The **RA-07-R-T** is a wireless communication module developed by **Ai-Thinker**. It is based on the **Semtech SX1262** transceiver and is designed for Long Range (LoRa) applications, specifically utilizing the **LoRaWAN** protocol. --- ### ## Technical Specifications Below are the primary electronic characteristics of the RA-07-R-T module: | Feature | Specification | | :--- | :--- | | **Chipset** | Semtech SX1262 + STM32 Series MCU | | **Frequency Range** | 410MHz ~ 525MHz (standard) | | **Protocol** | LoRaWAN / LoRa (Point-to-Point) | | **Interface** | UART (AT Command Set) | | **Operating Voltage** | 3.3V (Typical) | | **Transmit Power** | Up to +22dBm | | **Sensitivity** | -148dBm (at SF12 / 125KHz) | | **Package** | SMT (Surface Mount Technology) | --- ### ### Core Electronic Components The module integrates several critical parts within its compact shielding: 1. **The SX1262 Transceiver:** The heart of the module, responsible for the Physical Layer (PHY). It provides high sensitivity and high power efficiency compared to older SX127x series chips. 2. **Integrated MCU:** Unlike simple LoRa transceivers, the "R" series includes an onboard microcontroller. This MCU runs the LoRaWAN stack and handles **AT Commands**, allowing you to control the module via simple serial strings. 3. **TCXO (Temperature Compensated Crystal Oscillator):** The "-T" in the part number usually indicates a TCXO. This ensures frequency stability even during extreme temperature fluctuations, which is critical for narrow-band long-range communication. 4. **RF Front-End:** Includes an antenna switch and matching circuit optimized for the 433/470 MHz bands. --- ### ### Pinout and Connectivity The module typically interfaces with a host controller (like an Arduino, ESP32, or Raspberry Pi) via the following pins: * **VCC/GND:** Power supply (3.3V). * **UART_TX / UART_RX:** For sending and receiving AT commands. * **RESET:** To hardware reset the module. * **ANT:** Pin or IPEX connector for the external antenna. --- ### ### Key Advantages * **Ease of Use:** Because it supports AT commands, you do not need to write complex LoRaWAN timing code; you simply send `AT+JOIN` to connect to a gateway. * **Low Power Consumption:** Designed for battery-operated IoT sensors, featuring deep sleep modes in the micro-ampere range. * **Stability:** The TCXO makes it suitable for industrial outdoor environments.