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 table:

MCP3208 pin number - pin name	Sensor name - pin number
1 - A0	Rain sensor - A0
2 - A1	Moisture sensor - A0

Raspberry Pi and DHT11

Refer to the following table:

Raspberry Pi number - pin name	Sensor name - pin number
3 - GPIO2	DHT11 - Data

 

All grounds and all 3.3V are connected to a common point.

Once we have connected the sensors as shown previously, we will write the code needed to interface with the sensors.

Before we go further, we are going to copy the entire Chapter 2, IoTFW.js - I, and Chapter 3...