Multi Indoor Climate Sensor consisting of a Pandauino Narrow, BME680 climate sensor, SGP30 VOC and CO2 sensor, PMS5003 particle matter sensor, a RTC and SD card.
The breakout boards are connected to the Pandauino via I2C, SPI and UART. As flash media controller, the USB2244-AEZG-06 is used. When the power to the Pandauino is turned on, a mosfet pulls the reset pin of the controller to ground, disabling any communication over USB. Whenever the Pandauino gets power, the MicroSD breakout board also gets power, and the storage is available for datalogging.