Intelligent thermostat design plan

According to statistics, my country's building energy consumption accounts for about 30% of the country's total energy consumption. As people's living standards improve, building energy consumption will continue to grow rapidly. In order to reduce building energy consumption, help users save electricity bills, and achieve more humane control, this requires temperature controllers to be more intelligent. This solution uses various sensors and wireless WIFI modules to receive weather forecast information on the network and control commands transmitted by users through the network to achieve the purpose of intelligent control.

The infrared sensor senses whether someone is at home. If you forget to turn off the air conditioner when you go out, it will automatically turn off the air conditioner. On the way home, users can use their mobile phone to remotely control the air conditioner in their home to start running. In this way, you can enjoy a comfortable living environment while optimizing energy consumption.

Smart thermostats track users’ temperature adjustments and custom schedule habits, as well as obtain weather forecasts over the Internet. Automatically help users set the temperature adjustment plan for the next week.

system structure

main controller

EFM32 is the world's lowest power consumption 32-bit microcontroller from Norway's Energy MICro and has rich peripheral interfaces. Power consumption per MHz when executing actual code from Flash is 180μA in active mode, 900nA in deep sleep mode, and 20nA in shutdown mode.

Capacitive touch buttons

The unique LESENSE module of EFM32 allows users to realize the touch capacitance function on peripheral hardware by using only a few copper foils on the PCB, eliminating the problem of aging of mechanical buttons on and off for a long time, and greatly improving the quality of the product.

TFT LCD display

EFM32 comes with its own TFT driver, which can directly drive TFT LCD, allowing the smart temperature controller to display more customer-customized information more clearly.

AR4100 wireless WIFI module

AR4100 is an 802.11n WIFI to SPI chip from Qualcomm in the United States. In power-saving mode, the current consumption is only 5uA; the wake-up time is only 2.2ms.

Solution advantages

Compared with traditional thermostats, smart thermostats achieve intelligent and user-friendly intelligent temperature control, which can achieve lower power consumption and save electricity bills. Enjoy a comfortable living environment while optimizing energy consumption.