🌟LilyGo T-A7670X🌟

News

• The TinyGSM used in the example is a fork to support A7670 and SIM7672,If you use the master branch, the compilation will not go smoothly

1️⃣Product

Product(PinMap)	SOC	Flash	PSRAM	Schematic
T-A7670X	ESP32-WROVER-E	4MB	8MB(QSPI)	schematic
T-Call-A7670X	ESP32-WROVER-E	4MB	8MB(QSPI)	schematic

2️⃣Examples

Example	T-A7670X	T-Call-A7670X	T-SIM7672G
ATdebug	✅	✅	✅
Blynk_Console	✅	✅	✅
GPSShield	✅ (Just T-A7670G)	❌ (Can't run)	❌ (Can't run)
GPS_BuiltIn	✅	✅	✅
GPS_NMEA_Parse	✅	✅	✅
HttpClient	✅	✅	✅
HttpsClient	✅	✅	✅
MqttClient	✅	✅	✅
ReadBattery	✅	❌ (Can't run)	✅
Sleep	✅	✅	✅
Voice_Call	✅	✅	❌ (No support)
SDCard	✅	❌ (Can't run)	✅

Quick start ⚡

3️⃣ PlatformIO Quick Start (Recommended)

1. Install Visual Studio Code and Python
2. Search for the PlatformIO plugin in the VisualStudioCode extension and install it.
3. After the installation is complete, you need to restart VisualStudioCode
4. After restarting VisualStudioCode, select File in the upper left corner of VisualStudioCode -> Open Folder -> select the LilyGO-T-A7670X directory
5. Wait for the installation of third-party dependent libraries to complete
6. Click on the platformio.ini file, and in the platformio column
7. Select the board name you want to use in default_envs and uncomment it.
8. Uncomment one of the lines src_dir = xxxx to make sure only one line works
9. Click the (✔) symbol in the lower left corner to compile
10. Connect the board to the computer USB
11. Click (→) to upload firmware
12. Click (plug symbol) to monitor serial output
13. If it cannot be written, or the USB device keeps flashing, please check the FAQ below

4️⃣ Arduino IDE Quick Start

• It is recommended to use platformio without cumbersome steps

1. Install Arduino IDE
2. Install Arduino ESP32 2.0.5 or above
3. Copy all folders in lib folder to Arduino library folder (e.g. C:\Users\YourName\Documents\Arduino\libraries)
4. Open ArduinoIDE ,Tools , Look at the picture to choose

   Setting	Value
   Board	ESP32 Dev Module
   CPU Frequency	240MHz
   Core Debug Level	None
   Erase All Flash Before Sketch Upload	Disabled
   Events Run On	Core 1
   Flash Frequency	80MHz
   Flash Mode	QIO
   Flash Size	4MB (32Mb) (Unchangeable)
   JTAG Adapter	Disabled
   Arduino Runs On	Core 1
   Partition Scheme	Default 4MB with spiffs(1.2MB APP/1.5MB SPIFFS)(Unchangeable)
   PSRAM	Enabled
   Upload Speed	921600

5. LilyGO-T-A7670X folder -> examples
6. For runnable examples, please refer to the example list above.
7. Open the corresponding board macro definition above <utilities.h>
8. Select Port
9. Click upload , Wait for compilation and writing to complete
10. If it cannot be written, or the USB device keeps flashing, please check the FAQ below

5️⃣ Notes for new Users <T-A7670E/T-A7670G/T-A7670SA>

• The following does not apply to T-Call-A7670

1. Pin VIN is a USB input, if a battery is being used to power the device there will be no voltage output from VIN meaning 3.3v is the only power output.
2. When using the built-in battery pack the on/off switch will function as normal, supplying/cutting off power to the board, However, if an external battery pack is used and attached to the VBAT pin the on/off switch will be bypassed meaning the only way to shut off will be to disconnect the batteries.
3. On/off switch is for battery use only, it will not function when plugged into USB.
4. Recommended solar panels are 4.4v to 6v DO NOT EXCEED OR BOARD MAY BE DAMAGED
5. When an SD card in you can not upload software in Arduino IDE since the SD card uses IO2 as CS, the SD card must be removed when uploading a new sketch.
6. The T-A7670G modem does not contain a GPS positioning component and requires an additional external GPS positioning module to use the positioning function. LilyGo T-A7670G with GPS uses Quectel L76K as the T-A7670G auxiliary positioning function, which requires a part of the IO, please refer to the usage example

6️⃣ FAQ

• Can't upload any sketch，Please enter the upload mode manually.
  1. Connect the board via the USB cable
  2. Press and hold the BOOT button , While still pressing the BOOT button, press RST
  3. Release the RST
  4. Release the BOOT button
  5. Upload sketch
• Upgrade modem firmware
  1. T-A7670x Upgrade docs

7️⃣Resource

1. A7670-Series-Datasheet
   • A7670 AT Command
   • A7670 MQTT(S) Application
   • A7670 HTTP(S) Application
   • A7670 GNSS Application
   • A7670 FTP Application
   • A7670 LBS Application
   • A7670 SSL Application
   • A7670 Sleep Application
   • A7670 Hardware Design manual