Precise details:

Update information:

Note: After the product is updated, the Bluetooth has been built-in ESP32 chip, and the user only needs to burn the Bluetooth program to use the Bluetooth function.

Product Description:

Pin reference description:

For more product information, click https://drive.google.com/file/d/1L8ll-DeAC2SATBZn0-KbSaZsrinbnXkF/view

Test details:

Click links for more details: https://eyun.baidu.com/s/3hsiTNgg

Note:This product does not include the battery.

Package included:

2 x ESP32 OLED
2 x Line
4 x pin
2 x 433m Spring Antenna

For example One:

(1) LoRaSender
#include
#include
#include
// GPIO5  -- SX1278's SCK
// GPIO19 -- SX1278's MISO
// GPIO27 -- SX1278's M0SI
// GPIO18 -- SX1278's CS
// GPIO14 -- SX1278's RESET
// GPIO26 -- SX1278's IRQ(Interrupt Request)
 
#define SS      18
#define RST     14
#define DI0     26
#define BAND    433E6  
int counter = 0;
 
void setup() {
  pinMode(25,OUTPUT); //Send success, LED will bright 1 second
  
  Serial.begin(115200);
  while (!Serial); //If just the the basic function, must connect to a computer
  
  SPI.begin(5,19,27,18);
  LoRa.setPins(SS,RST,DI0);
//  Serial.println("LoRa Sender");
 
  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  Serial.println("LoRa Initial OK!");
}
 
void loop() {
  Serial.print("Sending packet: ");
  Serial.println(counter);
 
  // send packet
  LoRa.beginPacket();
  LoRa.print("hello ");
  LoRa.print(counter);
  LoRa.endPacket();
 
  counter++;
  digitalWrite(25, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(25, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
  
  delay(3000);
}
 
For example Two
(2)LoRaReceiver
#include
#include
 
 
// GPIO5  -- SX1278's SCK
// GPIO19 -- SX1278's MISO
// GPIO27 -- SX1278's M0SI
// GPIO18 -- SX1278's CS
// GPIO14 -- SX1278's RESET
// GPIO26 -- SX1278's IRQ(Interrupt Request)
 
#define SS      18
#define RST     14
#define DI0     26
#define BAND    433E6
 
void setup() {
  Serial.begin(115200);
  while (!Serial); //if just the the basic function, must connect to a computer
  delay(1000);
  
  Serial.println("LoRa Receiver");
  
  SPI.begin(5,19,27,18);
  LoRa.setPins(SS,RST,DI0);
  
  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
}
 
void loop() {
  // try to parse packet
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
// received a packet
    Serial.print("Received packet '");
 
    // read packet
    while (LoRa.available()) {
      Serial.print((char)LoRa.read());
    }
 
    // print RSSI of packet
    Serial.print("' with RSSI ");
    Serial.println(LoRa.packetRssi());
  }
}
 
For example three
(3)LoRaReceiverCallback
#include
#include
 
 
 
// GPIO5  -- SX1278's SCK
// GPIO19 -- SX1278's MISO
// GPIO27 -- SX1278's M0SI
// GPIO18 -- SX1278's CS
// GPIO14 -- SX1278's RESET
// GPIO26 -- SX1278's IRQ(Interrupt Request)
 
#define SS      18
#define RST     14
#define DI0     26
#define BAND    433E6
 
void setup() {
  Serial.begin(115200);
  while (!Serial); //if just the the basic function, must connect to a computer
 
  SPI.begin(5,19,27,18);
  LoRa.setPins(SS,RST,DI0);
  
  Serial.println("LoRa Receiver Callback");
 
  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
 }
 
  // register the receive callback
  LoRa.onReceive(onReceive);
 
  // put the radio into receive mode
  LoRa.receive();
}
 
void loop() {
  // do nothing
}
 
void onReceive(int packetSize) {
  // received a packet
  Serial.print("Received packet '");
 
  // read packet
  for (int i = 0; i < packetSize; i++) {
    Serial.print((char)LoRa.read());
  }
 
  // print RSSI of packet
  Serial.print("' with RSSI ");
  Serial.println(LoRa.packetRssi());
}
?
For example four
#include  // Only needed for 1.6.5 and earlier
#include "SSD1306.h" // alias for `#include "SSD1306Wire.h"`
#include "images.h"
 
