--- title: LTE Evaluation Board Series B description: "## Basic Overview LTE Evaluation Board Series B is designed to evaluate LTE modules and with its help you can access various features of the module. In the evaluation boards, we have tried to make all the capabilities of the…" url: "https://eicut.com/wiki/iot-communication/4g-lte/lte-evaluation-board-series-b/" updated: "2026-02-15" category: IoT / Communication / 4G / LTE --- # LTE Evaluation Board Series B ## Basic Overview LTE Evaluation Board Series B is designed to evaluate LTE modules and with its help you can access various features of the module. In the evaluation boards, we have tried to make all the capabilities of the module available and you can easily perform your tests with the help of this board. ## Supported Module List - EG915U ## Evaluation Board Resources ### Function Description The main component and interface placement of the evaluation board is shown in the following figure: ![Top view EICUT LTE Evaluation Board Series B ](https://eicut.com/wp-content/uploads/2025/11/image1_11zon-2-1-1024x635.webp) **Top view** ### Evaluation Board Interfaces The main pin placement of the evaluation board is shown in the following figure: ![LTE Evaluation Board Series B pinout diagram](https://eicut.com/wp-content/uploads/2025/11/image3_11zon-3.webp) **Pinout reference**   | NO. | Name | Silkscreen | Comment | | --- | --- | --- | --- | | **1** | SIM Card Slot 1 | SIM1 | Nano-SIM | | **2** | SIM Card Slot 2 | SIM2 | Nano-SIM | | **3** | PWR KEY Button | PWR | Turn-on button | | **4** | RST Button | RESET | Reset button | | **5** | BOOT Button | BOOT | Firmware burning button | | **6** | LTE Antenna | MAIN ANT | UFL ANTENNA connector | | **7** | GNSS Antenna | GNSS ANT | UFL ANTENNA connector | | **8** | DIV/WIFI/BT | WIFI_S/BT ANT | DIV / Wi-Fi / Bluetooth UFL ANTENNA connector | **The evaluation board has 3 functional indication LEDs, as follows:** - **STATUS**: Indicates the module’s operation status. - **NET STA**: Indicates the module’s network activity status. - **PSM IND**: Module Pin 1, PSM indication LED. ### PIN Header | NO. | Name | Function | NO. | Name | Function | | --- | --- | --- | --- | --- | --- | | **1** | 5V | 5V Output | **2** | GND | Ground | | **3** | GND | Ground | **4** | ADC0 | ADC0 testing interface | | **5** | A RX | AUX UART Recv | **6** | GND | Ground | | **7** | A TX | AUX UART Send | **8** | P CL | PCM clock | | **9** | GND | Ground | **10** | P SY | PCM data frame sync | | **11** | RX | MAIN UART Recv | **12** | P DI | PCM data input | | **13** | TX | MAIN UART Send | **14** | P DO | PCM data output | | **15** | GND | Ground | **16** | GND | Ground | | **17** | D TX | Debug UART Send | **18** | SDA | I2C1 Data | | **19** | D RX | Debug UART Recv | **20** | SCL | I2C1 Clock | ### Evaluation Board Dimensions ![EICUT LTE Evaluation Board Series B dimension diagram](https://eicut.com/wp-content/uploads/2025/11/image2_11zon-2-1.webp) **Mechanical drawing of the EICUT LTE EVB Series B : 78mm × 58mm** ## Getting Started Preparation **Step 1**: Install Qnavigator software. 🔗**Download QNavigator** [**Download QNavigator from Quectel**](https://www.quectel.com/download/qnavigator_v1-5/) After downloading QNavigator, open it and continue the software tutorial by clicking Next **Step 2**: After installation Act like a software wizard. **Step 3**: Connect the Evaluation Board by USB to the computer. **Step 4**: select your board in the port section, set the baudrate to 115200, and click Connect. **Step 5**: Click on the gear and see if the module is connected. **Step 6**: By entering AT Command, you can use different parts of the module. 🔗**Hint**  Make sure the power supply voltage is stable. The board will power up and turn on automatically as soon as power is applied — there is no separate power-off switch required. ## Downloads - [EG915U-EU Quectel Evaluation Board Schematic V1.1](https://eicut.com/wp-content/uploads/2025/09/EB_EG915_Schematic_V1.1.pdf) - [Quectel_EG915U_Series_Hardware_Design_V1.0](https://eicut.com/wp-content/uploads/2025/09/Quectel_EG915U_Series_Hardware_Design_V1.0.pdf) - [Quectel_EG915U_Series_Reference_Design_V1.0](https://eicut.com/wp-content/uploads/2025/09/Quectel_EG915U_Series_Reference_Design_V1.0.pdf) - [Quectel_EC200UEG915U_Series_AT_Commands_Manual_V1.0](https://eicut.com/wp-content/uploads/2025/09/Quectel_EC200UEG915U_Series_AT_Commands_Manual_V1.0.pdf) - [Quectel_EG915U_Series_LTE_Standard_Specification_Preliminary_V1.2](https://eicut.com/wp-content/uploads/2025/09/Quectel_EG915U_Series_LTE_Standard_Specification_Preliminary_V1.2.pdf) ## FAQ What is the EG915U-EU Evaluation Board? A full-featured, compact evaluation board for the **Quectel EG915U-EU** LTE Cat.1 module — supports Europe/Africa/Middle East bands, dual nano-SIM, GNSS, Wi-Fi/BT scan, and voice over LTE (VoLTE). Does it have dual SIM support? Yes — two independent **nano-SIM (4FF)** slots on the board. Switch between them using AT+CUSIM command. How do I turn the module on? Just connect the **USB-C cable** → the board powers automatically. Press the **PWRKEY button** for ~2 seconds to turn the module on (STATUS LED will light up). How do I communicate with the module? Connect via USB-C → multiple COM ports appear: • Highest-numbered port = **Main AT port** (115200 bps default) • Lower ports = Debug / GNSS NMEA / Modem ports Main UART (TX/RX) and Debug UART (D TX/D RX) are also broken out on the 20-pin header. Does it support GNSS? Yes — integrated GPS/BeiDou/GLONASS/Galileo/QZSS with dedicated **GNSS U.FL connector** for active antenna. Is Wi-Fi / Bluetooth available? EG915U supports **Wi-Fi scan** and **Bluetooth scan** (passive). A shared **DIV/Wi-Fi/BT U.FL connector** is provided for external antenna. What do the three LEDs indicate? • **STATUS**: Module powered & running • **NET STA**: Network registration & activity • **PSM IND**: Deep-sleep / power-saving mode active How to enter firmware download (USB_BOOT) mode? Hold the **BOOT button** while pressing **PWRKEY** (or plug in USB while BOOT is pressed) → module enters DFU mode for QFlash/QWinLog tool. Can I use the board with an external MCU? Yes — full 20-pin header provides: • Main UART, Debug UART, AUX UART • PCM digital audio (for VoLTE) • I²C, ADC, 5 V output, multiple GNDs What are the board dimensions? **78 × 58 mm** — compact and easy to integrate into prototypes or test jigs. [![EG915U-EU Quectel Evaluation Board Supporting LTE Cat 1/GSM/GPRS/Wi-Fi Scan/Bluetooth](https://eicut.com/wp-content/uploads/2025/11/Frame-44_11zon-273x300.webp)](https://eicut.com/product/eg915u-eu-quectel-evaluation-board/)