3. Assembling

During assembling, some codes are required to be burned, so please install software first.

The whole assembling generally can be divided into two parts: assembling parts and wirings.

Step 1 Install the ESP32 Board and the Relay Module

1.1 Required components

Step 2Install the Fixing Frame for Battery Case and install the Feeding Cabin,connect the ESP32 board and the Relay Module

2.1 Required components

2.2

Assemble the wooden board X and O on bottom plate

2.8 Connect the ESP32 board and the Relay Module

Module	Wire	Pin
Relay Module	3PIN 20cm	IO25

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io25

Step 3 Install the Substructure of the house

3.1 Required components

3.10

3.11

Step 4 Install the Door of the Feeding Cabin

4.1 Required components

The acrylic sheet is packed separately, and it is recommended that you tear off its protective film to reduce the friction when it moves as a door.

4.2 Set Servo to 165°

⚠ WARNING — Read Before Proceeding:

Do NOT set the servo to 180°. The door mechanism does not require the full 0°–180° range. Setting it to the extreme end will cause the servo to press against the mechanical stop, which may overheat and permanently damage the servo motor.

Keep the board powered during installation. When the servo is powered and holding its angle, do NOT force the gear or door by hand. If the board is unpowered, the servo has no holding torque, and manually rotating the gear will shift the calibrated angle, causing misalignment after power-on.

Do NOT use brute force. If the door does not move smoothly, stop immediately and check the assembly. Forcing it will strip the servo gears.

Please note that this step is very important. Before installation, be sure to set the servo to 165° (with a 15° buffer reserved at each end to prevent mechanical damage).

Before mounting the servo, firstly please set the angle to 165° by programming with KidsBlock (Graphical programming).

Please refer to the software installation steps for details.

Connect Servo to ESP32 development board at pin IO26.

Open KidsBlock. Select ESP32 board and the correct serial port, and burn the following code to the board. The code sets the servo to 165°.

Important: Keep the board powered and the servo holding at 165° while you proceed to the assembly step. Do not disconnect power or manually move the gear until the door panel is fully installed.

4.3 Install Servo

4.4

Note: The screws need to be tightened to keep the servo stable, otherwise the door may get stuck

4.5

Install M1.4*6MM self-tapping screws as shown below

6e1caadec8b1ec99b0093200763607b6

4.8

Do not turn the gear after it is installed on the servo. If you have already turned the gear you will need to readjust the servo angle to 180°.

4.9

NOTE: When installing the lid of the feeding box, its opening should be fully closed.

4.10

4.11

4.12

4.13 Test the door

Connect Servo to pin IO26 of the ESP32 board. Connect yellow to S, red to V, black to G.

Connect 6 AA batteries to the DC 7-12V port of ESP32 board. (Batteries not included in the kit)

Upload the Test code

A. Connect the ESP32 board to the computer with the usb cable. Open the INO file inside the 6.1Servo.sb3 folder with KidsBlock .

B.Upload code

⚠ NOTE: After uploading the code, if the door cannot be opened and closed smoothly and the servo is hot, please turn off the power immediately to prevent servo burnout. Then check the items below.

Do NOT use brute force to move the door or gear at any time.

check:

Whether the plastic door has good contact and force points with the gear structure of the servo.
Whether the tip of the fixing screw on the gear structure of the servo is stuck with the plastic shell of the servo. If so, please loosen the fixing screw a little to prevent its tip from contacting the servo.

Step 5 Install the LCD display and the DHT11 Sensor

5.1 Required components

5.5 Prototype

5.6 Wiring

Connect modules via Dupont wires.

Module	Wire
Temperature and Humidity Sensor	3PIN 20cm
LCD 1602	4PIN (Black-Red-Blue-Green)

Pay attention to the color of the Dupont wire:

For temperature and humidity sensor, connect yellow to S, red to V, black to G.

5.7

Module	Wire
LCD 1602	4PIN (Black-Red-Blue-Green)

For the LCD display, connect green to SCL, blue to SDA, red to VCC, black to GND.

