Sensors

In this page we describe the different sensors we use and how to build them.

SHT31-D Adafruit board

To measure Temperature and Humidity at 4 different height, we use 4 SHT31-D Adafruit board. The communication with the board is done with I2C.

SHT31-D

Because the board allows only two addresses, we toggle the address pin of the different board on after the other. If we want to communicate with one board, we send a 1 to its address pin and a 0 to the address pins of the other board. This pin toggling is done by the firmware running on the Dust mote.

20160609_105510

 

connectors

 

 

Cabling:

Cable PIN
SDA PIN 9 / P1 Header SPIS_SSn (SDA)
SCL PIN 11 / P1 Header SPIS_SCK (SCL)
+3,3 PIN 22 / P1 Header VUSB_3V6 *
GND PIN 4 / P1 Header GND
S3 PIN 13 / P1 Header IPCS_MISO (GPIO6)
S2 PIN 14 / P1 Header IPCS_MOSI (GPIO5)
S4 PIN 15 / P1 Header IPCS_SSn (GPIO3)
S1 PIN 16 / P1 Header IPCS_SCK (GPIO4)

*For testing purposes only, it should go to PIN 20 / P2 Header VBATTERY on the Motes.

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