//OLED pins to ESP32 0.96OLEDGPIOs via this connecthin:
//OLED_SDA -- GPIO4
//OLED_SCL -- GPIO15
//OLED_RST -- GPIO16
 
SSD1306  display(0x3c, 4, 15);
 
#define DEMO_DURATION 3000
typedef void (*Demo)(void);
int demoMode = 0;
int counter = 1;
 
void setup() {
  pinMode(16,OUTPUT);
  digitalWrite(16, LOW);    // set GPIO16 low to reset OLED
  delay(50);
  digitalWrite(16, HIGH); // while OLED is running, must set GPIO16 in high
  
  Serial.begin(115200);
  Serial.println();
  Serial.println();
 
 
  // Initialising the UI will init the display too.
  display.init();
 
  display.flipScreenVertically();
  display.setFont(ArialMT_Plain_10);
 
}
 
void drawFontFaceDemo() {
    // Font Demo1
    // create more fonts at http://oleddisplay.squix.ch/
    display.setTextAlignment(TEXT_ALIGN_LEFT);
    display.setFont(ArialMT_Plain_10);
    display.drawString(0, 0, "Hello world");
    display.setFont(ArialMT_Plain_16);
    display.drawString(0, 10, "Hello world");
    display.setFont(ArialMT_Plain_24);
    display.drawString(0, 26, "Hello world");
}
 
void drawTextFlowDemo() {
    display.setFont(ArialMT_Plain_10);
    display.setTextAlignment(TEXT_ALIGN_LEFT);
    display.drawStringMaxWidth(0, 0, 128,
      "Lorem ipsumn dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore." );
}
 
void drawTextAlignmentDemo() {
    // Text alignment demo
display.setFont(ArialMT_Plain_10);
 
  // The coordinates define the left starting point of the text
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.drawString(0, 10, "Left aligned (0,10)");
 
  // The coordinates define the center of the text
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  display.drawString(64, 22, "Center aligned (64,22)");
 
  // The coordinates define the right end of the text
  display.setTextAlignment(TEXT_ALIGN_RIGHT);
  display.drawString(128, 33, "Right aligned (128,33)");
}
 
void drawRectDemo() {
      // Draw a pixel at given position
    for (int i = 0; i < 10; i++) {
      display.setPixel(i, i);
      display.setPixel(10 - i, i);
    }
    display.drawRect(12, 12, 20, 20);
 
    // Fill the rectangle
    display.fillRect(14, 14, 17, 17);
 
    // Draw a line horizontally
    display.drawHorizontalLine(0, 40, 20);
 
    // Draw a line horizontally
    display.drawVerticalLine(40, 0, 20);
}
 
void drawCircleDemo() {
  for (int i=1; i < 8; i++) {
    display.setColor(WHITE);
    display.drawCircle(32, 32, i*3);
    if (i % 2 == 0) {
      display.setColor(BLACK);
    }
    display.fillCircle(96, 32, 32 - i* 3);
  }
}
void drawProgressBarDemo() {
  int progress = (counter / 5) % 100;
  // draw the progress bar
  display.drawProgressBar(0, 32, 120, 10, progress);
 
  // draw the percentage as String
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  display.drawString(64, 15, String(progress) + "%");
}
 
void drawImageDemo() {
    // see http://blog.squix.org/2015/05/esp8266-nodemcu-how-to-create-xbm.html
    // on how to create xbm files
    display.drawXbm(34, 14, WiFi_Logo_width, WiFi_Logo_height, WiFi_Logo_bits);
}
 
Demo demos[] = {drawFontFaceDemo, drawTextFlowDemo, drawTextAlignmentDemo, drawRectDemo, drawCircleDemo, drawProgressBarDemo, drawImageDemo};
int demoLength = (sizeof(demos) / sizeof(Demo));
long timeSinceLastModeSwitch = 0;
 
void loop() {
  // clear the display
  display.clear();
  // draw the current demo method
  demos[demoMode]();
 
  display.setTextAlignment(TEXT_ALIGN_RIGHT);
  display.drawString(10, 128, String(millis()));
  // write the buffer to the display
  display.display();
 
  if (millis() - timeSinceLastModeSwitch > DEMO_DURATION) {
    demoMode = (demoMode + 1)  % demoLength;
    timeSinceLastModeSwitch = millis();
  }
  counter++;
  delay(10);
}