☀️ LILYGO® SimShield Expansion Board is a powerful and flexible add‑on for the T‑SIM series development boards. It combines multi‑channel current detection, LoRa transceiver, wide‑range DC input, and multiple communication interfaces. With easy jumper and DIP switch configuration, developers can quickly set up power sources and expansion functions. Perfect for advanced IoT projects that demand stable power management and extended connectivity.
✨ Key Features
- ⚡ Wide Voltage Input: 7–36V DC input for versatile power options
- 🔋 Battery Interface: Supports 4.2V battery input, parallel connection with mainboard battery port
- 📊 Triple Current Detection: Track battery charge/discharge and external load currents
- 📡 LoRa Transceiver: Long‑range wireless communication capability
- 💾 SD Card Remapping: SD card must be inserted into SimShield when active
- 🔌 RS485 Interface: Auto send/receive control, recommended baud rate ≤115200
- 🖥️ I2C Interface: Works with 0.96‑inch OLED display
- 🛡️ Safety Note: Ensure jumper caps and DIP switches are set correctly to prevent damage
📐 Specifications
| Parameter | Specification |
|---|---|
| 🔋 DC Input Voltage | 7–36V |
| 🔋 Battery Input Voltage | Max 4.2V |
| ⚡ 5V Output Current | Up to 2A (DC input) |
| ⚡ 3.3V Output Current | Provided by mainboard, ≤100mA recommended |
| 📊 Current Detection Channels | CH1, CH2, CH3 (configurable) |
| 🔌 RS485 Communication Rate | ≤115200 |
| 🖥️ Supported Modules | SIM7000G, A7670X, A7608X, SIM7600X, SIM7670G, SIM7080G |
| 🔧 Interfaces | DC, VBAT, Current Detection, SD, RS485, I2C, SPI |
🛠️ Tech Support
| ℹ️ Product information 💻 Technical support |
🌍 Applications
- 📡 Remote Communication: 4G + LoRa dual‑mode connectivity with SIM modules
- 🌱 Environmental Monitoring: Solar and battery powered, ideal for outdoor deployments
- 🏭 Industrial IoT: RS485 interface for sensors and industrial devices
- 🔋 Energy Management: Real‑time monitoring of battery charge/discharge currents
- 🚜 Smart Agriculture: Collect and transmit field data via LoRa/4G