EC-M11-EG-C3-B95 – USER GUIDE

Programming  #

The NORVI EC-M11-EG-C3-B95 has a mini USB port for serial connection with the SoC for programming. Any ESP32-supported programming IDE can be used to program the controller. Follow this Guide to programming NORVI ESP32 controllers with the Arduino IDE.

SoC: ESP32-WROOM32
Programming Port: USB UART

8-pin Connector and wire harness #

Pin Description #

Load Cell Inputs #

Programming Load Cell Inputs #

#include "HX711.h"
const int LOADCELL_DOUT_PIN = 33;
const int LOADCELL_SCK_PIN = 32;
HX711 scale;

void setup() {
  Serial.begin(115200);
  Serial.println("HX711 Demo");
  Serial.println("Initializing the scale");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(2280.f);                      
  // this value is obtained by calibrating the scale with known weights; 
  //see the README for details
  scale.tare();                // reset the scale to 0
  Serial.println("After setting up the scale:");
  Serial.print("read: \t\t");
  Serial.println(scale.read());                 
  // print a raw reading from the ADC
  Serial.print("read average: \t\t");
  Serial.println(scale.read_average(20));       
  // print the average of 20 readings from the ADC
  Serial.print("get value: \t\t");
  Serial.println(scale.get_value(5));   
  // print the average of 5 readings from the ADC minus the tare weight, 
  //set with tare()
  Serial.print("get units: \t\t");
  Serial.println(scale.get_units(5), 1);        
  // print the average of 5 readings from the ADC minus tare weight, divided
  Serial.println("Readings:");
}

void loop() {
  Serial.print("one reading:\t");
  Serial.print(scale.get_units(), 1);
  Serial.print("\t| average:\t");
  Serial.println(scale.get_units(10), 1);
}

RS-485 Communication #

Programming RS-485 #

NORVI EC-M11-EG series RS-485 connection uses a half-duplex mode of MAX485 transmitter with UART
Communication.

#define RS485_FC 13
void setup() { 
   Serial.begin(115200); 
   Serial.println("Device Starting"); 
   pinMode(RS485_FC, OUTPUT); 
} 
void loop() { 
  digitalWrite(RS485_FC, HIGH); // Turns on Transmitter Mode            
  Serial.println("RS-485 Sending");  
  delay(500); 
}

NB-IoT Module #

Programming NB-IoT #

const int GSM_RST = 17;        // Define the pin for modem reset
const int GSM_PWR_KEY = 22;    // Define the pin for modem power key
const int MODEM_RX = 25;      // Define the pin for ESP32's RX to modem's TX
const int MODEM_TX = 26;      // Define the pin for ESP32's TX to modem's RX

void setup() {
  pinMode(GSM_RST, OUTPUT);
  pinMode(GSM_PWR_KEY, OUTPUT);
  digitalWrite(GSM_PWR_KEY, HIGH);  // Set modem to flight mode
  digitalWrite(GSM_RST, HIGH);
  delay(1000);
  digitalWrite(GSM_RST, LOW);
  delay(1000);
  digitalWrite(GSM_RST, HIGH);
  delay(1000);
  Serial.begin(9600);  // Initialize the serial monitor
  Serial2.begin(9600, SERIAL_8N1, MODEM_RX, MODEM_TX);  
  // Initialize communication with modem
  Serial.println("SIM AT START >>>>>>>>>>>>>>");
  delay(2000);
  Serial.flush();
  Serial2.println("AT+NCONFIG=AUTOCONNECT,TRUE");
  delay(2000);
  while (Serial2.available()) {
    char response = Serial2.read();
    Serial.write(response);
  }
  Serial2.println("AT");
  delay(2000);
  while (Serial2.available()) {
    char response = Serial2.read();
    Serial.write(response);
  }
  Serial2.println("AT+CEREG?");
  delay(2000);
  while (Serial2.available()) {
    char response = Serial2.read();
    Serial.write(response);
  }
  Serial.flush(); 
}

void loop() {
  Serial.print(".");
  Serial2.println("AT");
  while (Serial2.available()) {
    char response = Serial2.read();
    Serial.write(response);
  }
  delay(5000);
  Serial2.println("AT+CEREG?");
  delay(2000);
  while (Serial2.available()) {
    char response = Serial2.read();
    Serial.write(response);
  }
}