GPI

Read GPIO input state

Read the digital input state of GPIO pins.

Syntax

lager gpi [NETNAME] [OPTIONS]

Arguments

Argument	Description
NETNAME	GPIO net name (optional if default is set)

Options

Option	Description
--box BOX	Lagerbox name or IP address

---

Usage

# Read input state
lager gpi BUTTON1 --box my-lager-box

# Using default net
lager gpi

---

Output

Returns the digital state:

• 0 - Low (0V)
• 1 - High (3.3V or 5V depending on hardware)

$ lager gpi BUTTON1
1

---

Supported Hardware

Device	Pins	Voltage
LabJack T7	FIO0-FIO7	3.3V logic

---

Examples

# Check if button is pressed
STATE=$(lager gpi BUTTON1 --box lab-gw)
if [ "$STATE" -eq "1" ]; then
    echo "Button pressed"
fi

# Read multiple inputs
lager gpi BUTTON1 --box lab-gw
lager gpi SENSOR_INT --box lab-gw
lager gpi FAULT_PIN --box lab-gw

---

Related Commands

• lager gpo - Set GPIO output level

---

Notes

• GPI is for reading input pins only
• Use lager gpo to set output pins
• Default net can be set with lager defaults add --gpio-net
• Pin must be configured as input in net configuration