• Sensor
Apollo Automation

TEMP-1 Temperature Sensor

$24.99
$24.99
Shipping calculated at checkout.

For the most accurate temperature readings, it is designed to be used with one of the optional probes. The onboard AHT20-F sensor may be affected by heat from the ESP, but using sleep settings helps ensure accurate temperature and humidity measurements.
 
The TEMP-1 Temperature Sensor is designed for seamless integration with ESPHome and Home Assistant via WiFi.

It is available in two versions:

• A USB-C powered model for continuous operation.

• A battery-powered model for flexible placement, using a rechargeable RC-CR123A or 16340 battery (not included). This version enables cable-free operation, making it ideal for locations without constant power.

The TEMP-1 delivers accurate and reliable temperature readings with multiple probe options. Built-in WiFi and Bluetooth connectivity ensure easy smart home integration and automation. An onboard RGB LED and buzzer provide real-time alerts, while the AHT20-F sensor measures ambient air temperature alongside probe readings.

A 3.5mm jack supports two optional temperature probes or a food safe probe (sold separately), allowing customization for specific monitoring needs. Its compact and durable design ensures seamless integration into any environment while maintaining high performance. 2 probes are flat cable submersible probes and 1 probe is a food safe stainless steel non dishwasher safe.

As part of Apollo Automation’s commitment to open-source innovation, the TEMP-1 is built for maximum flexibility and reliability. Whether you choose the USB-C or battery-powered model, it offers a powerful combination of functionality, privacy, and precision for all your temperature monitoring needs.

GitHub

Printables

Version:

Food Safety Monitoring

  • Fridge/Freezer Monitoring: Ensure your fridge or freezer maintains safe temperatures for food storage. The flat cable probe can fit through seals without interfering with the door closure.
  • Cooking and Baking: Use the food-safe stainless steel probe to monitor grilling, roasting, or baking temperatures in real-time.

Aquatic Environments

  • Fish Tank Monitoring: Keep a close eye on aquarium water temperatures with the waterproof probe to maintain a stable and healthy environment for aquatic life.
  • Pool and Hot Tub Monitoring: Track water temperatures in pools or hot tubs (with waterproof housing) for safety and comfort.

Home and Building Automation

  • Attic Fan Control: Automate attic fans to turn on when temperatures rise above a set threshold, improving ventilation and energy efficiency.
  • HVAC System Monitoring: Monitor ambient temperature to optimize your heating, ventilation, and air conditioning system's performance.

Outdoor and Remote Applications

  • Greenhouse Temperature Management: Maintain the perfect growing environment for plants in a greenhouse, even in remote areas, using the battery-powered version.
  • Remote Monitoring: Monitor temperature in locations without constant power, such as sheds, barns, or outdoor storage units.

General Environmental Monitoring

  • Room Temperature Tracking: Use the onboard AHT sensor to monitor indoor environments for comfort and energy efficiency.
  • Cold Storage Units: Monitor temperature in commercial or residential cold storage units to ensure proper operation.

Safety Alerts

  • Overheat Detection: Use the buzzer or Home Assistant integration to trigger alerts when temperatures exceed safe levels in critical areas like server rooms or electronics enclosures.
  • Assembled sensor with case
  • Apollo sticker

We hope to build a community on our Discord and continue delivering products the community wants. Our team will be there to help answer any questions, suggestions, or problems you might have.

Join our Discord.

Please see our Apollo Wiki for more information.

Product Details

ESP32-Based Platform: Fully compatible with ESPHome and Home Assistant, ensuring local, private, and open-source operation.

Power Options: Available in two versions:
- Non-Battery Version: Ideal for continuous power setups.
- Battery Version: Uses a rechargeable CR123A or 16340 battery (not included), providing flexibility for installations without constant power access.


Connectivity: WiFi and Bluetooth for seamless integration and automation in your smart home.

Sensor Interface: Equipped with a 3.5mm jack for connecting optional external temperature probes (sold separately). Compatible probe options include:
- 1.5m (~5ft) waterproof flat cable (DS18B20 sensor). Max 85°C 185°F
- 20cm (~8in) waterproof flat cable (DS18B20 sensor). Max 85°C 185°F
- 1m (~3ft) stainless steel food-safe probe (NTC sensor). Max 204°C 400°F Not dishwasher safe

Onboard Sensors: Includes an AHT20-F sensor for temperature and humidity monitoring.

Alerts: Features an RGB LED and buzzer for customizable real-time notifications.

Battery Life: The battery-powered version offers up to 6 months of battery life with optimized sleep settings.

Additional Notes:

Accuracy Recommendations: To ensure the onboard AHT sensor provides accurate temperature and humidity readings, the device can utilize sleep functionality to reduce heat buildup from the ESP chip.

Customization: As part of Apollo Automation’s commitment to open-source innovation, the TEMP-1 allows users to modify and extend its functionality to suit specific needs.

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Customer Reviews

Based on 33 reviews
82%
(27)
9%
(3)
3%
(1)
0%
(0)
6%
(2)
100.0
100.0
M
Michael R.
Great temp sensor

Great sensors for fridge and freezer

K
Kevin L.
Temp 1

Works as advertised

M
Michael M.

TEMP-1 Temperature Sensor

A
Andy N.
Love the Wifi

I love the sensors. They were very quick to set up and I already have them integrated into my Home Assistant setup. My HA is set up on a docker container and doesn't have access to Bluetooth. I have been waiting for a quality Wifi Temp sensor. Thanks!

E
Eric D.
Overall good product but has some issues

The setup was very easy but I have a lot of frost buildup where the probe enters the freezer. The freezer can't get a good seal due to that so thats a bit of a pain. Not sure if there is a thinner cord or not

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