Blog of Adamant Namiki Precision Jewel Co., Ltd.

Transmission Distance of IoT Devices

   Last Modified:    Published: 2021/05

Many IoT devices currently on the market are fitted with wireless communication modules, such as Bluetooth modules, that are capable of transmitting signals several dozen meters at most. In recent years, demand has increased for IoT devices capable of transmitting signals several hundred meters, or even several kilometers.

As IoT utilization increases, the areas they are required to cover is becoming ever more significant. In such cases, it is desirable to increase the distance between the child unit (the sensor) and the parent unit (the IoT gateway) to decrease the required number of IoT gateways, which require power supplies. In addition, devices capable of long-distance communication use radio waves with robust signals (high RSSI). These signals can transmit past objects such as concrete walls, which significantly interfere with Bluetooth signals.

For these reasons, we are developing power generation devices (EME-harvesters) capable of powering long-distance wireless transmission modules (such as LPWA) for IoT applications to make positive contributions in fields such as industry, medicine, social welfare, transportation, logistics, life, entertainment, and other critical social infrastructures.

Adamant Namiki Precision Jewels focus on developing EH devices with simple mechanisms that can achieve high power generation. We have a full line-up of demonstration devices that can output tens to hundreds of milliwatts.

Battery-Free IoT Solution

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