USER GUIDE

Programming #

The NORVI GSM-AE02-I-G 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

Digital Inputs  #

Wiring Digital Inputs #

The digital inputs of NORVI GSM-AE02-I-G can be configured as both Sink and Source connections. The inverse of the Digital Input polarity should be supplied to the common terminal.

Programming Digital Inputs  #

Reading the relevant GPIO of the ESP32 gives the value of the Digital Input. When the inputs are in the OFF state, the GPIO goes HIGH, and when the input is in the ON stage, the GPIO goes LOW. Refer to the GPIO allocation table in the datasheet for the digital input GPIO.

#define INPUT1 35 
void setup() { 
   Serial.begin(115200); 
   Serial.println("Device Starting"); 

   pinMode(INPUT1, INPUT); 
} 
void loop() { 
   Serial.print(digitalRead(INPUT1));
   Serial.println(""); 
   delay(500); 
}

Analog Input  #

Wiring Analog Inputs #

Reading Analog Input  #

Reading the relevant I2C address of the ADC gives the value of the Analog Input.

Programming Analog Inputs  #

#include <Adafruit_ADS1X15.h> 
#include <Wire.h> 

Adafruit_ADS1115 ads1; 

void setup() { 
   Serial.begin(115200); 
   Serial.println("Device Starting"); 

   Wire.begin(16,17); 
   ads1.begin(0x48); 
   ads1.setGain(GAIN_ONE); 
} 

void loop() { 
Serial.print("Analog 0 ");Serial.println(ads1.readADC_SingleEnded(0));  delay(10); 
Serial.print("Analog 1 ");Serial.println(ads1.readADC_SingleEnded(1)); delay(10); 
Serial.print("Analog 2 ");Serial.println(ads1.readADC_SingleEnded(2)); delay(10); 
Serial.print("Analog 3 ");Serial.println(ads1.readADC_SingleEnded(3)); delay(10); 

Serial.println(""); 
delay(500); 
}

RS-485 communication #

RS-485 Wiring  #

Driver	MAX485
UART RX	GPIO25
UART TX	GPIO26
Flow Control	GPIO22

Programming RS-485 #

The UART Connections of RS-485 in the NORVI GSM-AE02 series are shared with the UART connections of USB Serial.

#define RS485_RX 25
#define RS485_TX 26
#define RS485_FC 22

void setup() {
  Serial.begin(115200);
  Serial1.begin(9600, SERIAL_8N1, RS485_RX, RS485_TX); 

  pinMode(RS485_FC, OUTPUT);
  digitalWrite(RS485_FC, HIGH);   // RS-485 
}

void loop() {
digitalWrite(RS485_FC, HIGH); // Turns on Transmitter Mode            
Serial.println("RS-485 Sending");  
   delay(500); 
}

Built-in OLED Display #

Display driver	SSD1306
Communication	I2C
Module Address	0x3C
Resolution	128 x 64

Refer to the GPIO allocation table in the datasheet for the I2C GPIO of the OLED Display.

Library supported by the Adafruit_SSD0306 Library.

Wire.begin (SDA, SCL); is required to initialize I2C on correct pins

Programming OLED Display  #

#include <SPI.h> 
#include <Wire.h> 
#include <Adafruit_GFX.h> 
#include <Adafruit_SSD1306.h> 

#define SCREEN_WIDTH 128 // OLED display width, in pixels 
#define SCREEN_HEIGHT 64 // OLED display height, in pixels 
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin) 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); 
void setup() { 
   Wire.begin(16,17); 
   if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
   // Address 0x3C for 128x64 
Serial.println(F("SSD1306 allocation failed")); 
      	for(;;); // Don't proceed, loop forever 
   } 
   display.display(); delay(2000); // Pause for 2 seconds 
} 	
void loop() { 
}

Built-in Buttons #

Read mode	ADC (Analog to Digital Conversion)
Analog IO	GPIO36

Programming Buttons #

#define buttonPin 36
int  buttonState = 0;

void setup() {
 
  Serial.begin(9600);                             
  pinMode(buttonPin,INPUT);
}
void loop() { 
  Serial.print("Button: ");
  buttonState = analogRead(buttonPin);
  delay(50);
  Serial.print(analogRead(buttonPin));
  Serial.print("\tAnalog: ");
  delay(1000);
}

GSM Communication #

Model of GSM Modem	SIM800C
FCC ID	UDU-SIM800C
TAC	86610402
RXD	GPIO32
TXD	GPIO33

Programming GSM Communication #

#define GSM_RX 33
#define GSM_TX 32
#define GSM_RESET 21
unsigned long int timer1 = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello");
  Serial2.begin(115200, SERIAL_8N1, GSM_RX, GSM_TX); 
  pinMode(GSM_RESET, OUTPUT);
  digitalWrite(GSM_RESET, HIGH);   // RS-485 
  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);
    }
  }
  timer1 = millis();
  Serial2.println("AT+CFUN?");
  while(millis()<timer1+10000){
    while (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.write(inByte);
    }
  }
  Serial.println("AT TIMEOUT");
}

void loop() {
    while (Serial.available()) {
    int inByte = Serial.read();
    Serial2.write(inByte);
  }
  while (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.write(inByte);
  }

  // put your main code here, to run repeatedly:

}