Another project that demonstrate how to wire the ESP82366 Module and 16×2 i2C LCD as a network monitoring device to observe the network web/app server communication and can handle many host depend on your requirements. ESP8266 is a WiFi full TCP/IP stack and Microcontroller & coded can manage to do this task with the help of its own code libraries. The objective of this project is to run as standalone to monitor the server’s communication if it is disconnected from the network or remove from the internet. As you can see the diagram below there are two choices the first diagram uses 16×2 LCD Screen which is hookup to NodeMCU. The second diagram below is using ESP8233 12/12E module which you need to wire other component to make it worked properly.
Component Required
- ESP8266 12, 12E, ESP8266 NodeMCU, ESPDuino, WeMos
- USB UART / TTL
- LCD Screen (16×2/24×4)
- If your using ESP8266 12/12E chip that you to use 5v from the USB on your PC you need to use AMS1117 fixed 3.3v Voltage Regulator/ Step down Voltage Regulator .
- If your using Node MCU / ESPDuino, WeMOS you dont need voltage regulator
- Push Button / Tacktile Push Button
- Resistors (See the diagram below)
- Electrolytic Capacitors (See the diagram below)
Wiring Guide
Source Code
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/* 14CORE Test Code for: Server / Host Network Monitor with ESP8266 as stand alone. www.14core.com .:+osysso++:` `+yhs/-` `-+s+` `:/+++++++++` .:/++ooo++/-` .ooooooooooo+: :///////////- `odh/` `:y+` /ddhsooooooo+ /hddhsooooydddh sdddoooooosdddy` `////////////` -hds` `sy. +ddy` .ddd: sddy.dddo +ddd- .-----------` `hds :sssss/ -ossssso-yy` `hdd: oddy `ddd/oddd:......+dddo .++++++++++++ +dd` :sdddh` :ydddddddo +y/ .ddd+........ `hddy:.....:yddy.hdddddddddddy+. ```````````` ydy .hddd/+hdddhydddh/.+yo /hdddddddddd. :shddddddddhs/`+ddd:````-yddy- :ooooooooooo+ odh` sdddooyyyyyhddddyy.sy+ ` `......... ``.... ....` ```...` ` `` `` ` -dd+`::::` .:::- /yy. -oos+:-oos+--oos+: /o `+y o/: o:+/ h:`yos /+-`/+/+ s:y/y. /dd/ `+yy: +//+ +/:+ +/:+ -. `/ -:o.:/:`//+- + +:- :`-+:`://: +`o`+. -yds. `/yys- .`-.. .``` ```` .`` ` ` ``` ``-..` ` :ydy/.`````.-/oyhs: `+++oo+oo+:.+-++/-/ooo+o +:o/oo///:+/ .:oyhhhhhhhso:` `. ``` */ #include <Wire.h> #include <LiquidCrystal_I2C.h> //Download the library below #include <ESP8266WiFi.h> #include <ESP8266Ping.h> LiquidCrystal_I2C lcd(0x3F,16,2); //Set 0x27 if your using different i2c address (20,4 if your using 20/4 LCD) const char* ssid = "C0R3"; //Your WiFi Access Point Here const char* password = "1234567890"; //Your wifi password here const char* rhost1 = "www.14core.com"; //you can replace the host1 as you like const char* rhost2 = "www.google.com"; //you can replace the host2 as you like //const IPAddress rhost3 (192, 168, 111, 1); //const IPAddress rhost4 (192, 168, 111, 2); const long wlConTimeout = 30 * 1000; const long pingProbeHost = 2; const long wanCountFail = 2; const long delayWanCheck = 1 * 60 * 1000; const long delayReboot = 5 * 60 * 1000; void setup() { Serial.begin(115200); delay(100); Wire.begin(2,14); lcd.init(); lcd.backlight(); lcd.setCursor(0,0); lcd.print("14CORE | SERVER-MON"); lcd.setCursor(0,1); lcd.print(">Initializing..."); delay(4000); lcd.clear(); lcd.setCursor(0,0); lcd.print("CONNECTING TO"); lcd.setCursor(0,1); lcd.print("SSID>> "); lcd.setCursor(8,1); lcd.print(ssid); delay(4000); } void loop() { long chkProve = 0; long lastCheck = 0; while (true) { ++chkProve; lcd.clear(); lcd.setCursor(0,0); lcd.print("> WL/WAN PROBING..."); lcd.setCursor(0,1); lcd.print("PROC-ID > "); lcd.setCursor(10,1); lcd.print(chkProve); delay(2000); bool connected = ChkNetCon(); if (connected) { lastCheck = chkProve; } else { lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN FAILED"); lcd.setCursor(0,1); lcd.print("PROC-ID >"); lcd.setCursor(10,1); lcd.print(chkProve - lastCheck); delay(3000); lcd.clear(); lcd.setCursor(0,0); lcd.print("EXEC RETRY >"); lcd.setCursor(0,1); lcd.print("> TIME -"); lcd.setCursor(8,1); lcd.print(wanCountFail); delay(3000); } if (chkProve - lastCheck >= wanCountFail) { break; } sleep(">SLEEP MODE", delayWanCheck); lcd.setCursor(0,0); } // Reboot lcd.clear(); lcd.setCursor(0,0); lcd.print("CON IS