ESP32-S3-A-SIM7670X-4G HAT

ESP32-S3-A-SIM7670X-4G HAT 300px ESP32-S3R2 Type C UART

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Overview

Introduction

The ESP32-S3-A-SIM7670X-4G HAT (the development board) is a multifunctional, high-performance microcontroller development board designed by Waveshare. It integrates an A/SIM7670X 4G communication module, a universal OV camera interface, a TF card slot, RGB colorful lights, an 18650 battery slot, a battery voltage measurement IC, a solar charging interface, and other peripherals. It employs the ESP32-S3R2, a system-level chip (SoC) that integrates low-power Wi-Fi and BLE5.0. Additionally, it comes with an external 16MB Flash and 2MB PSRAM. The SoC incorporates a hardware encryption accelerator, RNG, HMAC, and digital signature modules, meeting the security requirements of the Internet of Things (IoT).
The A/SIM7670X 4G communication module provides mobile network capabilities, enabling functionalities like portable Wi-Fi and IoT data transmission when combined with the ESP32-S3R2. Its various low-power operating modes cater to power consumption demands in IoT, mobile devices, outdoor monitoring, smart home applications, and other scenarios.

Features

• Comes with high-performance Xtensa® 32-bit LX7 dual-core processor with up to 240MHz.
• Support 2.4GHz WiFi (802.11 b/g/n) and Bluetooth® 5 (LE) with onboard antenna.
• Built-in 512 SRAM, 384KB ROM, 2MB PSRAM, and with external 16MB Flash.

Hardware Description

• Onboard ESP32-S3 USB connects to A/SIM7670X USB connector, using TinyUSB protocol for PPP dial-up networking as a portable WiFi function.
• Onboard 18650 battery interface for 3.7V single-cell 18650 lithium batteries, pay attention to the lithium battery interface's positive and negative labels.
• This development board mainly includes two parts: ESP32-S3 and 7670 series 4G Cat-1 module.
  • ESP32-S3
    • Camera function: 24pin camera interface, the supported cameras as shown below:

Model	Max Resolution	Color Type	Len Size
OV2640	1600 x 1200	color	1/4"
OV3660	2048 x 1536	color	1/5"
OV5640	2592 x 1944	color	1/4"
OV7670	640 x 480	color	1/6"
OV7725	640 x 480	color	1/4"
NT99141	1280 x 720	color	1/4"
GC032A	640 x 480	color	1/10"
GC0308	640 x 480	color	1/6.5"
GC2145	1600 x 1200	color	1/5"
BF3005	640 x 480	color	1/4"
BF20A6	640 x 480	color	1/10"
SC101IOT	1280 x 720	color	1/4.2"
SC030IOT	640 x 480	color	1/6.5"
SC031GS	640 x 480	color	1/6"

• • • Onboard C3 antenna, use 0R shorting optional external antenna.
    • Onboard TF-Card slot, supports FTP transfer of files and pictures.
    • Onboard USB to UART chip and automatic download circuit, you can burn programs and firmware after connecting the Type-C cable.
    • Development board reserved GPIO can be used for external device connection and can be flexibly configured to I2C, SPI, and other peripheral functions.
    • A/SIM7670X
    • Onboard GNSS IPX 1 connector for GNSS positioning function using related commands after power-on.
    • Onboard microphone and speaker header, the A7670 series development board supports phone call function.
• Onboard solar power charging function and the input voltage can change according to different resistors. When solar power is charging, the onboard green LED will be on.
• Onboard dial-up switch for powering on cameras, USB HUB circuits, and 4G modules, and can switch the USB circuit of 4G modules.
• Onboard circuit switch for controlling the circuits with 18650 batteries power supply.
• Onboard 18650 battery anti-reverse function and the onboard yellow LED will be on when the batteries are reversely connected.
• Onboard battery voltage measurement IC, can be used for battery level reminder when working outdoors without an external power supply.

Module Selection

SIM7670G

• SIM7670G is a Qualcomm solution, which can realize GNSS and digital transmission function, SIM7670G itself can't be used to receive phone calls.

A7670X

• A7670X R2 is a solution for China to realize GNSS and phone call functions.

