Techmokid
commented
2 years ago Upon doing a bunch of digging, I found what the problem was! The issue isn't actually the TinyGSM library. That was working fine. It was this section:
String getServerResponse(String server, int port, char resource[]) { Serial.println("DEBUGGING - INPUT TO FUNCTION: " + server); char tempServer[128]; server.toCharArray(tempServer,server.length()); Serial.println("DEBUGGING - OUTPUT FROM FUNCTION: " + server); return getServerResponse(tempServer,port,"/"); } String getServerResponse(String server, int port) { return getServerResponse(server,port,"/");} String getServerResponse(char server[], int port) { return getServerResponse(server, port, "/"); } String getServerResponse(char server[], int port, char resource[]) {
or more specifically:
char tempServer[128]; server.toCharArray(tempServer,server.length());
Note to any code devs out there who have forgotten. When converting from a String to a char array, remember to add "server.length() +1". char arrays are null terminated, meaning you gotta add an extra character. I COMPLETELY forgot about this since I don't work with char arrays very often (Ik ik, very bad of me, Strings are terrible for memory, ik that. But they are juust so USEFUL!)
So I managed to solve the issue!
Thankyou anyways!
[*] I have read the Troubleshooting section of the ReadMe
What type of issues is this?
[ ] Request to support a new module [ ] Bug or problem compiling the library [ ] Bug or issue with library functionality (ie, sending data over TCP/IP) [* ] Question or request for help
What are you working with?
Modem: SIM7000G Main processor board: Arduino Mega 2560 TinyGSM version: Latest
Scenario, steps to reproduce
I am attempting to connect to a server using the TinyGSM library, then disconnect and connect to a different server afterwards. This is a manual attempt to read frrom a website and, if there is a redirect, punch in the IP of that new server and connect to that instead.
Expected result
The module to:
Actual result
`
define PWRKEY 6
define RST 7
//#define DTR 8 //#define RI 9
define TX 10
define RX 11
define ALRT 12
// Select your modem: // #define TINY_GSM_MODEM_SIM800 // #define TINY_GSM_MODEM_SIM808 // #define TINY_GSM_MODEM_SIM868 // #define TINY_GSM_MODEM_SIM900
define TINY_GSM_MODEM_SIM7000
// #define TINY_GSM_MODEM_SIM7000SSL // #define TINY_GSM_MODEM_SIM7080 // #define TINY_GSM_MODEM_SIM5360 // #define TINY_GSM_MODEM_SIM7600 // #define TINY_GSM_MODEM_UBLOX // #define TINY_GSM_MODEM_SARAR4 // #define TINY_GSM_MODEM_M95 // #define TINY_GSM_MODEM_BG96 // #define TINY_GSM_MODEM_A6 // #define TINY_GSM_MODEM_A7 // #define TINY_GSM_MODEM_M590 // #define TINY_GSM_MODEM_MC60 // #define TINY_GSM_MODEM_MC60E // #define TINY_GSM_MODEM_ESP8266 // #define TINY_GSM_MODEM_XBEE // #define TINY_GSM_MODEM_SEQUANS_MONARCH
include
SoftwareSerial SerialAT(TX, RX); // RX, TX
// This is the amount of bytes to use for holding the message returned by your website
if !defined(TINY_GSM_RX_BUFFER)
define TINY_GSM_RX_BUFFER 1024
endif
define TINY_GSM_USE_GPRS true
define TINY_GSM_USE_WIFI false
define GSM_PIN ""
// Your GPRS credentials, if any const char apn[] = "telstra.wap"; const char gprsUser[] = ""; const char gprsPass[] = "";
// Your WiFi connection credentials, if applicable const char wifiSSID[] = "Never_Gonna_Give_You_Up"; const char wifiPass[] = "beezChurger";
// Server details
// #define DUMP_AT_COMMANDS // #define TINY_GSM_DEBUG Serial
// Range to attempt to autobaud // NOTE: DO NOT AUTOBAUD in production code. Once you've established // communication, set a fixed baud rate using modem.setBaud(#).
define GSM_AUTOBAUD_MIN 9600
define GSM_AUTOBAUD_MAX 115200
// Uncomment this if you want to use SSL // #define USE_SSL
// --------------------------------------------------------------------------------------------------------------------------------------
include
// Just in case someone defined the wrong thing..
