The RYLR993_Lite is a low-power, long-range LoRa transceiver module manufactured by REYAX. It is designed for wireless communication in IoT applications, offering reliable data transmission over extended distances. Operating in the 433/868/915 MHz frequency bands, the RYLR993_Lite supports multiple data rates, making it ideal for applications such as remote sensing, industrial automation, smart agriculture, and home automation.
This circuit features an ESP8266 NodeMCU microcontroller connected to a 0.96" OLED display and an RYLR896 LoRa module. The ESP8266 communicates with the OLED via I2C protocol and interfaces with the LoRa module using UART, enabling wireless data transmission and display capabilities.
Open Project in Cirkit Designer
This circuit features an Arduino UNO R4 WiFi microcontroller connected to an I2C LCD 16x2 Screen for display purposes and a photocell (LDR) with a 220 Ohm resistor forming a voltage divider for light sensing. The Arduino is programmed to interact with these components, likely to display light intensity readings on the LCD. The I2C communication protocol is used between the Arduino and the LCD screen, while the LDR's analog voltage is read through the Arduino's A0 pin.
Open Project in Cirkit Designer
This circuit features a LilyGo-SIM7000G module for cellular communication and GPS functionality, interfaced with an RTC DS3231 for real-time clock capabilities. It includes voltage sensing through two voltage sensor modules, and uses an 8-channel opto-coupler for isolating different parts of the circuit. Power management is handled by a buck converter connected to a DC power source and batteries, with a fuse for protection and a rocker switch for on/off control. Additionally, there's an LED for indication purposes.
Open Project in Cirkit Designer
This circuit features an Arduino Uno R3 as the central controller, interfaced with a KY-008 Laser Emitter, an LDR module, a buzzer, a Sim800l GSM module, and an MPU-6050 accelerometer/gyroscope. The Arduino controls the laser emitter and buzzer, reads analog values from the LDR, communicates with the Sim800l via serial (RX/TX), and interfaces with the MPU-6050 over I2C (SCL/SDA). The circuit is likely designed for sensing light intensity, motion detection, and communication via GSM, with the capability to emit laser light and sound alerts.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Frequency Bands | 433 MHz / 868 MHz / 915 MHz |
| Modulation Technique | LoRa (Long Range) |
| Communication Range | Up to 15 km (line of sight) |
| Data Rate | 0.3 kbps to 37.5 kbps |
| Operating Voltage | 2.8V to 3.6V |
| Operating Current | 10 mA (transmit), 0.1 µA (sleep mode) |
| Interface | UART (Universal Asynchronous Receiver-Transmitter) |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 18 mm x 25 mm x 3 mm |
The RYLR993_Lite module has a total of 8 pins. Below is the pinout and description:
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VCC | Power supply input (2.8V to 3.6V) |
| 2 | GND | Ground |
| 3 | TXD | UART Transmit (data output) |
| 4 | RXD | UART Receive (data input) |
| 5 | RESET | Module reset (active low) |
| 6 | WAKE | Wake-up pin for sleep mode |
| 7 | ANT | Antenna connection |
| 8 | NC | Not connected |
Below is an example of how to use the RYLR993_Lite with an Arduino UNO for basic communication:
| RYLR993_Lite Pin | Arduino UNO Pin |
|---|---|
| VCC | 3.3V |
| GND | GND |
| TXD | Pin 10 (RX) |
| RXD | Pin 11 (TX) |
| RESET | Digital Pin 9 |
#include <SoftwareSerial.h>
// Define RX and TX pins for SoftwareSerial
SoftwareSerial loraSerial(10, 11); // RX = Pin 10, TX = Pin 11
void setup() {
// Initialize serial communication
Serial.begin(9600); // For debugging via Serial Monitor
loraSerial.begin(9600); // For communication with RYLR993_Lite
// Send initialization command to the module
loraSerial.println("AT+ADDRESS=1"); // Set device address to 1
delay(100);
loraSerial.println("AT+NETWORKID=5"); // Set network ID to 5
delay(100);
loraSerial.println("AT+BAND=915000000"); // Set frequency to 915 MHz
delay(100);
Serial.println("RYLR993_Lite initialized.");
}
void loop() {
// Check for incoming data from the module
if (loraSerial.available()) {
String data = loraSerial.readString();
Serial.println("Received: " + data); // Print received data
}
// Send data to the module
if (Serial.available()) {
String command = Serial.readString();
loraSerial.println(command); // Send command to RYLR993_Lite
}
}
No Response from the Module
Limited Communication Range
Module Not Powering On
Data Loss or Corruption
Q: Can the RYLR993_Lite operate on 5V?
A: No, the module requires a power supply of 2.8V to 3.6V. Use a voltage regulator if needed.
Q: What is the maximum communication range?
A: The module can achieve up to 15 km in line-of-sight conditions. Obstacles and interference may reduce this range.
Q: How do I reset the module?
A: Pull the RESET pin low for at least 100 ms and then release it.
Q: Can I use the module with other microcontrollers?
A: Yes, the RYLR993_Lite can be used with any microcontroller that supports UART communication.
This concludes the documentation for the RYLR993_Lite. For further assistance, refer to the official datasheet or contact REYAX support.