It is equipped with the Electrophoretic (electronic ink) Display (EPD), environmental (temperature, humidity, light, accelerometer) sensors, and Bluetooth connectivity making it easy to experiment and evaluate the Zephyr OS in these kinds of use cases:
- battery powered sensor node
- low-power, low-cost human-machine interface (HMI)
- for remote control and environmental sensor monitoring
- temperature and humidity monitor on your table
- product, name or price tag
- interactive badge for meetings and conferences
The link board ETH is an ethernet extension board compatible with the Arduino UNO R3 connector.
On the front of the board are RGB-LED, ADPS9960 and HDC1010 sensors, and Electrophoretic Display. The RGB-LED is controlled by the nRF52840 via GPIO pins. Display is controlled by the nRF52840 via SPI and 3 GPIOs.
On the back side of the board are all other components such as nRF52840, circuit for the Debug Adapter, On/Off and power source switch, battery holder, buttons and MMA8652 (accelerometer) sensor.
ADPS9960 is Digital Proximity, Ambient Light, RGB and Gesture sensor. HDC1010 is a digital humidity and temperature sensor. MMA8652 is a 12-bit Digital Accelerometer. All sensors are connected to the I2C bus and one GPIO pin each, which can be used as an interrupt source.
link board BASE is a passive expansion board and allows other link boards or third party shields in Arduino UNO R3 format to be connected to the reel board. In addition, it includes a NOTM.2 connector and more powerful DCDC converter then reel board.
link board BASE can be used in combination with other link boards or third party shields in two ways:
As an adapter
reel board is plugged into the link board BASE. Both peripherals on reel board and shields can be used as long as there is no conflict between I2C devices. Care should be taken to provide enough power to the complete circuit.
NOTM.2 adapter is removed from the reel board and connected to NOTM.2 connector on the link board BASE. The wiring to the shield connector is identical to the configuration above and no software modifications for the shield are necessary. Stand-alone configuration is more suitable for applications where peripherals on the reel board are not used or in conflict, power provided by the reel board is not enough, or for prototypes in the field.
Components on the link board BASE:
reel board Connector:
2x40 position edge connector.
Micro USB Connector:
USB can be used as power source. USB data lines are wired to NOTM.2 connector.
Connector for NOTM.2 adapter. If the connector is used then reel board should be removed from reel board connector.
SWD Connector X11:
Wired to NOTM.2 connector. A debug probe can be connected to program or debug MCU in Stand-alone configuration.
Alternative Power Source X5 or X9:
Positive pin is closer to the + character. Nominal voltage is 3.3V, there is no protection against reverse polarity or overvoltage. Use it with care.
Connector for link boards and third party shields in Arduino UNO R3 format. Only shields designed for 3.3V supply voltage are supported.
Meaning of the Power Source Switch positions:
link board BASE is powered from Alternative Power Source Connector X9 or X5.
link board BASE is powered from from USB connector (via DCDC converter).
link board BASE is powered from reel board. The available power is below 0.3W and depends on which source is used to power the reel board.
Pricing excl. VAT
The complete documentation for the reel board can be found here at the Zephyr Project.