Hello everyone!
I'm trying to do a simple gprs test connection but with no luck, I've tried a m2m german sim and also an italian wind sim.
Both sims see the network but don't properly register: AT+COPS? returns ERROR 50
The Maduino is powered with 1A usb charger, and serial connections are fine.
Here is the output and the code.
Am I doing something wrong? 
german sim
###comando n.1: AT
AT
###comando n.2: AT
AT
OK
OK
###comando n.3: ATI
ATI
Ai Thinker Co.LTD
A6
V03.03.20161229019H03
OK
###comando n.4: AT+IPR?
AT+IPR?
+IPR: 4800
OK
###comando n.5: AT+CPIN?
AT+CPIN?
+CPIN:READY
OK
###comando n.6: AT+CCID
AT+CCID
+CCID:8988303000000xxxxxx
OK
###comando n.7: AT+CSQ
AT+CSQ
+CSQ: 7,99
OK
####################################################CREG
###comando n.8: AT+CREG?
AT+CREG?
+CREG: 1,10
OK
###comando n.9: AT+CREG=1
AT+CREG=1
OK
###comando n.10: AT+CREG?
AT+CREG?
+CREG: 1,10
OK
####################################################COPS
###comando n.11: AT+COPS?
AT+COPS?
+COPS: 0
OK
###comando n.12: AT+COPS=0,2
AT+COPS=0,2
###comando n.13: AT+COPS?
AT+COPS?
+CME ERROR:50
####################################################CGATT
###comando n.14: AT+CGATT?
AT+CGATT?
+CGATT:1
OK
###comando n.15: AT+CGATT=1
AT+CGATT=1
OK
###comando n.16: AT+CGATT?
AT+CGATT?
+CGATT:1
OK
####################################################CIP
###comando n.17: AT+CGDCONT=1,"IP","WM"
AT+CGDCONT=1,"IP","WM"
OK
###comando n.18: AT+CIPSTATUS
AT+CIPSTATUS
+CIPSTATUS:0,IP INITIAL
1,IP INITIAL
2,IP INITIAL
3,IP INITIAL
4,IP INITIAL
5,IP INITIAL
6,IP INITIAL
7,IP INITIAL
OK
###comando n.19: AT+CGACT=1,1
AT+CGACT=1,1
+CME ERROR:148
###comando n.20: AT+CIPSTATUS
AT+CIPSTATUS
+CIPSTATUS:0,IP INITIAL
1,IP INITIAL
2,IP INITIAL
3,IP INITIAL
4,IP INITIAL
5,IP INITIAL
6,IP INITIAL
7,IP INITIAL
OK
###comando n.21: AT+CIFSR
AT+CIFSR
+CME ERROR:50
###comando n.22: AT+CIPSTART="TCP","www.com1.it",80
AT+CIPSTART="TCP","www.com1.it",80
+CME ERROR:50
###comando n.23: AT+CIPSEND=80
AT+CIPSEND=80
+CME ERROR:53
###comando n.24: GET http://www.com1.it/pippogprs HTTP/1.0
HOST:com1.it
GET http://www.com1.it/pippogprs HTTP/1.0
HOST:com1.it
+C###comando n.25: AT+CIPCLOSE
ME ERROR:58
AT+CIPCLOSE
+CME ERROR:50
italian sim
Setting baudrate...###comando n.1: AT
4����###comando n.2: AT
###comando n.3: AT
###comando n.4: AT
###comando n.5: AT
###comando n.6: AT
###comando n.7: AT
###comando n.8: AT
###comando n.9: AT
AT
OK
OK
After 3s, test begin!!
###comando n.10: ATI
ATI
Ai Thinker Co.LTD
A6
V03.03.20161229019H03
OK
###comando n.11: AT+IPR?
AT+IPR?
+IPR: 4800
OK
###comando n.12: AT+CPIN?
AT+CPIN?
+CPIN:READY
OK
###comando n.13: AT+CCID
AT+CCID
+CCID:89398xxxxxxxxx
OK
+CIEV: service, 0
+CIEV: roam, 0
+CREG: 2
###comando n.14: AT+CSQ
AT+CSQ
+CSQ: 10,99
OK
####################################################CREG
###comando n.15: AT+CREG?
AT+CREG?
+CREG: 1,12
OK
###comando n.16: AT+CREG=1
AT+CREG=1
OK
###comando n.17: AT+CREG?
AT+CREG?
+CREG: 1,12
OK
####################################################COPS
###comando n.18: AT+COPS?
AT+COPS?
+COPS: 2
OK
###comando n.19: AT+COPS=0,2
AT+COPS=0,2
###comando n.20: AT+COPS?
AT+COPS?
+CME ERROR:50
####################################################CGATT
###comando n.21: AT+CGATT?
AT+CGATT?
+CGATT:0
OK
###comando n.22: AT+CGATT=1
AT+CGATT=1
+CIEV: service, 0
+CIEV: roam, 0
+CREG: 2
+CME ERROR:30
+CME ERROR:50
###comando n.23: AT+CGATT?
AT+CGATT?
