1. Introducció
This manual provides essential information for setting up and operating your LILYGO® TTGO T-A7670 R2 4G Development Board. This versatile module integrates an ESP32 microcontroller with an LTE CAT1 SIM module, supporting GSM/GPRS/EDGE communication, and is available in variants with or without GPS functionality. Please read these instructions carefully before use.
2. Contingut del paquet
Verifiqueu que tots els elements siguin presents al vostre paquet:
- 1 x T-SIM-A7670 Module
- 1 x Antena LTE
- 1 x cable d'alimentació
- 2 x Pin headers (16-pin each)
- 1 x GPS Antenna (Optional, included with GPS-enabled variants)
Note: An 18650 battery and SIM card are NOT included in the shipment and must be purchased separately.
3. Producte acabatview
The LILYGO T-A7670 R2 board is designed for IoT applications requiring 4G LTE connectivity. It features an ESP32 for Wi-Fi and Bluetooth, and an A7670 series module for cellular communication. Key components include:
- ESP32 Microcontroller: For Wi-Fi and Bluetooth connectivity.
- A7670 Module: Provides 4G LTE CAT1, GSM/GPRS/EDGE communication.
- 18650 Battery Holder: For portable power (battery not included).
- Port USB-C: For power, charging, and data communication (Burn/Debug).
- Port micro USB: For A7670 Module Firmware Upgrade, AT commands, and portable network card functionality.
- TF Card Holder: Per a emmagatzematge extern.
- SIM Antenna Holder: Per connectar l'antena LTE.
- GNSS Holder: For connecting an external GPS antenna (A7670G variant) or for internal GPS (A7670E/SA variants).
- Status and Net Lights: Indicators for module operation.
- Botons de reinici i arrencada: For controlling the ESP32.
- Interruptor de bateria: To turn the board on/off when powered by an 18650 battery.
4. Instruccions de configuració
4.1. Instal·lació de la targeta SIM
The board supports Nano SIM cards only. Carefully insert your Nano SIM card into the designated SIM card slot on the board.
4.2. Connexió d'antena
- LTE Antenna: Connect the provided LTE antenna to the SIM Antenna Holder.
- Antena GPS:
- For A7670E and A7670SA variants, GPS functionality is built-in.
- For the A7670G variant, an external GPS antenna must be connected to the GNSS Holder.
4.3. Font d'alimentació
The board can be powered via the USB-C port (DC 4.4V-6V input range) or by inserting an 18650 battery into the battery holder. Ensure the battery switch is in the 'ON' position if using battery power.
5. Funcionament
The LILYGO T-A7670 R2 is a development board, and its operation primarily involves programming the ESP32 and interacting with the A7670 module via AT commands or libraries.
5.1. Desenvolupament de programari
For detailed programming guides, examples, and libraries, please refer to the official GitHub repository:
https://github.com/Xinyuan-LilyGO/LilyGO-T-A7670X
The GitHub repository provides resources for setting up your development environment, flashing firmware, and utilizing the ESP32 and A7670 module functionalities.
6. Especificacions
6.1. Especificacions generals
- Dimensions (AxAxP): 11 x 2.2 x 3.5 cm
- Pes: 33 g
- Paquet: Sí
6.2. ESP32 MCU Parameters
| Paràmetre | Valor | Paràmetre | Valor |
|---|---|---|---|
| Velocitat del rellotge | 240 Mhz | Antena | A bord |
| 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 | ||
6.3. A7670 Module Parameters
| Paràmetre | Valor | Paràmetre | Valor |
|---|---|---|---|
| GNSS (opcional) | BeiDou/GPS/GLONASS | Dimensions (mm) | 24*24*2.3 |
| Subministrament Voltage (V) | 3.4~4.2 | Targeta SIM | 1.8V/3.0V |
| Interfícies | SIM Card/SD Card/UART/USB/ADC/I2C | ||
6.4. Característiques del programari
| Característica | Descripció |
|---|---|
| Protocol | TCP/IP/IPv4/IPv6/Multi-PDP/FTP/FTPS/HTTP/HTTPS/DNS |
| Controlador USB | Microsoft Windows 7/8/10, Linux, Android |
| Suport | TLS/File System/LBS/FOTA/WWAN (RNDIS)/ECM |
| Android RIL | Android 5.0/6.0/7.0/8.0/9.0 |
6.5. Power Consumption (mA)
| LTE (mA) | GSM (mA) |
|---|---|
| 3.8 | 3.5 |
6.6. A7670 Module Comparison
7. Solució De Problemes
- Funcionalitat GPS: If you are using an A7670G module and GPS is not working, ensure an external GPS antenna is properly connected to the GNSS holder. A7670E/SA variants have built-in GPS.
- Simultaneous GPS and GPRS/Internet: Some users have reported limitations with simultaneous GPS and GPRS/Internet usage on similar modules. Refer to the official GitHub repository for the latest software updates and community discussions regarding this functionality.
- External Wi-Fi Antenna: The ESP32 has an on-board Wi-Fi antenna. The board design does not typically support an external Wi-Fi antenna connection.
- El mòdul no respon: Ensure the board is properly powered and the correct USB driver is installed on your computer. Check the GitHub repository for specific driver requirements for your operating system.
8. Consells d'usuari
- Especificacions del model: Always verify the specific A7670 variant (G, E, or SA) you have, as features like GPS (built-in vs. external) and regional band support differ.
- Gestió d'energia: When using an 18650 battery, remember to use the battery switch to conserve power when the board is not in use.
- Nano SIM Only: Double-check that you are using a Nano SIM card for proper fit and function.
- Suport comunitari: The LILYGO community and GitHub repository are excellent resources for project ideas, code examples, and troubleshooting assistance.
9. Garantia i Suport
For technical support, documentation, and community forums, please visit the official LILYGO website or their GitHub repository. Information regarding product warranty is typically provided at the point of purchase or on the manufacturer's official channels.
