# ESP32-4G Development Kit TDM2401

> Source: https://maker.tdlogy.com/wiki-doc/tdm2401-esp32-4g-development-kit/

# I. Brief Introduction:

The ESP32 4G LTE CAT 1 Bluetooth Wifi Kit is a low-cost version. KIT uses the A7680C/A7683C** module, which supports the 4G LTE band, giving users flexibility in applications that require a high-speed Internet connection. It also replaces older 2G band boards.

This kit is a perfect match with a compact, simple, and easy-to-use integrated design.

## 1. Specifications

– Microcontroller: ESP-WROOM-32E (4MB flash) (WiFi and Bluetooth 4.2 LE).

– Supports 4G LTE CAT 1.

– Low energy consumption.

– Voltage used: 5VDC.

– Built-in **USB-UART input circuit using CH340 driver.

– Use a handy USB-C port.

– Compact Nano Sim slot (Open Lock).

– Supports Ipex antenna jack with included 3dbi leaf antenna to enhance network connectivity.

– Built-in network status indicator LED.

## 2. Product Included

– ESP32 4G LTE CAT 1×1 circuit.

– 4G 3dBi foil antenna x 1.

– Arduino library.

– Input circuit driver: CH340.

# II. Module and Pinout Images

## Image Module

## Pinout of Module

## Pinout or module pinout

# III. Download the support library

https://linhkienthuduc.com/lap-trinh-su-dung-module-sim-a7680c-a7670c-a7600c-sim7600ce-de-gui-tin-nhan-va-goi-dien

# IV. Specific examples of applications of modules in combination with fire and gas sensors

You can plug in the circuit as shown below:

Link code template: minhieu03/Module-ESP32-TDM2401 (github.com)

Open the Arduino and load the code.

You can refer to the specific video tutorial here: https://www.youtube.com/watch?v=JW7ia1GnZh8

## Conclusion

This module has 2 versions:

Esp-A7680C-no-volte (TDM2402): This version can only send messages, does not support calls.

Esp-A7680C-volte (TDM2401): This version is capable of calling and texting.

The ESP32 4G LTE CAT1 module is a versatile solution for IoT applications that require a fast and stable Internet connection. With the ESP-WROOM-32E microcontroller with built-in WiFi, Bluetooth 4.2 LE, and 4G LTE CAT1 support, it is suitable for projects that require both calling and messaging capabilities. It is an effective alternative to lower-band modules such as 2G.

The module comes with a full range of features such as a handy USB-C port, a Nano Sim slot, an Ipex antenna jack, and a network status LED. This makes it easy to integrate and control from embedded microcontrollers such as Arduino or other software platforms.

If you have not succeeded in any part, please leave a comment below, I will support as much as possible. Thank you for your support.

In addition, you should also pay attention to choosing to buy real goods, avoiding losing money unfortunately.