SIM7080G LPWA Module

Name: SIM7080G LPWA Module
Brand: ESP32
Price: 26.91 USD
Availability: InStock

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Overview

The SIM7080G is a versatile LPWA module that provides reliable communication capabilities for various IoT applications. Its compact design, low power consumption, and multiple interfaces make it an ideal choice for projects requiring cellular and GNSS functionalities.

Quick Navigation

📋 Specs 📍 Pinout 🔌 Wiring 🔧 Debug

Code Examples

Arduino

C++ Framework

ESP-IDF

Native Framework

ESPHome

YAML Configuration

PlatformIO

IDE & Toolchain

MicroPython

Python Framework

About SIM7080G LPWA Module

The SIM7080G is a Multi-Band LTE CAT-M and NB-IoT module designed for low-power, low-latency IoT applications. Its SMT form factor and extensive interface options make it highly flexible for embedded systems and industrial IoT.

⚡ Key Features

Supports LTE CAT-M & NB-IoT – Optimized for low-power, low-throughput communication.
Flexible Interfaces – Includes UART, GPIO, PCM, SPI, I²C, and more.
Designed for IoT Applications – Ideal for smart metering, asset tracking, and industrial automation.
Low Latency & Reliable Connectivity – Works in varied radio propagation conditions.

🔗 Need help choosing a SIM module? Check the ESP32 SIM Modules Comparison Table for a breakdown of LTE, 3G, and GPRS options. 🚀

Where to Buy

Get Your SIM7080G

Starting from

26.91$ per unit

Amazon.com Ships worldwide

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💡 Prices are subject to change. We earn from qualifying purchases as an Amazon Associate.

Technical Specs

SIM7080G Specifications

Complete technical specification details for SIM7080G LPWA Module

📊 Technical Parameters

Frequency Bands LTE-FDD B1/B2/B3/B4/B5/B8/B12/B13/B14/B18/B19/B20/B25/B26/B27/B28/B66/B71/B85

Data Rates LTE CAT M1: 589 Kbps (DL), 1119 Kbps (UL); LTE CAT NB2: 136 Kbps (DL), 150 Kbps (UL)

Operating Voltage 2.7V to 4.8V

Operating Temperature -40°C to +85°C

Dimensions 17.6mm x 15.7mm x 2.4mm

Download Full Datasheet

Pin Configuration

SIM7080G Pinout

The SIM7080G pinout includes power, UART communication, control, status indication, dual antenna connections (cellular and GNSS), and SIM card interface pins for LTE CAT-M/NB-IoT and GNSS functionality.

Visual Pinout Diagram

Pinout Diagram Primary

Total Pins

Pin Types

Power

Control

Quick Tips

LTE

CAT-M1 and NB-IoT connectivity for low-power IoT applications,Ultra-low power consumption: 3μA in sleep mode,Integrated multi-constellation GNSS (GPS, GLONASS, Galileo, BeiDou, QZSS)

Supports

LTE bands: B1, B2, B3, B4, B5, B8, B12, B13, B18, B19, B20, B25, B26, B28, B66,Requires SIM card for cellular connectivity

Power

consumption: 2A peak during transmission,Default baud rate: 115200 bps (configurable via AT commands)

Pin Descriptions

Pin Name	Type	Description	Notes
1 VBAT	Power	Power supply input (2.1V to 4.3V)	Requires stable power supply with peak current up to 2A
2 GND	Ground	Ground connection	Connect to common ground
3 TXD	UART TX	UART Transmit Data (connects to microcontroller RX)	Default baud rate: 115200 bps
4 RXD	UART RX	UART Receive Data (connects to microcontroller TX)	Default baud rate: 115200 bps
5 PWRKEY	Control	Power on/off control (active low)	Pull low for at least 500ms to power on
6 RESET	Control	Module reset (active low)	Pull low to reset the module
7 NETLIGHT	Status	Network status indication	LED indicator for network registration status
8 STATUS	Status	Module operating status indication	Shows module power state
9 ANT_MAIN	Antenna	Main antenna connection for LTE	Requires external LTE antenna
10 ANT_GNSS	Antenna	Antenna connection for GNSS	Requires external GNSS antenna for location services

Connection Guide

Wiring SIM7080G to ESP32

Connect the SIM7080G to your ESP32 via UART for AT command communication. The module requires a stable 2.1V-4.3V power supply with sufficient current capacity (peak 2A). External antennas are required for both LTE and GNSS functionality.

