idevicediagnostics ioreg IOPower | grep -A7 'brightness ' | tail -n1 | egrep -o '\d+'
Explanation:
idevicediagnostics ioreg IOPower
This gives a lot of hardware info!
idevicediagnostics ioreg IOPower | grep -A7 '
Explanation:
idevicediagnostics ioreg IOPower
This gives a lot of hardware info!
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