Step 6 Install the Ultrasonic Module

6.1 Required components

6.4 Wiring

Module	Wire
Ultrasonic module	4PIN (Black-Green-Blue-Red)

Pay attention to the color of the Dupont wire: For the ultrasonic module, connect blue to TRIG,green to ECHO, red to VCC, black to GND.

Step 7 Install the PIR Motion Sensor and Button Module

7.1 Required components

7.4 Wiring

Connect modules via Dupont wires.

Module	Wire
PIR Motion Sensor	3PIN 15cm
Button Module	3PIN 15cm

Pay attention to the color of the Dupont wire: Connect yellow to S, red to V, black to G.

Step 8 Install the Walls of the House

8.1 Required components

8.8 Prototype

8.9 Wiring

Module	Wire
Fan	4PIN Divided (Black-Red-Blue-Green)
Steam Sensor	3PIN 15cm
Photoresistor	3PIN 15cm

Pay attention to the color of the Dupont wire for the Fan:

Module Pin	Wire Color	ESP32 Board Pins
IN-	GREEN	io18
IN+	BLUE	io19
V	RED	V
G	BLACK	G

For Steam Sensor and Photoresistor: Connect yellow to S, red to V, black to G.

Step 9 Install the Roof of the house

9.1 Required components

9.4 Keep the wires organized

Step 10 Install the House and Ground

10.1 Required components

10.2

10.3

10.4 Bottom View

10.5

10.6 Arrange the wires

10.7

Step 11 Wiring the House

11.1

Pay attention to the color of the Dupont wire: Connect yellow to S, red to V, black to G.

NO.	Components	Wires	ESP32 Board Pins
1	Fan	4pin, Divided Bla ck-Red-Blue-Green	io18(IN-) \ io19(IN+)
2	PIR Motion Sensor	3pin 15cm	io23
3	Button	3pin 15cm	io5
4	Ultrasonic Module	4 pin,\ Divided Bla ck-Green-Blue-Red	D12(TRIG) D13(ECHO)
5	LCD 1602	4pin, Connected	I2C
6	Temperature and Humidity Sensor	3pin 20cm	io17
7	Steam Sensor	3pin 15cm	io35
8	Photoresistor	3pin 15cm	io34
9	Servo	–	io26
10	Buzzer	3pin 20cm	io16
11	LED	3pin 20cm	io27
12	Water Level Sensor	3pin 25cm	io33
13	Soil Humidity Sensor	3pin 20cm	io32
14	Water Pump	3pin 20cm	io25

11.2 Fan

Pass the Dupont wire connected to the fan through the hole marked 30 on the wooden board.

Components	Wire	ESP32 Board Pins
Fan	4PIN Divided (Black-Red-Blue-Green)	io18(IN-), io19(IN+)

Module Pin	Wire Color	ESP32 Board Pins
IN-	GREEN	io18
IN+	BLUE	io19
V	RED	V
G	BLACK	G

11.3 PIR Motion Sensor

Pass the Dupont wire connected to the PIR motion sensor through the hole marked 24 on the wooden board.

Component	Wire	ESP32 Board Pin
PIR Motion Sensor	3PIN 15cm	io23

Connect red to V, black to G, yellow to S.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io23

11.4 Button Module

Pass the Dupont wire connected to the button module through the hole marked 25 on the wooden board.

Component	Wire	ESP32 Board Pin
Button	3PIN 15cm	io5

Connect red to V, black to G, yellow to S.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io5

11.5 Ultrasonic Module

Component	Wire	ESP32 Board Pins
Ultrasonic Module	4PIN Divided ( Black-Green-Blue-Red)	io13(ECHO), io12(TRIG)

Connect red to V, black to G, blue to io12, green to io13.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V (io12)
G	BLACK	G (io12)
ECHO	GREEN	io13
TRIG	BLUE	io12

11.6 LCD 1602

Component	Wire	ESP32 Board Pins
LCD1602	4PIN Connected (Black-Red-Blue-Green)	I2C

Connect red to V, black to G, blue to SDA, green to SCL.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
SCL	GREEN	SCL
SDA	BLUE	SDA

11.7 Temperature and Humidity Sensor

Pass the Dupont wire connected to the button module through the hole marked 20 on the wooden board.

