Look for a small wall box with a tiny screen on the front. Take it out of the packing. Set it on a table.
Photo placeholderBuilding Sensor in the open box with cablesSave your photo as img/manual/sensor/01-unbox.jpg
Take the sensor out and set the cables next to it.
Do you have it on the table now?
Find the little screen
Turn the box until you see a small dark window. That window is the screen. It will light up after we give it power.
Also look for:
A row of lights
A small button
A square hole for a network cable (it has a plastic clip that clicks)
An oval hole for a USB-C charger, the same shape many phones use
Photo placeholderFront of the Building Sensor with the screen and lightsSave your photo as img/manual/sensor/02-front-screen.jpg
The screen is the small window on the front.
Do you see the small screen?
Keep looking around the box
It may still be in a bag, or sitting on its back. The screen is a small glass window, about the size of a postage stamp, on the front face.
If you only see vents or a blank plastic back, rotate it. The screen side is the front.
Did you find the screen?
Put it in the room you care about
Carry it to the room you want to watch: basement, garage, cabin, sprinkler room, server closet, or any room you are not standing in all day.
Set it about chest height, with the screen facing you. A shelf is fine for now. You can screw it to the wall after it is working.
Keep it away from a heater, an oven, or a window with hard sun. Those spots fool the temperature.
Photo placeholderBuilding Sensor sitting in the room it will watchSave your photo as img/manual/sensor/03-location.jpg
Put it in the room you want to watch, with the screen facing you.
Where is it right now?
Screw it to the wall
Photo placeholderMounting holes on the back of the Building SensorSave your photo as img/manual/sensor/04-wall-mount.jpg
Use the holes on the back. Leave the cable holes free.
Hold the box on the wall where you can read the screen.
Mark the holes with a pencil.
Put in screws so the box sits flat and does not rock.
Leave room above or beside it for the cable.
Is it on the wall?
How will we feed it power?
The box needs power and internet. Pick the picture that matches what you have.
Network cable: thicker than a phone charger, with a little plastic clip that clicks. If that cable comes from a wall jack, a network switch, or a small brick labeled PoE, it can feed both power and internet.
USB-C charger: oval metal end, like many phone chargers. That only feeds power. Internet then comes from Wi-Fi, the same Wi-Fi your phone uses.
Photo placeholderNetwork cable next to the sensor jackSave your photo as img/manual/sensor/05-poe-cable.jpg
A network cable clicks into the square hole.
What do you have next to the sensor?
Let's pick the cable together
Hold each cable in your hand.
If the end is square-ish with a plastic tab that clicks, that is the network cable. Use that one if you have it.
If the end is a small oval of metal, that is USB-C. Use that with a wall charger, then we will join Wi-Fi.
Photo placeholderUSB-C charger plugged into the sensorSave your photo as img/manual/sensor/06-usb-power.jpg
USB-C is the oval charger port.
Which end did you find?
Plug in the network cable
Find the square hole on the sensor. It matches the click-tab cable.
Push the cable in until it clicks. Give it a gentle tug. It should stay.
Wait up to one minute. The screen should light up and show words.
Photo placeholderEthernet cable fully seated in the Building SensorSave your photo as img/manual/sensor/05-poe-cable.jpg
Push until it clicks.
What happened after you plugged it in?
The cable may not be feeding power
A regular network cable from a computer does not always feed power. You need a PoE switch or a small injector brick, or we switch to a USB-C charger and Wi-Fi.
Try a different network cable.
If you have a small black injector with two network holes, plug wall power into the injector, then the cable from the injector into the sensor.
What do you want to try?
Watch the screen for a minute
It is looking for the internet. Words may change: Checking Network, Starting POE, Hunting DHCP, Testing Internet. That is normal.
You want to see Poe Mode Found, or a temperature number.
What does the screen say now?
Ethernet did not get internet
Unplug the cable, click it in again, and wait one more minute. If it still hunts, we will use Wi-Fi. That works well.
Ready for the next try?
Power it with USB-C
Plug a USB-C charger into the oval port on the sensor.
