HF31 – Thermo Hygrometer Barometer with Solar Charger


Hui Gardens HF31 thermo hygrometer barometer is a rugged solar powered environment monitoring device. The HF31 makes use of the Bosch BME280 sensor for its thermometer, hygrometer and barometer functions to measure air temperature, humidity and station pressure. Dew point is calculated from air temperature and humidity and displayed on a hi-res OLED display.

Protected by a transparent Nanuk 310 case, the Hui Gardens HF31 can withstand the elements while housing a solar panel that charges two internal user replaceable NiMH AA batteries. The brains of the HF31 is an Arduino compatible Adafruit Pro Trinket (3V) for low power consumption. HF31 is field programmable via the FTDI cutout in the panel and can be adjusted and calibration date set if you know what you’re doing. The Hui Gardens HF31 is a portable weather station that can be strapped to the outside of a backpack or left in the snow.

HF3 – WiFi RTD Meat Smoker Temperature Transmitter


Hui Gardens HF3 WiFi RTD meat smoker temperature transmitter prototype was created to allow my wife and I to monitor the temperature of her smoking creation without going out into the cold and having to manually look at the temperature display. It also allows remote monitoring should we need to run out on a quick errand.

The Hui Gardens HF3 is housed inside a Pelican 1010 case to protect it from the elements since this is meant to be outside where her Traeger smoker is. I found that the temperature probes supplied with her Traeger smoker is a PT1000 2 wire RTD with a 3.5mm aux plug on the end. That’s easy enough, I can work with that. The brains of the HF3 is an Arduino UNO Rev 3 with a WiFi shield and RTD amplifier. Powered by 4x AA batteries that fits inside the housing, I’ve run the Hui Gardens HF3 in the cold for over 12 hours. The HF3 sends the temperature data over WiFi to https://huigardens.com/hf3 allowing for remote monitoring.

To allow for easy hanging of the HF3 WiFi temperature transmitter using the supplied carabiner of the Pelican 1010 case, the temperature probe input is located at the bottom to help in inclement weather since it’s facing down.

Check out this sample temperature log of a smoked turkey the missus made.