Hardware Connection

This development board's ESP32-S3 UART to USB module and 4G module USB use the same Type-C interface, and you can select the USB interface of the 4G module, ESP32-S3 USB connector, or the Type-C interface through the dip switch on the back of the development board. This function is mainly used when the ESP32-S3 uses Tiny USB 4G module communication as a portable WiFi, wireless hotspot.

Development Environment Setup

• The following development system is Windows by default.

ESP-IDF

• It is recommended to develop with the VSC plug-in.

Develop with VSCode Plug-in

Install VSCode

1. Open the download page of the official VSCode website, and select the corresponding system and system bit to download.

2. After running the installation package, the rest can be installed by default, but here for the subsequent experience, it is recommended to check boxes 1, 2, and 3.

• • After the first and second items are enabled, you can open VSCode directly by right-clicking files or directories, which can improve the subsequent user experience.
  • After the third item is enabled, you can select VSCode directly when you choose how to open it.

Install Espressif IDF Plug-in

• Note: The latest version of the current plug-in is V1.6.0, for a consistent experience, users can choose the same version as us.

1. Open VSCode and use the shortcut key Shift + Ctrl + X to enter the plugin manager.

2. In the search bar, type Espressif IDF, select the corresponding plug-in, and click install.

3. Press F1 to enter:

esp-idf: configure esp-idf extension

4. Choose express (This tutorial is for first-time users, so only the first general installation tutorial is covered.)

5. Open and display this screen.

6. Choose a server to download.

7. Select the ESP-IDF version you want now, we choose the latest V5.0.1 (note that ESP-IDF started to support ESP32-S3 only after V4.4).

8. The following two are the ESP-IDF directory installation address and the ESP-IDF required tools installation address respectively.

• • Note: If you have installed ESP-IDF before, or if it has failed, please make sure to delete the file completely or create a new path.

9. Once the configuration is finished, click "install" to download.

10. Enter the download page, and it will automatically install the corresponding tools and environment, just wait a moment.

11. After the installation is completed, it will enter the following screen, indicating that the installation is finished.

Official Demo Usage

• Click here to view more details provided by the official ESP.

Creating a Demo

1. Using the shortcut F1, type:

esp-idf:show examples projects

2. Choose your current IDF version:

3. Take "Hello World" as an example:

4. Choose the corresponding demo.

5. The readme file will explain which chip the demo is suitable for (the following section will introduce how to use the demo and its file structure, which is omitted here).

6. Click to create the demo.

7. Choose the path to place the demo and ensure that there is no folder with the same name as the demo.

Modify COM Port

1. The corresponding COM port is displayed here, click on it to modify.

2. We check the device manager COM port, and select COM5, please select your corresponding COM port:

3. Choose the project and demo.

4. Then the COM port is modified.

Modify the Driver

1. Here shows the driver used, click here to modify the corresponding driver:

2. Choose the project or demo:

3. Wait for a few seconds after clicking.

4. Choose the driver we need, that is, the main chip ESP32S3.

5. Choose the openocd path, we can just choose one at random as it doesn't matter.

The Rest of the Status Bar Introduction

• ① SDK configuration editor: many functions and configurations of ESP-IDF can be modified within it.
• ② Clean up everything and delete all compiled files.
• ③ Compile.
• ④ Current download method, default is UART.
• ⑤ Program the current firmware, please do it after compiling.
• ⑥ Open the serial monitor to view serial information.
• ⑦ Combined button for compiling, programming, and opening the serial monitor (most commonly used during debugging).

Compile, Program, and Serial Port Monitoring

1. Click on the Compile, Program, and Open Serial Monitor buttons we described earlier.

2. It may take a long time to compile, especially for the first time.

• During this process, ESP-IDF may take up a lot of CPU resources and therefore may cause system lag.

3. Because we use CH343 as a USB to serial port chip, and the on-board automatic download circuit, it can be downloaded automatically without manual operation.

4. After successful download, it will automatically enter the serial monitor, and you can see the corresponding information output from the chip and prompt to reboot after 10s.

Arduino

• If you do not use arduino-esp32 before, you can refer to this link.

