Example "MC20_GPRSHTTP" does not work on Wio Tracker

Arduino, Seeeduino Serials and mutants. Share your problems and experence on arduino compatible board such as seeeduino/stalker, etc.

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jim_king_2000
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Posts: 4
Joined: Fri Jun 14, 2019 5:23 pm

Example "MC20_GPRSHTTP" does not work on Wio Tracker

Post by jim_king_2000 » Sat Jun 15, 2019 10:46 am

I connected my Wio Tracker board to Arduino IDE and it worked fine. And I put my 4G nano sim card into the sim socket in the board.

Then I opened the example "MC20_GPRSHTTP" and downloaded the firmware into the board. The result was always failure(see below).

10:31:47.839 ->
10:31:47.839 -> Power On!
10:31:53.370 ->
10:31:53.370 ->
10:31:53.370 ->
10:31:53.370 ->
10:31:53.370 ->
10:31:53.370 ->
10:32:24.386 ->
10:32:24.386 -> IP:
10:32:34.384 -> ERROR:QIOPEN
10:32:44.410 -> ERROR:QIOPEN
10:32:54.409 -> ERROR:QIOPEN
10:33:04.397 -> ERROR:QIOPEN
10:33:14.402 -> ERROR:QIOPEN
10:33:14.402 -> Connect Error!

I tried both 4G cards of CMCC and China TeleCOM, the error messages are the same.

How can I use GPRS TCP then?

Thanks,
Jim Jin

jim_king_2000
Pre-kindergarten
Pre-kindergarten
Posts: 4
Joined: Fri Jun 14, 2019 5:23 pm

Re: Example "MC20_GPRSHTTP" does not work on Wio Tracker

Post by jim_king_2000 » Sun Jun 16, 2019 5:57 pm

When I run the other example "MC20_SMSSend", the registration of network fails (the code is: gpsTracker.waitForNetworkRegister()). There is one interesting thing: when I installed the 4G sim card of China Telecom, the "NET" led on the board blinks. It does not blink with CMCC sim card.

bill.yu
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Joined: Mon Apr 02, 2018 11:05 am

Re: Example "MC20_GPRSHTTP" does not work on Wio Tracker

Post by bill.yu » Mon Jun 17, 2019 6:31 pm

Hi there,

For GPRS: you have to configure your own APN @  const char apn[10] = "XXXX"; You can check with your SIM card carrier about the APN. 

Coz I can not access https://os.mbed.com/media/uploads/mbed_ ... /hello.txt from my area, so i replace to  raw.githubusercontent.com. If you can access mbed website. You can use this configure. 

you have to connect the antenna, or else, it can not connect the network. thanks.

---------------------------------------------------------------------------
const char URL[100] = "mbed.org";
char http_cmd[100] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\r\n\r";
---------------------------------------------------------------------------

Code: Select all

#include "MC20_Common.h"
#include "MC20_Arduino_Interface.h"
#include "MC20_GPRS.h"

#define RGBPIN 10

GPRS gprs = GPRS();
const char apn[10] = "CMNET";
const char URL[100] = "raw.githubusercontent.com";
char http_cmd[100] = "GET SeeedDocument/forum_doc/master/hello.txt HTTP/1.0\n\r\n\r";
int port = 80;

int ret = 0;

void setup() {
  pinMode(RGBPIN, OUTPUT);
  digitalWrite(RGBPIN, LOW);
  SerialUSB.begin(115200);

  gprs.Power_On();
  SerialUSB.println("\n\rPower On!");

  if(!(ret = gprs.init(apn))) {
    SerialUSB.print("GPRS init error: ");
    SerialUSB.println(ret);
  }

  gprs.join();
  SerialUSB.print("\n\rIP: ");
  SerialUSB.print(gprs.ip_string);

  if(gprs.connectTCP(URL, port)) {
    gprs.sendTCPData(http_cmd); 
  } else {
    SerialUSB.println("Connect Error!");
  }
}

void loop() {
  /* Debug */
  if(SerialUSB.available()){
    serialMC20.write(SerialUSB.read());
  }
  if(serialMC20.available()){   
    SerialUSB.write(serialMC20.read()); 
  }

}
Here is the output from arduino serial port.

Code: Select all


Power On!


IP: 
10.11.176.242


HTTP/1.1 400 Bad Request
Server: GitHub.com
Content-Type: text/html; charset=utf-8
ETag: "5c3cbd7d-23a1"
Content-Security-Policy: default-src 'none'; style-src 'unsafe-inline'; img-src data:; connect-src 'self'
X-GitHub-Request-Id: 3B94:3B5F:1E39E89:2096F1A:5CEE4C59
Accept-Ranges: bytes
Content-Length: 9121
Accept-Ranges: bytes
Date: Wed, 29 May 2019 09:09:46 GMT
Via: 1.1 varnish
Connection: close
X-Served-By: cache-lax8640-LAX
X-Cache: MISS
X-Cache-Hits: 0
X-Timer: S1559120986.255221,VS0,VE27
Vary: Accept-Encoding
X-Fastly-Request-ID: 75eb3c14db3e85d903935c22fb9a7c822e9a818d


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