Use your phone as a key and see how BLE solutions can create sparks with smart homes!

Have you ever encountered any of the following embarrassing situations:

Situation 1: Relatives or friends come to visit you, but you have to work overtime or are stuck in traffic. They don’t have the key to your house, so they can only wait outside your door.

Situation 2: When you get home, it is pitch dark and you can’t find the light switch for a long time;

Situation 3: I want to take a shower as soon as I get home, but I realize that I turned off the water heater when I left home in the morning...

With the development of science and technology and the application of various communication technologies, the above conditions will no longer be a problem. Silicon Labs' latest BLE solution EFR32BG can perfectly solve this series of problems.

Compared with Wi-Fi , which is commonly used in homes, BLE has the absolute advantage of low power consumption; compared with ZigBee , which is widely used in smart homes , BLE has the advantages of simple networking and direct connection to mobile phones. Figure 1 shows the application of BLE in smart furniture.

Figure 1 Schematic diagram of BLE application in smart home

SiliconLabs' latest EFR32BG series products have better wireless transceiver performance (receiver sensitivity -94dBm ) and a wider operating temperature range ( -40~85 ℃) than similar products. At the same time, the product also comes with Silicon Labs ' low-power EFM32 MCU , which perfectly combines the low-power advantages of EFM32 MCU and low-power Bluetooth. One chip can perfectly realize BLE transceiver and low-power control functions. EFR32 is indeed a very good choice for smart home solutions. At the same time, the excellent wireless transmission performance provides a new option for problems such as wall penetration in smart homes. Figure 2 is a schematic diagram of the structure of EFR32BG .

Figure 2 EFR32BG structure diagram

EFR32BG has rich analog and digital peripherals as follows:

• ADC （ 12 位、 1 Msps 、 286 µA ）

• Current DAC ( 4 -bit, sourcing or sinking)

• 2 × analog comparators

• 2 × USART （ UART 、 SPI 、 IrDA 、 I2S ）

• Low power UART

• I ² C (address recognition down to EM3 )

• Timers: RTCC , LE timer and pulse counter

• 12- channel ambient reflection system

• Up to 31 GPIOs

For more information on Silicon Labs’ EFR32 Blue Gecko SoCs , visit: http://cn.silabs.com/products/wireless/Pages/blue-gecko-bluetooth-smart-socs.aspx

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