FAILED"); lcd.setCursor(0,1); lcd.print(wanCountFail); delay(2000); lcd.clear(); lcd.setCursor(0,0); lcd.print("ALERT....."); lcd.setCursor(0,1); lcd.print("> REBOOTING"); delay(2000); RebootPower(); sleep(">TM SLP-REBOOT", delayReboot); //ESP.restart(); //Set to reboot itself return; } // SLEEP FUNCTION void sleep(const char* msg, long sleepTimeInMs){ lcd.clear(); lcd.setCursor(0,0); lcd.print(msg); lcd.setCursor(0,1); lcd.print("TIMER >"); lcd.setCursor(8,1); lcd.print(sleepTimeInMs); delay(sleepTimeInMs); } // REBOOT FUNCTION void RebootPower(){ lcd.clear(); lcd.setCursor(0,0); lcd.print("REBOOTING"); lcd.setCursor(0,1); lcd.print(">WL DISCONNECTED"); delay(31 * 1000); } // DISCONNECT FUNCTION void Disconnect(){ WiFi.disconnect(); lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN CON STATUS >"); lcd.setCursor(0,1); lcd.print(">DISCONNECTED"); delay(2000);} // PROVING CONNECTION/SENDING PING FUNCTION bool ChkNetCon() { bool success = false; success = Connect(); if (success) { success = false; success |= sendProbe(rhost1); success |= sendProbe(rhost2); /*You can add more remote host here*/ //success |= sendProbe(rhost3); //success |= sendProbe(rhost4); Disconnect(); } delay(100); if (success) { lcd.clear(); lcd.setCursor(0,0); lcd.print("SRV/HOST STATUS >"); lcd.setCursor(0,1); lcd.print(">>> HOST IS UP"); delay(3000); } else { lcd.clear(); lcd.setCursor(0,0); lcd.print("SRV/HST STATUS >"); lcd.setCursor(0,1); lcd.print(">>> HOST IS DOWN"); delay(3000); } return success; } // CONNECT FUNCTION bool Connect() { WiFi.begin(ssid, password); long varProgress = 10; long varProgIndex = 0; while (WiFi.status() != WL_CONNECTED && varProgIndex < varProgress) { delay(wlConTimeout / varProgress); ++varProgIndex; } delay(100); bool success = (WiFi.status() == WL_CONNECTED); if (success) { lcd.clear(); lcd.setCursor(0,0); lcd.print("CONNECTED TO/IP:"); lcd.setCursor(0,1); lcd.print("IP> "); lcd.setCursor(4,1); lcd.print(WiFi.localIP()); delay(4000); } else {; lcd.clear(); lcd.setCursor(0,0); lcd.print("CONNECTION STATUS >"); lcd.setCursor(0,1); lcd.print(">> TIMER: "); lcd.setCursor(3,1); lcd.print(WiFi.status(), true); delay(4000); } return success; } // CONNECTION STATUS FUNCTION void conStatus(long status, bool includeSpace) { switch (status) { case WL_NO_SHIELD: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">>>WL NOSHIELD"); delay(2000); break; case WL_IDLE_STATUS: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">>> WL IDLE"); delay(2000); break; case WL_NO_SSID_AVAIL: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">WL NO SSID AVAIL"); delay(2000); break; case WL_SCAN_COMPLETED: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">WL SCAN COMPLETED"); delay(2000); break; case WL_CONNECTED: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">> WL CONNECTED"); delay(2000); break; case WL_CONNECT_FAILED: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print(">WL CONNECT FAILED"); delay(2000); break; case WL_CONNECTION_LOST: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print("> WL CON FAIL"); delay(2000); break; case WL_DISCONNECTED: lcd.clear(); lcd.setCursor(0,0); lcd.print("WL/WAN STATUS"); lcd.setCursor(0,1); lcd.print("> WAN FAIL"); delay(2000); break; } if (includeSpace) { Serial.print("."); } } // REPORTING FUNCTION bool sendProbe(const char* host) { lcd.clear(); lcd.setCursor(0,0); lcd.print("SNDING PROBE TO>"); lcd.setCursor(0,1); lcd.print(host); delay(1000); bool success = false; for (int i = 0; i < pingProbeHost; ++i) { success |= probeOnce(host); } if (success) { lcd.clear(); lcd.setCursor(0,0); lcd.print("SRV/HST STATUS"); lcd.setCursor(0,1); lcd.print("> HOST IS UP"); delay(2000); } else { lcd.clear(); lcd.setCursor(0,0); lcd.print("SRV/HST STATUS"); lcd.setCursor(0,1); lcd.print("> HOST IS DOWN"); delay(2000); } return success; } // PING ONES FUNCTION bool probeOnce(const char* host) { bool success = Ping.ping(host); if (success) { lcd.clear(); lcd.setCursor(0,0); lcd.print("SND PING2HOST"); lcd.setCursor(0,1); lcd.print(">> REPLY-RCV"); delay(2000); } else { lcd.clear(); lcd.setCursor(0,0); lcd.print("SND PING2HOST"); lcd.setCursor(0,1); lcd.print(">>> NOREPLY"); delay(2000); } return success; } |
Downloads
Download LCD Screen 16×2 | 20×4 i2c Display Code Libraries | Zip
Monitor your Networked Servers / Routers with ESP8266 / NodeMCU as Stand-alone Wirelessly