Visual Wiring Diagram

Wiring Diagram Recommended

Connections

Connection Status

Required

Optional

Protocol

UART

Pin Connections

SIM7080G Pin	ESP32 Pin	Description
1 VBAT Required	3.3V Power Supply	Provide stable power (NOT from ESP32 pin)
2 GND Required	GND	Common ground connection
3 TXD Required	GPIO16 (RX2)	SIM7080G TX to ESP32 RX
4 RXD Required	GPIO17 (TX2)	SIM7080G RX to ESP32 TX
5 PWRKEY Optional	GPIO4	Power control (pull low to power on)
6 RESET Optional	GPIO5	Module reset control
7 ANT_MAIN Required	External LTE Antenna	Connect LTE antenna
8 ANT_GNSS Optional	External GNSS Antenna	Connect GNSS antenna (optional)

⚠️

CRITICAL: Use a dedicated power supply (2.1V-4.3V, 2A peak) - DO NOT power from ESP32 pin!

Default

UART baud rate is 115200 bps

Ultra-low

power mode: 3μA in sleep, ideal for battery-powered IoT

External

LTE antenna is mandatory for network connectivity

GNSS

antenna is optional but required for location services

Pull

PWRKEY low for at least 500ms to power on the module

Monitor

NETLIGHT pin for network registration status

Insert

active SIM card before powering on

Ensure

good antenna placement for optimal signal reception

Supports

both LTE CAT-M1 (eMTC) and NB-IoT protocols

Help & Support

SIM7080G Troubleshooting

Common issues and solutions to help you get your sensor working

Common Issues

Debugging Tips

Additional Resources

Datasheet

Technical specifications and guidelines

Code Examples

SIM7080G Programming Examples

Ready-to-use code examples for different platforms and frameworks

#include <SoftwareSerial.h>

SoftwareSerial sim7080g(10, 11); // RX, TX
#define PWRKEY 9

void powerOnSIM7080G() {
    pinMode(PWRKEY, OUTPUT);
    digitalWrite(PWRKEY, LOW);
    delay(1000); // Hold PWRKEY low for 1 second
    digitalWrite(PWRKEY, HIGH);
    delay(5000); // Wait for the module to initialize
}

void setup() {
    Serial.begin(9600);
    sim7080g.begin(9600);
    powerOnSIM7080G();

    // Test AT command
    sim7080g.println("AT");
    delay(1000);
    while (sim7080g.available()) {
        Serial.write(sim7080g.read());
    }

    // Set SMS text mode
    sim7080g.println("AT+CMGF=1");
    delay(1000);
    while (sim7080g.available()) {
        Serial.write(sim7080g.read());
    }

    // Send SMS
    sim7080g.println("AT+CMGS=\"+1234567890\""); // Replace with recipient's number
    delay(1000);
    sim7080g.print("Hello from SIM7080G");
    sim7080g.write(26); // CTRL+Z to send
    delay(5000);
    while (sim7080g.available()) {
        Serial.write(sim7080g.read());
    }
}

void loop() {
    // Add code to handle incoming messages or other functionalities
}

This Arduino sketch interfaces with the SIM7080G module using the SoftwareSerial library. The module is powered on by toggling the PWRKEY pin (GPIO9). An AT command is sent to test communication. The module is configured to SMS text mode using the AT+CMGF command, and an SMS is sent to a specified recipient using AT+CMGS. The message is finalized with CTRL+Z (ASCII 26) to trigger transmission. Additional functionalities, such as LTE-based internet connectivity, NB-IoT communication, or GNSS data retrieval, can be implemented in the loop.

#include <stdio.h>
#include "driver/uart.h"
#include "driver/gpio.h"
#include "freertos/task.h"

#define TX_PIN 17
#define RX_PIN 16
#define PWRKEY_PIN 4
#define UART_PORT UART_NUM_1

void init_uart() {
    uart_config_t uart_config = {
        .baud_rate = 9600,
        .data_bits = UART_DATA_8_BITS,
        .parity = UART_PARITY_DISABLE,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
    };

    uart_param_config(UART_PORT, &uart_config);
    uart_set_pin(UART_PORT, TX_PIN, RX_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
    uart_driver_install(UART_PORT, 1024, 0, 0, NULL, 0);
}

void power_on_sim7080g() {
    gpio_set_direction(PWRKEY_PIN, GPIO_MODE_OUTPUT);
    gpio_set_level(PWRKEY_PIN, 0);
    vTaskDelay(1000 / portTICK_PERIOD_MS); // Hold PWRKEY low for 1 second
    gpio_set_level(PWRKEY_PIN, 1);
    vTaskDelay(5000 / portTICK_PERIOD_MS); // Wait for the module to initialize
}

void app_main(void) {
    init_uart();
    power_on_sim7080g();

    char *test_cmd = "AT\r\n";
    uart_write_bytes(UART_PORT, test_cmd, strlen(test_cmd));

    while (true) {
        char data[128];
        int len = uart_read_bytes(UART_PORT, data, sizeof(data), 100 / portTICK_PERIOD_MS);
        if (len > 0) {
            data[len] = '\0';
            printf("Response: %s\n", data);
        }
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}

