Edge101 ESP32 IoT Controller Setup & Guide

This article guides readers on configuring 4G modules on the Edge101 mainboard, explaining the PCIe pinout and providing example code for network time synchronization using an ESP32 controller.

8.8 4G

The Edge101 mainboard does not come with a 4G module pre - installed, but it supports the installation of wireless modules such as 4G modules.

The PCIe pinout for wireless modules is as follows:

1	WAKEUP_OUT	2	VCC_3.3
3	U_BOOT	4	GND
5	NC	6	NC
7	NC	8	USIM_VCC
9	GND	10	USIM_DATA
11	VDD_EXT	12	USIM_CLK
13	NC	14	USIM_RST
15	GND	16	NC
17	NC	18	GND
19	WAKEUP_IN	20	NC
21	GND	22	RESET_IN
23	UART_RXD	24	VCC_3.3
25	UART_RTS	26	GND
27	GND	28	UART_CTS
29	GND	30	NC
31	UART_TXD	32	WAKEUP_OUT
33	RESET_IN	34	GND
35	GND	36	USB_DN
37	GND	38	USB_DP
39	VCC_3.3	40	GND
41	VCC_3.3	42	LED_WWAN
43	GND	44	NC
45	NC	46	NC
47	NC	48	NC
49	NC	50	GND
51	NC	52	VCC_3.3

Please refer to this PCIe pinout when configuring other wireless modules.

Example: Fetching Network Time

Hardware Requirements:

ESP32 IoT Programmable Controller (SKU: DFR0886)×1

Example Code:

/*! 
 * @file setNTP.ino
 * @brief : Network time synchronization example
 * @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @licence The MIT License (MIT)
 * @author [yangfeng]<[email protected]>
 * @version V1.0
 * @date 2021-08-18
 */
#include <DFRobot_AIR720UH.h>
DFRobot_AIR720UH      AIR720UH;

void setup(){
    int signalStrength,dataNum;
    Serial.begin(115200);
    Serial1.begin(115200);
    while(!Serial);
    AIR720UH.begin(Serial1);
    
    // SIM card status check
    Serial.println("Check SIM card......");
    if(AIR720UH.checkSIMStatus()){                               // Check SIM card status
        Serial.println("SIM card READY");
    }else{
        Serial.println("SIM card ERROR, Check if you have inserted SIM card and restart AIR720UH");
        while(1);
    }

    // Signal quality check
    Serial.println("Get signal quality......");
    delay(500);
    signalStrength = AIR720UH.checkSignalQuality();                // Get signal strength
    Serial.print("signalStrength =");
    Serial.println(signalStrength);

    // NTP network time synchronization configuration
    delay(500);
    Serial.println("set NTP ...");
    while(1){
      int data = AIR720UH.setNTP();
      if(data == 1){
        Serial.println("The network time is synchronized successfully!");  // Time synchronization successful
        break;
      }else if(data == 61){
        Serial.println("Network error");                         // Network error
        break;
      }else if(data == 62){
        Serial.println("DNS resolution error");                  // DNS resolution error
        break;
      }else if(data == 63){
        Serial.println("Connection error");                      // Connection error
        break;
      }else if(data == 64){
        Serial.println("Service response error");                // Service response error
        break;
      }else if(data == 65){
        Serial.println("Service response timeout");             // Service response timeout
        break;
      }else{
        Serial.println("set error");                             // Unknown error
      }
    }
}

void loop(){
  // Continuously fetch and display the network time
  char *buff = AIR720UH.getCLK();
  if(buff != NULL){
    Serial.println(buff);  // Output format example: 2021/08/18 14:30:45
  }
}