Install Arduino IDE

1. Open the official software download webpage, and choose the corresponding system and system bits to download.

2. You can choose "Just Download", or "Contribute & Download".

3. Run to install the program and install it all by default.

Install arduino-esp32 Online

1. Open Preferences.

2. Add the corresponding board manager URLs and click the button.

3. Add the following content in the first blank.

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

4. Save the setting.

5. Open the board manager, enter ESP32 in the search bar, and select version 2.0.11.

6. Wait for downloading.

7. arduino-esp32 is downloaded.

Use Arduino Demo

1. Select the demo, here we choose the demo to get the chip ID.

2. Select the board as ESP32S3 Dev Module.

3. Choose the COM5 port of ESP32-S3 USB.

4. Click the download button, then it compiles and downloads automatically.

5. Finish.

6. Open the Serial Port Monitor.

7. See the chip ID of the loop output.

Demo Explaination

ESP32-S3 Application

Camera

This demo is based on the CameraWebServer demo of the ESP32.

• Firstly, you need to set the WiFi name and password and switch the hardware to ESP32S3 by default.
• Please turn on CAM of the DIP switch on the back of the development board, and connect to the supported cameras.
• Please check CameraPins:

#define PWDN_GPIO_NUM     -1
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM     34
#define SIOD_GPIO_NUM     15
#define SIOC_GPIO_NUM     16
#define Y9_GPIO_NUM       14
#define Y8_GPIO_NUM       13
#define Y7_GPIO_NUM       12
#define Y6_GPIO_NUM       11
#define Y5_GPIO_NUM       10
#define Y4_GPIO_NUM       9
#define Y3_GPIO_NUM       8
#define Y2_GPIO_NUM       7
#define VSYNC_GPIO_NUM    36
#define HREF_GPIO_NUM     35
#define PCLK_GPIO_NUM     37

• Program the demo Burn the code and open the terminal to access the prompted IPs:

TF-Card

• Insert the TF card into the TF card slot.
• Define the pins:

const int SDMMC_CLK = 5;
const int SDMMC_CMD = 4;
const int SDMMC_DATA = 6;
const int SD_CD_PIN = 46;

• Program the demo, and open the terminal to display the file content:

RGB

Onboard a WS2812b RGB LED, and the signal pin is 38.
After programming the sample demo, the LED light is expected to display a gradient color.

BAT

This development board utilizes the MAX17048 as the battery charge measurement IC.

• First, confirm the I2C pin:

• Program the code and change the threshold:

4G Cat-1 Application

A7670X Series

HTTP

AT Command	Command Description	Return Value
AT+HTTPINIT	Enable HTTP service	OK
AT+HTTPPARA="URL", https://www.waveshare.cloud/api/sample-test/	Connect to the remote server	OK
AT+HTTPDATA=5,1000	Input data	DOWNLOAD <Key enter hello OK
AT+HTTPACTION=0	Enable HTTP request, 0: GET; 1: POST; 2: HEAD; 3: DELETE; 4: PUT	OK +HTTPACTION: 0,200,54
AT+HTTPTERM	Disable HTTP service	OK
AT+HTTPPARA	Set HTTP parameters	OK
AT+HTTPHEAD	Read the HTTP response header	OK
AT+HTTPREAD	Read HTTP response information	OK

MQTT

AT Command	Command Description	Return Value
AT+CMQTTSTART	Enable MQTT service	OK
AT+CMQTTACCQ=0,"Waveshare-Sim7028",0	Apply for MQTT client	OK
AT+CMQTTCONNECT=0,"tcp://mqtt.easyiothings.com",20,1	Send MQTT request, connect the private MQTT server (MQTTS)	OK
AT+CMQTTTOPIC=0,11	Input the message topic to be published	>sim7028test OK
AT+CMQTTPAYLOAD=0,9	Input the published message	OK >waveshare
AT+CMQTTPUB=0,0,60	Publish the message	OK +CMQTTPUB: 0,0
AT+CMQTTSUB=0,4,1	Subscribe to the message topics	>test OK +CMQTTSUBTOPIC: 0,0 [10:03:39.665]receive ←◆ +CMQTTRXSTART: 0,4,18 +CMQTTRXTOPIC: 0,4 test +CMQTTRXPAYLOAD: 0,18 { "msg": "hello" } +CMQTTRXEND: 0
AT+CMQTTSTOP	Stop MQTT service	OK
AT+CMQTTREL	Release client terminal	OK
AT+CMQTTUNSUBTOPIC	Release the subscribed topics	OK
AT+CMQTTUNSUB	Release Subscription	OK

