LCD -> NODEMCU / POTANSIYOMETRE
VSS -> GND
VDD -> 3.3V
V0 -> POTANSIYOMETRE DATA (ORTA PİN)
RS -> D1
RV -> GND
E -> D2
D4 -> D3
D5 -> D4
D6 -> D5
D7 -> D6
A -> 3.3V
K -> GND
NOTE:
Potansiyometre sağ bacak GND
Potansiyometre sağ bacak 3.3V
Last active
June 12, 2019 17:19
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Nodemcu ve LCD ile web sitesindeki online sayacı
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| const io = require('socket.io')() | |
| let user = 0 | |
| io.on('connection', socket => { | |
| ++user | |
| console.log('Someone connected'); | |
| io.sockets.emit('event', `${user} Online`) | |
| socket.on('disconnect', function () { | |
| --user | |
| io.sockets.emit('event', `${user} Online`) | |
| }) | |
| }) | |
| io.listen(process.env.PORT || 3000) |
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| #include <ESP8266WiFi.h> | |
| #include <ESP8266WiFiMulti.h> | |
| #include <SocketIoClient.h> | |
| #define USE_SERIAL Serial | |
| #include <LiquidCrystal.h>; | |
| ESP8266WiFiMulti WiFiMulti; | |
| SocketIoClient webSocket; | |
| LiquidCrystal lcd(5, 4, 0, 2, 14, 12); | |
| void event(const char * payload, size_t length) { | |
| USE_SERIAL.printf("got message: %s\n", payload); | |
| lcd.setCursor(3, 0); | |
| lcd.print(payload); | |
| lcd.setCursor(3, 1); | |
| lcd.print("Ders.im"); | |
| } | |
| void setup() { | |
| USE_SERIAL.begin(115200); | |
| lcd.begin(16, 2); | |
| USE_SERIAL.setDebugOutput(true); | |
| USE_SERIAL.println(); | |
| USE_SERIAL.println(); | |
| USE_SERIAL.println(); | |
| for(uint8_t t = 4; t > 0; t--) { | |
| USE_SERIAL.printf("[SETUP] BOOT WAIT %d...\n", t); | |
| USE_SERIAL.flush(); | |
| delay(1000); | |
| } | |
| WiFiMulti.addAP("brsesen", "12345678"); | |
| while(WiFiMulti.run() != WL_CONNECTED) { | |
| delay(100); | |
| } | |
| webSocket.on("event", event); | |
| webSocket.begin("192.168.43.161", 3000, "/socket.io/?transport=websocket"); | |
| } | |
| void loop() { | |
| webSocket.loop(); | |
| } |
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https://github.com/timum-viw/socket.io-client
kullanılan paket bu, burdaki adımları yapmamız lazım