Usable pins for UnaShield V2S - UnaBiz/unabiz-arduino GitHub Wiki

Usable pins for UnaShield V2S

The following pins on the UnaShield V2S are reserved and may not be connected to other devices:

A2, A3: Connected to Grove Connector #2 (the Grove Connector below). This pin may be connected to other devices if you don't plan to use Grove Connector #2. Grove Connector #1 (the one above) is connected to I2C SCL/SDA, which supports multiple devices on the I2C bus (refer to the I2C note below)

D4, D5: Connected to WISOL module UART (serial interface). May not be connected to other devices.

D6: Connected to the UnaShield's onboard push button. This pin may be connected to other devices if you don't plan to use the onboard push button concurrently.

D7: Connected to WISOL module's wake-up pin, meant to wake up the WISOL module from deep sleep. May not be connected to other devices.

D8 & D9: Connected to the UnaShield's onboard LEDs. You may remove the jumper from J203 to disable the UnaShield's onboard LEDs, so that you can connect pins D8 and D9 to other devices.

I2C: Since the I2C interface is capable of dealing with multiple devices, each with a unique device ID, you may connect other devices to the I2C interface assuming that the other device IDs don't conflict with the onboard sensors (NXP MMA8451Q Accelerometer, BOSCH BME280 Temperature / Humidity / Pressure Sensor). Refer to the UnaShield V2S Technical Specifications for details.