WT99C262-SG3 Feature Introduction

1. Introduction

The WT99C262-SG series development board is a development board launched by Shenzhen Wireless-tag Co., Ltd., based on the WTLRC262-SG series module. The onboard module supports Wi-Fi + BLE + LoRa functionality, and most of the module's pins are brought out to pin headers on both sides. Developers can connect various peripherals via jumpers according to actual needs, or use the development board on a breadboard. Additionally, the WT99C262-SG series development board can be paired with Wireless-tag's WT32-ETH series development boards to achieve LoRa/Wi-Fi/BLE to Ethernet functionality.

1.1 🔧 Core Hardware Configuration

• Communication Module: Onboard Wireless-tag's self-developed WTLRC262-SG series module, integrating three major wireless communication protocols: Wi-Fi, BLE, and LoRa. It features long-range, low-power consumption, and high-connection capacity, suitable for various IoT scenarios.
• Pin Expansion: Most of the module's GPIOs are brought out to pin headers on both sides, facilitating users to connect peripherals via jumpers or directly plug the development board into a breadboard for rapid prototyping and debugging.
• Multi-Protocol Intercommunication: Can be used with Wireless-tag's WT32-ETH series Ethernet modules to build LoRa/Wi-Fi/BLE ↔ Ethernet gateways, enabling data passthrough and interconnection between various network protocols.
• Hardware Flexibility: The development board features a compact structure and rich interfaces, suitable for building wireless sensor networks, remote data acquisition, industrial edge nodes, and other application scenarios.

1.2 🛠️ Design Features

1. Combination of Wi-Fi + BLE + LoRa. Suitable for development in application scenarios such as industrial control.
2. Onboard programming chip: Uses CH342K USB to serial chip. Only a standard Type-C cable is needed for programming and debugging.
3. Can be paired with WT32-ETH to achieve communication with Ethernet.
4. Both antennas use IPEX external antenna connectors, facilitating the use of external antennas with better signal quality.
5. Reset buttons for both WTLRC262-SG and WT32-ETH are brought out, making development more convenient.

1.3 📡 Main Application Scenarios

• Smart Agriculture: LoRa supports long-range, low-power transmission, suitable for off-grid or wide-area environments; Wi-Fi/Ethernet can backhaul data to the cloud platform.
• Industrial IoT: Supports integration of multiple protocols; can quickly connect to existing Ethernet networks via WT32-ETH modules.
• LoRa to Ethernet Data Relay Gateway: Bridges edge nodes to central servers, suitable for smart water meters, electricity meters, manhole cover monitoring, etc. Ultra-low cost, high cost-effectiveness.
• Smart Buildings: Supports multi-protocol convergence; Wi-Fi or Ethernet methods can directly connect to local servers or building automation platforms.

1.4 ⚙️ Development Advantages

• Development using esp-idf, open-source official examples available for reference.
• More convenient development when paired with WT32-ETH.
• OTA Upgrade: Supports remote firmware updates, offering high maintenance convenience.

2. Pin Description

3. Power Characteristics

You can choose one of the following power supply methods for the WT99C262-SG series development board:

• External power supply via the USB Type-C interface;
• Use the 3V3 power input port and connect the corresponding voltage via Dupont wires;
• When used with the WT32-ETH series development board, it can be powered via the WT32-ETH series development board. (Currently supports WT32-ETH02, WT32-ETH02-PLUS);