Plug the charger into the wall.
Wait until the screen lights up.
Photo placeholderUSB-C cable powering the Building SensorSave your photo as img/manual/sensor/06-usb-power.jpg
Use a wall charger, not a computer USB port if you can help it.
Did the screen light up?
Try a different charger
Use a wall charger that can run a phone. Try a different USB-C cable. The port is the oval one, not the square network hole.
Did a new charger wake the screen?
Join the sensor's setup Wi-Fi
Use your phone for this part, standing next to the sensor.
Open the phone's Wi-Fi list, the same place you join home Wi-Fi.
Look for a name that starts with CalSense_.
Tap that name and join it. Your phone may say it has no internet. That is OK.
A page should open asking for your building Wi-Fi. Pick your normal network, type the password, then tap Connect Automatically.
The sensor saves that and restarts.
Photo placeholderPhone Wi-Fi list showing a CalSense setup networkSave your photo as img/manual/sensor/07-wifi-setup.jpg
Join CalSense_, then pick your normal Wi-Fi.
Did you join CalSense_ and pick your building Wi-Fi?
Make the setup Wi-Fi show up
Stand within a few feet of the sensor.
Press and hold the button on the sensor for about three seconds. The lights fill while you hold. Then let go.
Wait 20 seconds.
On the phone, turn Wi-Fi off and on, then look again for CalSense_.
Photo placeholderButton on the Building Sensor caseSave your photo as img/manual/sensor/17-button.jpg
Hold the button about three seconds to start setup Wi-Fi again.
Do you see CalSense_ now?
Find the Wi-Fi password
That password is the one your phone already uses at this building. Check:
A sticker on the internet router
Whoever set up the internet
A saved password on a laptop under Wi-Fi settings
Come back to this page when you have it. The sensor can wait, plugged in.
Do you have the password now?
Wait for Wifi Mode Found
The sensor restarts and joins your building Wi-Fi. Give it up to two minutes. You want Wifi Mode Found or a temperature number.
What does the screen say?
Write down the sensor's ID
The website needs a code called a MAC. It is the sensor's ID. It looks like six pairs of letters and numbers:
DC:B4:D9:06:B1:30
Look on the screen, especially if it says Not Setup Yet. You can also look on a sticker on the case. Take a photo with your phone so you do not have to memorize it.
Photo placeholderMAC address on the Building Sensor screenSave your photo as img/manual/sensor/08-mac-screen.jpg
The MAC is the ID you will type on the website.
Photo placeholderMAC sticker on the caseSave your photo as img/manual/sensor/09-mac-sticker.jpg
The sticker has the same ID if the screen is hard to read.
Do you have that code written down or in a photo?
Let's find the code
Press the button on the sensor once. The screen may change. Look for letters and numbers with colons.
Turn the box and look for a white or silver sticker.
If the screen is a temperature, press the button until you see network info or the ID.
Did you find the code?
Have you used Caltuck Cloud before?
Keep the sensor plugged in. The website only accepts a sensor that is on right now.
Have you ever signed in at caltuck.cloud?
Create your account
Open the signup page on this phone or computer. Type the MAC from your photo. Then fill in a house or business name, your email, a username, and a password of at least 8 characters.
Photo placeholderSignup page with the MAC typed inSave your photo as img/manual/sensor/10-register-mac.jpg
Type the MAC yourself. Keep the sensor plugged in.
What happened on the signup page?
The website has not seen the sensor yet
That means the sensor is not talking to the internet, or it just got on and needs a minute.
Look at the screen. You want Poe Mode Found or Wifi Mode Found, or a temperature.
Wait a full minute with the cable still in.
Type the MAC again, the same way it is printed, including the colons if they are on the sticker.
Ready to try signup again?
This sensor already belongs to an account
Someone already used this MAC. If that is your company or house, ask that person to add you as a user. If you bought a brand-new unit and see this, call us.
Photo placeholderDashboard showing a named Building SensorSave your photo as img/manual/sensor/11-dashboard.jpg
Name it after the room: Basement, Sprinkler Room, Cabin.
