Skip to content

TEMP-1B Temp Probe

The TEMP-1B comes with an optional temp probe which can be used to monitor a fridge, freezer, fish tank, pool, hot tub, etc. It includes a protected cable but the TEMP-1 itself needs to stay in a cool environment.

1. To use your temp probe simply take it out of the package and insert it into the 3.5mm port on your TEMP-1B.

Temp probe plug being inserted into the 3.5mm port on the TEMP-1B

Temp probe plug fully inserted into the TEMP-1B 3.5mm port

2. Once inserted, proceed to step 3 unless you have a battery in it

If you are using it with a battery you need to push the reset button.

The TEMP-1B looks for the temp probe when it boots and if it is not there then the sensor is marked as failed and will not work properly in Home Assistant. You need to click the reset button if you have a battery in it or power cycle your TEMP-1B to make it reliably use the new food temperature probe.

 

TEMP-1B with the black-cable temperature probe plugged in and coiled

3. Go to the device page of your TEMP-1B in Home Assistant and choose the Temperature Probe.

Home Assistant Select Probe dropdown with Temperature selected

Do not leave your sensor outside or let it get wet!

The TEMP-1B should not be left outside for long periods of time or allowed to get wet. You will need to use another case around your TEMP-1B if there will be high moisture content in the air or if it is expected to rain.

Example images of the long temperature probe in a mini freezer:

Temperature probe cable running into a mini freezer and hanging from the wire shelf

Flat probe cable routed over the freezer door frame and out to the side

Probe Pinout

The 1.5m and 20cm DS18B20 temp probes use a standard 3.5mm TRS plug. Wire yours the same way if you're building your own probe or repairing a cut cable.

3.5mm temp probe plug with arrows labeling the sleeve GND, ring Data, and tip 3v

Contact Signal
Tip 3.3V
Ring Data
Sleeve GND