1. Producte acabatview
The LILYGO T-Call A7670E is a versatile development board integrating an ESP32-WROVER-E module with a SIMCom A7670E 4G/2G cellular network module. It provides comprehensive wireless connectivity including Wi-Fi, Bluetooth, LTE (4G), and GSM (2G), along with GPS capabilities. This board is designed for various IoT applications requiring robust communication and processing power.
Figure 1: LILYGO T-Call A7670E Development Board (Front and Back)
Figure 2: LILYGO T-Call A7670E Development Board (Perspective)
2. Guia de configuració
2.1 Contingut del paquet
Abans de començar, assegureu-vos que tots els elements estiguin presents al paquet:
Figura 3: Contingut del paquet
- 1 x T-Call-A7670E Development Board
- 1 x Antena LTE
- 2 x 19-Pin Headers
- 1 x Antena GPS
2.2 Dimensions físiques
The board has compact dimensions suitable for various projects:
Figure 4: Board Dimensions
- Length (L): 7.4 cm
- Width (W): 2.9 cm
- Height (H): 0.8 cm
2.3 Diagrama de pins
Understanding the pinout is crucial for connecting peripherals and integrating the board into your projects. The board supports a Nano SIM card only.
Figure 5: LILYGO T-Call A7670E Pinmap
Key pin definitions include:
- Potència: 3V3, 5V
- Terra: GND
- GPIO: General Purpose Input/Output pins
- ADC: Analog-to-Digital Converter pins
- DAC: Digital-to-Analog Converter pins
- I2C: Inter-Integrated Circuit communication pins
- SPI: Serial Peripheral Interface communication pins
- UART: Universal Asynchronous Receiver-Transmitter pins
- A7670E Specific Pins: TX (26), RX (25), PWKEY (4), DTR (14), RI (13), RESET (27)
2.4 SIM Card and Antenna Installation
- Targeta SIM: Insert a Nano SIM card into the designated slot on the board. Ensure correct orientation.
- LTE Antenna: Connect the LTE antenna to the U.FL connector labeled for LTE.
- Antena GPS: Connect the GPS antenna to the U.FL connector labeled for GPS.
- Pin Headers: Solder the provided 19-pin headers to the board if you intend to use it on a breadboard or with custom wiring.
3. Instruccions de funcionament
3.1 Powering the Board
The LILYGO T-Call A7670E operates with a supply voltage of 3.4V to 4.2V. It can be powered via the USB-C port or through the dedicated power pins.
3.2 Software and Development
The ESP32 module is programmable using various development environments, including the Arduino IDE and ESP-IDF. For sample code and detailed technical documentation, refer to the official LILYGO GitHub repository:
This repository provides examples and libraries to help you get started with the ESP32 and A7670E module functionalities, including cellular communication (4G/2G), GPS, Wi-Fi, and Bluetooth.
3.3 Connectivitat
- Wi-Fi: The ESP32-WROVER-E module supports Wi-Fi 802.11 b/g/n for local network connectivity.
- Bluetooth: Bluetooth v4.2 BR/EDR and BLE (Bluetooth Low Energy) are supported for short-range wireless communication.
- Cellular (4G/2G): The A7670E module provides LTE-FDD (B1/B3/B5/B7/B8/B20) and GSM (900/1800MHz) connectivity. This allows for wide-area network communication.
- GPS: Integrated GPS functionality enables location tracking.
4. Manteniment
To ensure the longevity and optimal performance of your LILYGO T-Call A7670E development board, consider the following:
- Keep the board clean and free from dust and debris.
- Avoid exposing the board to extreme temperatures or humidity.
- Handle the board with care to prevent physical damage to components or connectors.
- Assegureu-vos que la font d'alimentació adequada dins del volum especificattagrang e (3.4V-4.2V).
