EC-M11-BC-C3-LTE – USER GUIDE

Programming  #

The NORVI EC-M11-BC-C3-LTE 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-based controllers with the Arduino IDE.

SoC: ESP32-WROOM32
Programming Port: USB UART

Wiring Load Cell Input and Solar. #

8-pin and 3-pin connectors and wire harness #

Pin Description #

8P Male	Wire color	I/O Configuration
1	White	A+
2	Brown	A-
3	Green	B+
4	Yellow	B-
5	Gray	–
6	Pink	–
7	Blue	–
8	Red	–

3P Male	Wire color	I/O Configuration
1	Blue	Solar Panel +
2	Black	Not in Use
3	Brown	Solar Panel –

Load Cell Inputs #

Programming Load Cell Inputs  #

Number of Load Cell Inputs	1
Module Type	HX711
PD SCK	GPIO12
DOUT	GPIO13

#include "HX711.h"
const int LOADCELL_DOUT_PIN = 13;
const int LOADCELL_SCK_PIN = 12;
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);
}

LTE1 Communication #

Model of LTE Modem	SIM7000-E
FCC ID	2AJYU-SIM7000
TAC	86615402
RXD	GPIO25
TXD	GPIO26
RESET	GPIO27
POWER	GPIO32

LTE2 Communication #

Model of LTE Modem	SIM7500
FCC ID	2AQ9M-SIM7500
TAC	86147503
RXD	GPIO25
TXD	GPIO26
RESET	GPIO27
POWER	GPIO32

Programming LTE Communication #

#define MODEM_RESET 27
#define MODEM_FLIGHT 32
#define MODEM_RX 26
#define MODEM_TX 25
long timer1;

void setup() {           // initialize both serial ports:
  Serial.begin(115200);
  pinMode(MODEM_FLIGHT , OUTPUT);       // FLIGHT MODE ENABLE
  pinMode(MODEM_RESET , OUTPUT);       // MODEM RESET PIN
  digitalWrite(MODEM_FLIGHT, HIGH);   // FLIGHT MODE 
  MODEM_RESET_CYC();
  delay(2000);
  Serial2.begin(115200, SERIAL_8N1, MODEM_RX, MODEM_TX);
  Serial.println("SIM AT ATART >>>>>>>>>>>>>>");
  delay(2000);
  Serial2.println("AT");
  delay(2000);
  Serial2.println("AT+CPIN?");
  delay(2000);
  Serial2.println("AT+CNMP?");
}

void loop() {
  delay(3000);
  timer1 = millis();
  Serial2.println("AT");
  while(millis()<timer1+10000){
    while (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.write(inByte);
    }
  }
  timer1 = millis();
  Serial2.println("AT+CPIN?");
  while(millis()<timer1+10000){
    while (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.write(inByte);
    }
  }
  Serial.println("AT SCAN DONE");         // read from port 0, send to port 1:
  while (Serial.available()) {
    int inByte = Serial.read();
    Serial2.write(inByte);
  }
  while (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.write(inByte);
  }
}

void MODEM_RESET_CYC() {
  digitalWrite(MODEM_RESET,HIGH );
  delay(1000);
  digitalWrite(MODEM_RESET,LOW );
  delay(1000);
  digitalWrite(MODEM_RESET, HIGH);
}

Solar Input #

Solar Powered Model	CN3083
Maximum Charge Current	600mA
Maximum Voltage	6V
Input Voltage monitor	ADS1115 – 0x49 – AIN2

Battery Input #

Battery Type	103040 Lithium polymer battery
Nominal Capacity	1200mAh
Nominal Voltage	3.75V
Overcharge	4.2V
Over-discharge Cutoff Voltage	3V

Programming Solar and Battery #

#include <Adafruit_SSD1306.h>
#include <Adafruit_ADS1X15.h>
Adafruit_ADS1115 ads1;
int analog_value = 0;

void setup() {
  Serial.begin(115200);// put your setup code here, to run once:
  Wire.begin(16,17);
  if (!ads1.begin(0x49)) {
    Serial.println("Failed to initialize ADS 1 .");
    while (1);
  }
}

void loop() {
  int16_t adc0, adc1, adc2, adc3;
  adc0 = ads1.readADC_SingleEnded(0);
  adc1 = ads1.readADC_SingleEnded(1);
  adc2 = ads1.readADC_SingleEnded(2);
  adc3 = ads1.readADC_SingleEnded(3);
  Serial.println("-----------------------------------------------------------");
  Serial.print("AIN1: "); 
  Serial.print(adc0); 
  Serial.println("  ");
  Serial.print("AIN2: "); 
  Serial.print(adc1); 
  Serial.println("  ");
  Serial.print("SOLAR: "); 
  Serial.print(adc2); 
  Serial.println("  ");
  Serial.print("AIN4: "); 
  Serial.print(adc3); 
  Serial.println("  ");   
}