ESP8266 UDP broadcast receiver /* Wireless Serial using UDP ESP8266 Hardware: NodeMCU Circuits4you.com 2018 UDP Broadcast multi esp to esp communication */ #include <Wire.h> // Enable this line if using Arduino Uno, Mega, etc. #include “Adafruit_LEDBackpack.h” #include “Adafruit_GFX.h” Adafruit_7segment matrix = Adafruit_7segment(); #include <ESP8266WiFi.h> #include <WiFiUdp.h> const char *ssid = “KMTRONIC”; const . . .
ESP8266: Adafruit VEML6070 I2C Test Connection: – NodeMCU GPIO0 -> D1 -> SCL (VEML6070) – NodeMCU GPIO4 -> D2 -> SDA (VEML6070) – NodeMCU +3.3 -> 3V3 -> VCC (VEML6070) – NodeMCU GND -> GND -> GND (VEML6070) Arduino code: #include <Wire.h> #include “Adafruit_VEML6070.h” Adafruit_VEML6070 uv = Adafruit_VEML6070(); void setup() { Serial.begin(9600); Serial.println(“VEML6070 Test”); . . .
ESP8266: HT-16k33 7 Segment I2C Test Connection: – NodeMCU GPIO0 -> D1 -> SCL (HT-16k33) – NodeMCU GPIO4 -> D2 -> SDA (HT-16k33) – NodeMCU +3.3 -> 3V3 -> VCC (HT-16k33) – NodeMCU GND -> GND -> GND (HT-16k33) Library: https://github.com/adafruit/Adafruit_LED_Backpack Arduino code: /*************************************************** This is a library for our . . .
Yet Another Arduino Wiegand Library #define PIN_D0 D1 #define PIN_D1 D2 // The object that handles the wiegand protocol Wiegand wiegand; // Initialize Wiegand reader void setup() { Serial.begin(9600); delay(1); Serial.println(“Start…”); //Install listeners and initialize Wiegand reader wiegand.onReceive(receivedData, “Card readed: “); wiegand.onStateChange(stateChanged, “State changed: “); wiegand.begin(WIEGAND_LENGTH_AUTO); //initialize pins as INPUT pinMode(PIN_D0, INPUT); . . .
http://en.trialcommand.com/blog/esp8266-slave-modbus-tcpip-no-libraries/ /* * More Tutorials: * Website http://trialcommand.com * In English: http://en.trialcommand.com * En Español: http://en.trialcommand.com */ #include <ESP8266WiFi.h> const char* ssid = “KMTRONIC”; const char* password = “12345678”; // RS485 Control pin const int RS485_control = D0; // Receive buffer long Buffer[9]; int VoltageReadCommand[] ={0x01, 0x04, 0x00, 0x00, 0x00, 0x02, 0x71, . . .
