01
What you'll need
Components Required
Components- 116X2 LCD Display
- 2ESP8266 Microcontroller
- 3Breadboard
- 4Jumper Wires
- 53.7V Li-ion Battery
- 6Blynk App
02
Wiring
Projects Connections
Wiring diagramConnections
1
LCD (16×2 Parallel)
According to your code
LiquidCrystal lcd(D4, D3, D2, D1, D6, D5);
Connections are
| LCD Pin | NodeMCU Pin |
|---|---|
| RS | D4 (GPIO2) |
| EN | D3 (GPIO0) |
| D4 | D2 (GPIO4) |
| D5 | D1 (GPIO5) |
| D6 | D6 (GPIO12) |
| D7 | D5 (GPIO14) |
| VSS | GND |
| VDD | 5V |
| RW | GND |
| V0 | Middle pin of 10K Potentiometer |
| LED+ | 5V through 220Ω |
| LED- | GND |
2
Buzzer
Use an Active Buzzer.
| Buzzer | NodeMCU |
|---|---|
| + | D7 (GPIO13) |
| - | GND |
03
How it works
Project Logic
Start│▼Initialize NodeMCU│├── LCD├── WiFi├── Blynk└── Buzzer│▼Connect to WiFi & Blynk│▼Display "Waiting for Msg"│▼Wait for Blynk Message (V1)│Message Received?│ │No Yes│ ││ ▼│ Clear LCD│ ││ Display Message│ ││ Turn ON Buzzer│ ││ Delay 300 ms│ ││ Turn OFF Buzzer│ │└────────────┘
04
Implementation
Code & Program
Source Code
Download the complete source code for this project.
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