This ESP-IDF example initializes UART communication with the SIM7080G module and powers it on using the PWRKEY pin (GPIO4). The UART interface is configured with GPIO17 as TX and GPIO16 as RX. An AT command is sent to test communication, and responses from the module are printed to the console. Additional functionalities, such as SMS, GNSS data retrieval, or NB-IoT/LTE-M communication, can be implemented.

uart:
  tx_pin: GPIO17
  rx_pin: GPIO16
  baud_rate: 9600

switch:
  - platform: gpio
    name: "SIM7080G Power"
    pin:
      number: GPIO4
      inverted: true

switch:
  - platform: template
    name: "Send AT Command"
    turn_on_action:
      - uart.write: "AT\r\n"

sensor:
  - platform: custom
    lambda: |-
      return {nullptr};
    sensors:
      - name: "SIM7080G Response"

This ESPHome configuration sets up UART communication with the SIM7080G module using GPIO17 (TX) and GPIO16 (RX) at 9600 baud. A GPIO-based switch is used to control the PWRKEY pin (GPIO4) for powering the module on or off. A template switch allows sending the AT command, and a custom sensor can be implemented to process responses from the module. Additional configurations can be added for SMS, NB-IoT, or GNSS functionalities.

platformio.ini

[env:sim7080g]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200

main.cpp

#include <HardwareSerial.h>
#include <Arduino.h>

HardwareSerial sim7080g(1);
#define PWRKEY 4

void power_on_sim7080g() {
    pinMode(PWRKEY, OUTPUT);
    digitalWrite(PWRKEY, LOW);
    delay(1000); // Hold PWRKEY low for 1 second
    digitalWrite(PWRKEY, HIGH);
    delay(5000); // Wait for initialization
}

void setup() {
    Serial.begin(115200);
    sim7080g.begin(9600, SERIAL_8N1, 16, 17); // RX, TX
    power_on_sim7080g();

    // Test AT command
    sim7080g.println("AT");
    delay(1000);
    while (sim7080g.available()) {
        Serial.write(sim7080g.read());
    }

    // Send SMS
    sim7080g.println("AT+CMGF=1"); // Set SMS to text mode
    delay(1000);
    sim7080g.println("AT+CMGS=\"+1234567890\""); // Replace with recipient's number
    delay(1000);
    sim7080g.print("Hello from SIM7080G");
    sim7080g.write(26); // CTRL+Z to send SMS
    delay(5000);
}

void loop() {
    // Handle incoming data or other functionalities
}

This PlatformIO code interfaces with the SIM7080G module using HardwareSerial on an ESP32. The `power_on_sim7080g` function toggles the PWRKEY pin (GPIO4) to activate the module. The AT command is sent to test communication, and SMS functionality is implemented in the setup. Additional functionalities, like GNSS data retrieval or LTE-M/NB-IoT connectivity, can be added in the loop.

from machine import UART, Pin
import time

# Initialize UART
uart = UART(2, baudrate=9600, tx=17, rx=16)
pwrkey = Pin(4, Pin.OUT)

def power_on_sim7080g():
    pwrkey.value(0)
    time.sleep(1)  # Hold PWRKEY low for 1 second
    pwrkey.value(1)
    time.sleep(5)  # Wait for module to initialize

def send_at(command):
    uart.write(command + '\r\n')
    time.sleep(1)
    while uart.any():
        print(uart.read().decode('utf-8'), end='')

# Power on the module
power_on_sim7080g()

# Test communication
send_at('AT')

# Send SMS
send_at('AT+CMGF=1')  # Set SMS to text mode
send_at('AT+CMGS="+1234567890"')  # Replace with recipient's number
uart.write("Hello from SIM7080G" + chr(26))

This MicroPython code communicates with the SIM7080G module over UART. The `power_on_sim7080g` function activates the module using the PWRKEY pin (GPIO4). The `send_at` function sends AT commands and prints the responses. The script initializes the module, tests communication, and demonstrates how to send an SMS. Additional logic for handling GNSS or NB-IoT/LTE-M communication can be added.

Summary

Wrapping Up SIM7080G

The ESP32 SIM7080G LPWA Module is a powerful SIM sensor that offers excellent performance and reliability. With support for multiple development platforms including Arduino, ESP-IDF, ESPHome, PlatformIO, and MicroPython, it's a versatile choice for your IoT projects.