5. Solució De Problemes
If you encounter issues with your LILYGO T-Call A7670E, consider these general troubleshooting steps:
- Sense energia: Verify that the power source is connected correctly and provides the specified voltage. Check the USB cable and power supply.
- El mòdul no respon: Ensure all connections are secure. Try resetting the board using the reset button or by power cycling.
- Problemes de connectivitat (Wi-Fi/Bluetooth/Mòbil):
- Comproveu les connexions de l'antena.
- Verify that the SIM card is correctly inserted and activated.
- Ensure your code is correctly initializing and configuring the respective modules.
- For cellular, confirm that the frequency bands supported by the A7670E (LTE-FDD B1/B3/B5/B7/B8/B20, GSM 900/1800MHz) are compatible with your local network provider.
- Problemes de càrrega de firmware: Ensure correct board selection and port in your IDE. Check USB drivers are installed.
For more specific technical support, refer to the official GitHub repository or contact LILYGO customer service.
6. Especificacions
Detailed specifications for the LILYGO T-Call A7670E development board:
Figure 6: T-Call-A7670E Specifications
| Característica | Detall |
|---|---|
| Producte | T-Call-A7670E |
| MCU | ESP32 |
| LTE & GSM Module | A7670E |
| GPS | Sí |
| ESP32 Clock Speed | 240 Mhz |
| Flash | 4 MB |
| PSRAM | 8 MB |
| Connectivitat sense fil | Wi-Fi: 802.11 b/g/n, Bluetooth: v4.2 BR/EDR and BLE |
| Interfícies perifèriques | I2C, SPI, UART, SDIO, I2S, CAN |
| Factor de forma | LGA |
| Suport regional | Europe, Middle East, South Korea, Thailand |
| Dimensions | 24.0 x 24.0 x 2.3 mm (Module) |
Figure 7: A7670E Product Parameters
| Paràmetre | Valor |
|---|---|
| Frequency Bands (LTE-FDD) | B1/B3/B5/B7/B8/B20 |
| Frequency Bands (GSM) | 900/1800MHz |
| Power Consumption (LTE) | 10 Mbps (DL) / 5 Mbps (UL) |
| Power Consumption (GPRS/EDGE) | 236.8 Kbps (DL) / 236.8 Kbps (UL) |
| Data Transfer (LTE) | 3.8 mA |
| Data Transfer (GSM) | 3.5 mA |
| Protocol | TCP/IP/IPV4/IPV6/DNS/Multi-PDP/FTP/FTPS/HTTP/HTTPS |
| Android RIL Support | Android 5.0/6.0/7.0/8.0/9.0 |
| Controlador USB | Microsoft Windows 7/8/10, Linux, Android |
| Subministrament Voltage (V) | 3.4 ~ 4.2V |
| SIM Card Voltage | 1.8V / 3.0V |
| Certificació | RoHS\REACH\CE(RED) |
7. Garantia i Suport
LILYGO is committed to providing quality products and support. For any questions or technical assistance, please refer to the following:
- Suport tècnic: The official LILYGO GitHub repository (T-A76XX) is the primary resource for code examples, schematics, and detailed technical information.
- Atenció al client: If you have any questions about the product, or require assistance with product customization or bulk purchases, please contact LILYGO customer service directly.
Figure 8: LILYGO Official Exclusive Service
8. Consells d'usuari
- Documentació: Always check the official LILYGO GitHub repository for the latest code, schematics, and detailed documentation. This is often the quickest way to find solutions and examples for your projects.
- Compatibilitat regional: Abans de la compraasing or deploying, verify that the A7670E module's supported frequency bands (LTE-FDD B1/B3/B5/B7/B8/B20, GSM 900/1800MHz) are compatible with the cellular networks in your target region. The A7670E variant specifically supports Europe, Middle East, South Korea, and Thailand.
- Característiques d'àudio: While the A7670E module supports audio, ensure your specific application and code correctly implement the necessary audio interfaces and functionalities if audio is a requirement.