Component	Wire	ESP32 Board Pins
Temperature and Humidity Sensor	3PIN 20cm	io17

Connect red to V, black to G, yellow to io17.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io17

11.8 Steam Sensor

Component	Wire	ESP32 Board Pin
Steam Sensor	3PIN 15cm	io35

Connect red to V, black to G, yellow to io35.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io35

11.9 Photoresistor

Component	Wire	ESP32 Board Pin
Photoresistor	3PIN 15cm	io34

Connect red to V, black to G, yellow to io34.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io34

11.10 Servo

Pass the wire of Servo through the Hole 15, and then connect it to ESP32 board.

Component	Wire	ESP32 Board Pin
Servo	3PIN	io26

Connect red to V, black to G, yellow to io26.

Board Pin	Wire Color
V	RED
G	BLACK
IO26	YELLOW

11.11 Buzzer

Pass the wire of Buzzer through the Hole 17, and then connect it to ESP32 board.

Component	Wire	ESP32 Board Pin
Buzzer	3PIN 20cm	io16

Connect red to V, black to G, yellow to io16.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io16

11.12 LED

Pass the wire of LED through the Hole 7, and then connect it to ESP32 board.

Component	Wire	ESP32 Board Pin
LED	3PIN 20cm	io27

Connect red to V, black to G, yellow to io27.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io27

11.13 Water Lever Sensor

Pass the wire of water level sensor through the Hole 13, and then connect it to ESP32 board.

Component	Wire	ESP32 Board Pin
Water Lever Sensor	3PIN 25cm	io33

Connect red to V, black to G, yellow to io33.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io33

11.14 Soil Humidity Sensor

Pass the wire of soil humidity sensor through the Hole 11, and then connect it to ESP32 board.

Component	Wire	ESP32 Board Pin
Soil Humidity Sensor	3PIN 20cm	io32

Connect red to V, black to G, yellow to io32.

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io32

11.15 Relay Module

Component	Wire	ESP32 Board Pin
Relay Module	3PIN	io25

Module Pin	Wire Color	ESP32 Board Pin
V	RED	V
G	BLACK	G
S	YELLOW	io25

Pass the wire of Water Pump through the Hole 11 in the way as shown below:

The red wire of the water pump is connected to the middle terminal of the relay module, and the black wire is connected to the GND of the ESP32 board.

In addition, you need to use a Dupont wire to connect the left terminal of the relay module to the 3.3V of the ESP32.

11.16

Insert the male terminal of the Dupont wire into the female terminal of the relay module and tighten it with a screwdriver.

After the above steps, note that all the wiring has been finished. And wires of the LED, water level sensor, soil humidity sensor, buzzer and relay water pump have respectively passed through the holes of 7, 11, 13, 17 and 40 carved on the basswood board, preparing for the subsequent installation.

3. Assembling

Step 1 Install the ESP32 Board and the Relay Module

1.1 Required components

1.2

1.3

1.4

1.5

Step 2Install the Fixing Frame for Battery Case and install the Feeding Cabin,connect the ESP32 board and the Relay Module

2.1 Required components

2.2

2.3

2.4

2.5

2.6

2.7

2.8 Connect the ESP32 board and the Relay Module

2.9

Step 3 Install the Substructure of the house

3.1 Required components

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

3.11

Step 4 Install the Door of the Feeding Cabin

4.1 Required components

4.2 Set Servo to 165°

4.3 Install Servo

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

4.13 Test the door

Step 5 Install the LCD display and the DHT11 Sensor

5.1 Required components

5.2

5.3

5.4

5.5 Prototype

5.6 Wiring

5.7

Step 6 Install the Ultrasonic Module

6.1 Required components

6.2

6.3

6.4 Wiring

Step 7 Install the PIR Motion Sensor and Button Module

7.1 Required components

7.2

7.3

7.4 Wiring

Step 8 Install the Walls of the House

8.1 Required components

8.2

8.3

8.4

8.5

8.6

8.7