+CGATT:1
OK
####################################################CIP
###comando n.24: AT+CGDCONT=1,"IP","internet.wind",0,0
AT+CGDCONT=1,"IP","internet.wind",0,0
OK
###comando n.25: AT+CIPSTATUS
AT+CIPSTATUS
+CIPSTATUS:0,IP INITIAL
1,IP INITIAL
2,IP INITIAL
3,IP INITIAL
4,IP INITIAL
5,IP INITIAL
6,IP INITIAL
7,IP INITIAL
OK
###comando n.26: AT+CGACT=1,1
AT+CGACT=1,1
+CME ERROR:148
###comando n.27: AT+CIPSTATUS
AT+CIPSTATUS
+CIPSTATUS:0,IP INITIAL
1,IP INITIAL
2,IP INITIAL
3,IP INITIAL
4,IP INITIAL
5,IP INITIAL
6,IP INITIAL
7,IP INITIAL
OK
###comando n.28: AT+CIFSR
AT+CIFSR
+CME ERROR:50
###comando n.29: AT+CIPSTART="TCP","www.google.it",80
AT+CIPSTART="TCP","www.google.it",80
+CME ERROR:50
###comando n.30: AT+CIPSEND=80
AT+CIPSEND=80
+CME ERROR:53
###comando n.31: GET http://www.google.it/pippogprs HTTP/1.0
HOST:google.it
GET http://www.google.it/pippogprs HTTP/1.0
HOST:google.it
###comando n.32: AT+CIPCLOSE
+CME ERROR:58
AT+CIPCLOSE
+CME ERROR:50
#include <SoftwareSerial.h>
SoftwareSerial mySerial(7, 8);
#include<stdio.h>
#include<string.h>
#define DEBUG true
#define MONITOR Serial
#define CONTROL mySerial
#define SPEEDMONITOR 9600
#define SPEEDCONTROL 9600
unsigned char ctrl_z = 26;
int cn = 0;
void setup()
{
MONITOR.begin(SPEEDMONITOR);
CONTROL.begin(SPEEDCONTROL);
delay(1000);
int pon = 9;
int poff = 6;
int lowp = 5;
pinMode(pon, OUTPUT);
pinMode(poff, OUTPUT);
pinMode(lowp, OUTPUT);
digitalWrite(poff, LOW);
digitalWrite(lowp, HIGH);
digitalWrite(pon, HIGH);
delay(3000);
digitalWrite(pon, LOW);
delay(1000);
baudrate();
MONITOR.println("After 3s, test begin!!");
delay(3000);
}
void loop()
{
sendData("ATI", 500, DEBUG); // flushb(1000);
sendData("AT+IPR?", 500, DEBUG); // flushb(1000);
sendData("AT+CPIN?", 1000, DEBUG); flushb(1000);
sendData("AT+CCID", 2500, DEBUG);
sendData("AT+CSQ", 2500, DEBUG);
MONITOR.println("####################################################CREG");
sendData("AT+CREG?", 3000, DEBUG);
sendData("AT+CREG=1", 1000, DEBUG);
sendData("AT+CREG?", 2500, DEBUG);
MONITOR.println("####################################################COPS");
sendData("AT+COPS?", 500, DEBUG);
sendData("AT+COPS=0,2", 30000, DEBUG);
sendData("AT+COPS?", 500, DEBUG);
MONITOR.println("####################################################CGATT");
sendData("AT+CGATT?", 500, DEBUG);
sendData("AT+CGATT=1", 30000, DEBUG);
sendData("AT+CGATT?", 500, DEBUG);
MONITOR.println("####################################################CIP");
//sendData("AT+CGDCONT=1,\"IP\",\"em\"",1000,DEBUG);
//sendData("AT+CGDCONT=1,\"IP\",\"WM\"",1000,DEBUG);
sendData("AT+CGDCONT=1,\"IP\",\"internet.wind\",0,0", 1000, DEBUG);
sendData("AT+CIPSTATUS", 1000, DEBUG);
sendData("AT+CGACT=1,1", 1000, DEBUG);
sendData("AT+CIPSTATUS", 1000, DEBUG);
sendData("AT+CIFSR", 1000, DEBUG);
//sendData("AT+CIPSTART=\"TCP\",\"www.com1.it\",80",1000,DEBUG);
sendData("AT+CIPSTART=\"TCP\",\"www.google.it\",80", 1000, DEBUG);
sendData("AT+CIPSEND=80", 1000, DEBUG);
// sendData("GET http://www.com1.it/pippogprs HTTP/1.0\r\n HOST:com1.it\r\n\r\n",100,DEBUG);
sendData("GET http://www.google.it/pippogprs HTTP/1.0\r\n HOST:google.it\r\n\r\n", 100, DEBUG);
delay(10000);
sendData("AT+CIPCLOSE ", 1000, DEBUG);
}
void baudrate()
{
if (DEBUG) {
MONITOR.print("Setting baudrate...");
}
int i = 0;
for (i = 0; i < 1000; i++)
{
String msg = String("");
msg = sendData("AT", 1000, DEBUG);
if ( msg.indexOf("OK") >= 0 )
{
if (DEBUG) {
MONITOR.println("OK");
}
return;
}
}
if (DEBUG) {
MONITOR.println("ko");
}
}
String sendData(String command, const int timeout)
{
sendData(command, timeout, false);
}
String sendData(String command, const int timeout, boolean debug)
{
cn++;
String response = "";
if (debug)
{
MONITOR.print("###comando n.");
MONITOR.print(cn);
MONITOR.print(": ");
MONITOR.println(command);
}
CONTROL.println(command);
long int time = millis();
while ( (time + timeout) > millis())
{
while (CONTROL.available())
{
char c = CONTROL.read();
response += c;
// Serial.print(c);
}
}
if (debug) {
MONITOR.print(response);
}
return response;
}
void flushb(const int timeout)
{
long int time = millis();
while ( (time + timeout) > millis())
{
while (CONTROL.available())
{
char c = CONTROL.read();
MONITOR.print(c);
}
}
}
Grazie
Fabrizio