🏆T-Deck-MAX 🏆

Front	Back

T-Deck-MAX Revision Update Notes:

• Added the XL9555 IO expansion chip

• Remove the distinction between the audio version and the 4G version. Now, integrate the 4G (A7682E) and the audio (ES8311) onto a single board.

• Add a LoRa antenna selection switch, controlled by XL9555 to select the internal or external antenna. The default is the internal antenna.

• Add an audio channel output selection switch, and control the selection of using A7682E / ES8311 audio output through XL9555.

• Add the vibration motor driving chip DRV2605

How to confirm that your device is T-Deck-MAX?

Download the WireScan firmware and then open the serial port to confirm.

How to download the firmware? - click me

LilyGo Store

Before flashing firmware, connect the device to your computer, select the correct COM port, and put the board into download mode:

1. Press and hold the BOOT button.
2. Press and release the RST button on the back.
3. Release the BOOT button.

• Download the tool from LILYGO Spark.

• Search for your device T-Deck Max and download the corresponding firmware.

A7682E https://en.simcom.com/product/A7682E.html

A7682E is the LTE Cat 1 module that supports wirelesscommunication modes of LTE-FDD/GSM/GPRS/EDGE. It supports maximum 10Mbps downlink rate and 5Mbps uplink rate. A7682E supports multiple built-in network protocols.

Insert the SIM card and it supports calls, text messages and internet access.

Test the functionality of the A7682E using examples/A7682E/test_AT

Control Via AT Commands

Frequency Bands LTE-FDD B1/B3/B5/B7/B8/B20
GSM/GPRS/EDGE 900/1800 MHz
Supply Voltage 3.4V ~ 4.2V, Typ: 3.8V
LTE Cat 1   (Uplink up to 5Mbps, Downlink up to10Mbps)
EDGE        (Uplink/Downlink up to 236.8Kbps)
GPRS        (Uplink/Downlink up to 85.6Kbps)
Firmware update via USB/FOTA
Support language calls
Support sending and receiving SMS messages
network protocols (TCP/IP/IPV4/IPV6/Multi-PDP/FTP/FTPS/HTTP/HTTPS/DNS)
RNDIS/PPP/ECM
SSL

❗ Note: The speakers of A7682E and ES8311 are shared. Set IO12 of XL9555 to HIGH and output the audio of A7682E. The sound is too weak. Set IO06 of the XL9555 to HIGH to enable the power amplifier. example

❗ Note: The speakers of A7682E and ES8311 are shared. Set IO12 of XL9555 to LOW and output the audio of ES8311. The sound is too weak. Set IO06 of the XL9555 to HIGH to enable the power amplifier.

❗ Note:

When using the internal antenna, set IO04 of XL9555 to HIGH. When using an external antenna, set IO04 of XL9555 to LOW. The current repository uses HIGH for internal and LOW for external antenna selection.

The following lists all examples to help you quickly get started with each module:

1. First use: Flash WireScan firmware first, verify I2C communication is normal
2. Display related: Start with Elink_paper/touch or Elink_paper/display
3. Wireless communication: WiFi test uses test_wifi, LoRa uses lora_send/lora_recv
4. 4G communication: Use A7682E/test_AT to test AT commands
5. Audio functions: Try ES8311/playWAV first to play WAV files
6. Battery related: Use battery/bq25896 to check battery status

🟢 PlatformIO is recommended because these examples were developed on it. 🟢

1. Install Visual Studio Code and Python, and clone or download the project;
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 opening this project, PlatformIO will automatically download the required tripartite libraries and dependencies, the first time this process is relatively long, please wait patiently;
5. After all the dependencies are installed, you can open the platformio.ini configuration file, uncomment in example to select a routine, and then press ctrl+s to save the .ini configuration file;
6. Click ☑️ under VScode to compile the project, then plug in USB and select COM under VScode;
7. Finally, click the ➡️ button to download the program to Flash;

1. Install Arduino IDE

2. Copy all files under this project/lib/ and paste them into the Arduino library path (generally C:\Users\YourName\Documents\Arduino\libraries);

3. Open the Arduino IDE and click File->Open in the upper left corner to open an example in this project/example/xxx/xxx.ino under this item;

4. Then configure Arduino. After the configuration is completed in the following way, you can click the button in the upper left corner of Arduino to compile and download;

Board-level macros are now centralized in a single public header:

• lib/TDeckMaxBoard/src/TDeckMaxBoard.h

Use it directly in examples:

#include <TDeckMaxBoard.h>

Pin Mapping : pinmap

Sleep power consumption.

For more information, see the ./hardware directory.