GNSS (only for A7670E)

AT+CGNSSPWR=1,1,1	Enable GNSS function	+CGNSSPWR: READY!
AT+CGNSSTST=1	Enable GNSS data output	OK

Voice Call

• Connect the configured speaker to the development board:

ATD10086;	Dial phone numbers	OK VOICE CALL: BEGIN
ATA	Answer	OK VOICE CALL: BEGIN
ATH	Hang off	OK VOICE CALL: END: 000017

SIM7670X Series

HTTP

AT Command	Command Description	Return Value
AT+HTTPINIT	Enable HTTP service	OK
AT+HTTPPARA="URL", https://www.waveshare.cloud/api/sample-test/	Connect to the remote server	OK
AT+HTTPDATA=5,1000	Input the data	DOWNLOAD <Key enter hello OK
AT+HTTPACTION=0	Enable HTTP request, 0: GET; 1: POST; 2: HEAD; 3: DELETE; 4: PUT	OK +HTTPACTION: 0,200,54
AT+HTTPTERM	Disable HTTP service	OK
AT+HTTPPARA	Set HTTP parameters	OK
AT+HTTPHEAD	Read HTTP header	OK
AT+HTTPREAD	Read the HTTP response message	OK

MQTT

AT Command	Command Description	Return Value
AT+CMQTTSTART	Enable MQTT Service	OK
AT+CMQTTACCQ=0,"Waveshare-Sim7028",0	Request MQTT client	OK
AT+CMQTTCONNECT=0,"tcp://mqtt.easyiothings.com",20,1	Send MQTT request, connect to MQTT server (MQTTS)	OK
AT+CMQTTTOPIC=0,11	Enter message publishing topic	>sim7028test OK
AT+CMQTTPAYLOAD=0,9	Enter the content of the published message	OK >waveshare
AT+CMQTTPUB=0,0,60	Publish the message	OK +CMQTTPUB: 0,0
AT+CMQTTSUB=0,4,1	Subscribe to the message topic	>test OK +CMQTTSUBTOPIC: 0,0 [10:03:39.665]Receive ←◆ +CMQTTRXSTART: 0,4,18 +CMQTTRXTOPIC: 0,4 test +CMQTTRXPAYLOAD: 0,18 { "msg": "hello" } +CMQTTRXEND: 0
AT+CMQTTSTOP	Stop MQTT service	OK
AT+CMQTTREL	Release the client	OK
AT+CMQTTUNSUBTOPIC	Unsubscribe from the topic	OK
AT+CMQTTUNSUB	Release Subscription	OK

GNSS (Only for A7670E)

AT+CGNSSPWR=1	Enable GNSS function	+CGNSSPWR: READY!
AT+CGNSSTST=1	Enable GNSS data output	OK

Portable WiFi Demo Application

• SIM7670G only supports data transmission. There is a temporary bug in the portable WiFi demo.
• This demo application utilizes the TinyUSB protocol stack to communicate with the 4G Cat-1 module. It establishes internet access for the ESP32-S3 directly through PPP dial-up.
• This demo utilized the compiled firmware, and you can download it first.
• Download the firmware.
• Open the Flash Tools, select the development mode, choose the firmware, set the address to 0x0 as shown in the image, insert the SIM card, and proceed to download and start the demo.

• Turn on the 4G switch and turn off the USB on the back of the development board. Re-power the development board and wait for the colorful LED to display red. Open your phone and connect to the WiFi named 'ESP32-S3-A-SIM7670X-4G-HAT' with the password '12345678' to access the internet.

• Please click here to view the full project.

Resource

Document

• MicroPython Development Document
• ESP32 Arduino Core's Documentation
• Arduino IDE
• ESP-IDF

Demo

• Demo

Software

• Thonny Python IDE
• Arduino IDE
• GPS Debug Tool
• SSCOM

Datasheet

• ESP32-S3 Datasheet
• A76XX-Series-AT-Command-Manual-V1.09
• SIM76XX-Series-AT-Command-Manual-V1.01

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