Thermocouple

Read thermocouple temperature measurements

Read thermocouple temperature values from thermocouple nets through the Lager CLI for temperature measurement and monitoring.

Syntax

lager thermocouple [NETNAME] [OPTIONS]

Arguments

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

Options

Option	Description
--box TEXT	Lagerbox name or IP address
--help	Show help message and exit

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Usage

# Read temperature from thermocouple net
lager thermocouple TEMP_SENSOR --box my-lager-box

# List available thermocouple nets (when no net specified)
lager thermocouple --box my-lager-box

# Using default net
lager thermocouple

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Output

Returns temperature in degrees Celsius:

$ lager thermocouple TEMP_SENSOR --box my-lager-box
23.5

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Supported Hardware

Device	Type	Range
Phidget TMP1101	4-channel thermocouple	-200°C to +1300°C

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Examples

# Read temperature from sensor
lager thermocouple TEMP_SENSOR --box lab-gw

# Monitor multiple thermocouples
lager thermocouple TC1 --box lab-gw
lager thermocouple TC2 --box lab-gw
lager thermocouple TC3 --box lab-gw

# Use in shell script
TEMP=$(lager thermocouple OVEN_TC --box lab-gw)
if (( $(echo "$TEMP > 100" | bc -l) )); then
    echo "Temperature exceeded 100°C!"
fi

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Creating Thermocouple Nets

# Create a thermocouple net
lager nets create TEMP_SENSOR thermocouple 0 PHIDGET_SERIAL --box my-lager-box

Where:

• TEMP_SENSOR - Net name
• thermocouple - Net type
• 0 - Channel number (0-3 for 4-channel Phidget)
• PHIDGET_SERIAL - Phidget device serial number

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Notes

• Net names refer to names assigned when setting up your testbed
• Results are returned in degrees Celsius (°C)
• Only works with nets of type thermocouple
• If no net is specified and no default is set, lists available thermocouple nets
• Default net can be set with lager defaults add --thermocouple-net