RIOT-002A

RIOT-002A is an environment sensing board consisting of a board, which is RIoT2 main board equipped with a secondary battery of SLB03070LR35 (0.35mAh). It can send information of temperature, humidity, and atmospheric pressure sensor, an ambient light sensor, and a 3-axis acceleration sensor mounted on the RIOT-002A to a tablet or other devices using BLE and can be operated with an indoor-use photovoltaic panel. The secondary battery mounted on the RIOT-002A stores electric power extracted efficiently from a photovoltaic panel by the R1801, a buck DC/DC switching regulator for energy harvesters. The RP605, an ultra-low consumption current buck-boost DC/DC switching regulator, and the RP118, a voltage regulator, efficiently supply electric power to a built-in BLE module in a MCU and various sensors. The RP605 also has a function to monitor the voltage of the secondary battery, which can be checked by sending it to a tablet or other devices as BLE data via an ADC of the BLE module.

• Operation available input voltage range from 2.3V to 5.5V
• 4.4V typical value of minimum chargeable input voltage
• Secondary battery charging voltage range from 2.62V to 2.78V
• Sensor system input voltage range from 1.77 to 1.83V
• 22µA typical value of avg operating current
• Charging from photovoltaic panel to secondary battery
• High-efficiency and battery monitoring with low current consumption
• Maintenance-free operation
• Available for customization using dedicated application: intermittent operation interval
• Customized using dedicated applications: operating day of the week and operating start and end time