Setting up Raspberry Pi 3

Let us get started with the schematics.

Set up Raspberry Pi 3 and the sensors as shown here:

Here is a table showing these connections:

Raspberry Pi and MCP3208

Refer to the following table:

Raspberry Pi pin number - pin name	MCP3208 pin number - pin name
1 - 3.3V	16 - VDD
1 - 3.3V	15 - AREF
6 - GND	14 - AGND
23 - GPIO11, SPI0_SCLK	13 - CLK
21 - GPIO09, SPI0_MISO	12 - DOUT
19 -GPIO10, SPI0_MOSI	11 - DIN
24 - GPIO08, CEO	10 - CS
6 - GND	9 - DGND

Moisture sensor and MCP3208

Refer to the following...