RIoT Environment Sensing Board

RIoT Environment Sensing Board

The RIOT-001 and RIOT-002 are environment sensing boards which monitor the following items. The information they transmit with Bluetooth Low Energy (BLE) can be displayed on smartphones or tablets where an application programmed for these boards is installed.

  • RIOT-001: temperature, humidity, atmospheric pressure, illuminance
  • RIOT-002: temperature, humidity, atmospheric pressure, illuminance, acceleration

The RIOT-001 and the RIOT-002 contain our power management ICs for energy harvesters, ultra-low current consumption, and low noise and achieve independent power generation, prolongation of battery operating time, and high-accuracy sensing, all of which IoT edge devices require. These boards can make it easy to develop new IoT edge devices and contribute to shortening the construction period of those devices.


Charging from Photovoltaic Panel to Secondary Battery

A buck DC/DC switching regulator for energy harvesters extracts electric power from an indoor-use photovoltaic panel. The product has a maximum power point control function to configure a voltage at which a photovoltaic panel can produce its maximum power, and therefore optimizes the amount of photovoltaic power generation. In addition, a reverse current protection prevents charging loss.

High-efficiency Operation

A buck-boost DC/DC switching regulator with ultra-low current consumption supplies electricity for an MCU, BLE, and sensors, which contributes to achieving a high-efficiency operation at both standby and active modes. The wide operating voltage from 1.8 V to 5.5 V also enables the board to make efficient use of the secondary battery power.

Battery Monitoring with Low Current Consumption

One of the conventional ways of monitoring battery voltage is to input divided voltage to the ADC of an MCU by using resistor dividers. However, this circuit structure enlarges current consumption of the board. Instead, by using an LDO regulator including a battery monitor, a low current consumption battery voltage monitoring function can be constructed with ease.

Maintenance-free Operation

Each board is equipped with the following secondary battery respectively. When fully charged, the secondary battery can continue to operate the RIoT environment sensing board for approximately one day or more. (A theoretical value.) Connecting a photovoltaic panel suitable for the specifications of the RIoT board enables maintenance-free operation.

Mounted Products

  • RIOT-002

    Select one of the following.

    • NICHICON CORPORATION, SLB series (0.35 mAh)
    • Murata Manufacturing Co., Ltd., CT04120 (3 mAh)
    • NGK Insulators, Ltd., EnerCera®-ET series (4 mAh)

    Note) EnerCera® is a registered trademark of NGK Insulators, Ltd.

  • RIOT-001
    • NICHICON CORPORATION, SLB series (0.35 mAh)

Terms of Use

These products are sample boards for customers to understand power management ICs of Nisshinbo Micro Devices Inc. Safety, reliability, compatibility, etc., which are commonly required by final products for consumers or industries, are not considered in design, nor in sales, nor in manufacturing.



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