On the dashboard, open this sensor and name it after the room. "Office" is harder later than "Shop sprinkler room."
Did you name it?
Tell it when to text you
This is the whole point. Open alert settings for this sensor.
For a heated building, a low of 45°F and a high of 85°F is a safe start. Change those if the room is a freezer or a greenhouse.
Add your cell number and email.
Turn on a notice if the sensor goes quiet or loses power.
Photo placeholderAlert settings with high and low temperatureSave your photo as img/manual/sensor/12-alerts.jpg
Put your phone number in so a problem can text you.
Did you add your phone number and a temperature range?
If you skip alerts, the box still records temperature, and nobody gets a text when the room fails.
Should this box watch a door?
A small magnet pair on a door or window can tell you when it opens.
Photo placeholderMagnetic contact on a door frameSave your photo as img/manual/sensor/14-door-wired.jpg
One piece on the door, one on the frame, almost touching when closed.
Do you want to wire a door or window now?
Wire the door contact
Photo placeholderScrew terminals for door wiresSave your photo as img/manual/sensor/13-terminals.jpg
Two wires go to one pair of screws.
Put one piece on the door and one on the frame so they line up when the door is shut.
Run the two wires to one pair of screws on the sensor and tighten them.
Close the door. The dashboard or screen should show closed.
Open the door. It should change to open.
Does it change when you open and close the door?
Line up the magnet
Slide the two pieces so they almost touch when the door is shut. Tighten the terminal screws. Try a different screw pair if you have more than one door terminal.
Did that fix it?
Did you get an extra plug-in module?
Some kits include a second piece that plugs into the bottom: fridge probe, HVAC probes, water sensor, voltage, or relay. You only plug in one extra piece.
Photo placeholderModule plugged into the bottom jackSave your photo as img/manual/sensor/15-module-jack.jpg
One extra module in the bottom jack.
Do you have an extra module to plug in?
Plug in one module
Unplug power from the sensor.
Seat the module in the bottom jack.
Plug power back in.
In the cloud, pick that setup for this device: Fridge, HVAC, WaterBug, Voltage, or Relay.
Voltage mode watches battery voltage. Room temperature and humidity turn off while that module is in.
Is the extra module in?
The button and the lights
Photo placeholderStatus lights on the Building SensorSave your photo as img/manual/sensor/16-status-lights.jpg
Lights follow network and alerts.
A short press moves to the next screen: temperature, then network.
Hold about three seconds only when you want to clear Wi-Fi and start setup again.
Ready to wrap up?
You are set
The sensor is in the room, on the internet, and on your account. Leave it plugged in. It keeps watching after you close this page.
Come back to this wizard any time. Use Start over if you move the box to a new building.
One page. Check each box as you go. Leave extra modules and door wires for later if you want. Get the box online first.
Room
MAC ID
Put the sensor in the room you want to watch. Face the small screen toward you.
Give it power. Click a network cable into the square hole, or plug a USB-C phone charger into the oval hole.
Wait until the screen shows Poe Mode Found, Wifi Mode Found, or a temperature number.
If you used a charger (no network cable): on your phone, join the Wi-Fi named CalSense_. Pick your building Wi-Fi and type the password. Choose Connect Automatically.
Copy the MAC from the screen or the sticker. It looks like DC:B4:D9:06:B1:30. Write it on the line above. A phone photo works too.
Keep the sensor plugged in. On a phone, open caltuck.cloud/register.php. Type the MAC, then make a house name, email, username, and password (8 or more characters).
Sign in at caltuck.cloud. Name the room. Set a low and high temperature. Add your cell number so it can text you.
Leave it plugged in. You are done.
Need a person: (720) 499-0399 · support@caltuck.com · Mon–Thu 7am–5pm, Fri 7am–3pm Colorado time. Question-by-question help: caltuck.com/manual.php?=sensor
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8105 W I-25 Frontage Rd Unit 9, Frederick, CO 80516
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