if TINY_GSM_USE_GPRS && not defined TINY_GSM_MODEM_HAS_GPRS
undef TINY_GSM_USE_GPRS
undef TINY_GSM_USE_WIFI
define TINY_GSM_USE_GPRS false
define TINY_GSM_USE_WIFI true
endif
if TINY_GSM_USE_WIFI && not defined TINY_GSM_MODEM_HAS_WIFI
undef TINY_GSM_USE_GPRS
undef TINY_GSM_USE_WIFI
define TINY_GSM_USE_GPRS true
define TINY_GSM_USE_WIFI false
endif
ifdef DUMP_AT_COMMANDS
include
StreamDebugger debugger(SerialAT, Serial); TinyGsm modem(debugger);
else
TinyGsm modem(SerialAT);
endif
TinyGsmClient client(modem);
String modemName = ""; String modemInfo = "";
void setup() { Serial.begin(115200); Serial.println(); Serial.println("----------------------------------------------------");
setupModem();
char server[] = "techmo.unity.chickenkiller.com"; int port = 80;
getServerResponse(server, port); Serial.println("Done"); Serial.println(); Serial.println(); Serial.println(); Serial.println(getServerResponse(server, port)); }
void loop() {}
void setupModem() { // Set GSM module baud rate //TinyGsmAutoBaud(SerialAT, GSM_AUTOBAUD_MIN, GSM_AUTOBAUD_MAX); SerialAT.begin(9600); pinMode(PWRKEY, OUTPUT); digitalWrite(PWRKEY, HIGH); delay(260); digitalWrite(PWRKEY, LOW); delay(10000);
// Restart takes quite some time // To skip it, call init() instead of restart() Serial.println("Initializing modem..."); if (!modem.restart()) { //if (!modem.init(180000L)) { DBG("Failed to restart modem, delaying 10s and retrying"); // restart autobaud in case GSM just rebooted // TinyGsmAutoBaud(SerialAT, GSM_AUTOBAUD_MIN, GSM_AUTOBAUD_MAX); return; }
modemName = modem.getModemName(); modemInfo = modem.getModemInfo();
if TINY_GSM_USE_GPRS
// Unlock your SIM card with a PIN if needed if ((GSM_PIN != "") && modem.getSimStatus() != 3) { modem.simUnlock(GSM_PIN); }
endif
}
void startServerComms() {
if TINY_GSM_USE_WIFI
// Wifi connection parameters must be set before waiting for the network if (!modem.networkConnect(wifiSSID, wifiPass)) { Serial.println("Could not set SSID/Password"); return; }
endif
if TINY_GSM_USE_GPRS && defined TINY_GSM_MODEM_XBEE
// The XBee must run the gprsConnect function BEFORE waiting for network! modem.gprsConnect(apn, gprsUser, gprsPass);
endif
if (!modem.waitForNetwork()) { Serial.println("Could not connect to network"); return; }
if (modem.isNetworkConnected()) { Serial.println("Network connected"); }
if TINY_GSM_USE_GPRS
// GPRS connection parameters are usually set after network registration if (!modem.gprsConnect(apn, gprsUser, gprsPass)) { Serial.println("Failed to connect to " + String(apn)); return; }
if (modem.isGprsConnected()) { Serial.println("GPRS connected"); }
endif
}
bool isServerConnected = false; String getServerResponse(String server, int port, char resource[]) { char tempServer[128]; server.toCharArray(tempServer,server.length()); return getServerResponse(tempServer,port,"/"); } String getServerResponse(String server, int port) { return getServerResponse(server,port,"/"); } String getServerResponse(char server[], int port) { return getServerResponse(server, port, "/"); } String getServerResponse(char server[], int port, char resource[]) { Serial.println("Connecting to: " + String(server) + ":" + String(port)); if (!isServerConnected) {startServerComms(); isServerConnected=true;}
if (!client.connect(server, port)) { Serial.println("Failed to connect to " + String(server)); delay(10000); return; }
// Make a HTTP GET request: Serial.println("Performing HTTP GET request..."); client.print(String("GET ") + resource + " HTTP/1.1\r\n"); client.print(String("Host: ") + server + "\r\n"); client.print(String("Accept: /") + "\r\n"); client.print("Connection: close\r\n\r\n"); client.println();
Serial.println("Awaiting response..."); String result = ""; uint32_t timeout = millis(); while (client.connected() && millis() - timeout < 10000L) { // Print available data while (client.available()) { char c = client.read(); result += c; timeout = millis(); } }
client.flush(); client.stop();
//Serial.println("Response from server: " + result); delay(1000);
int temp_start = result.indexOf("Location: http://"); if (temp_start != -1) { String redirectData = result.substring(temp_start,result.length()); if (redirectData.indexOf("\n") != -1) { redirectData = redirectData.substring(0,redirectData.indexOf("\n")); }
/ /Serial.println("Orig: " + redirectData); / /Serial.println("Orig - 1: " + redirectData.substring(0,redirectData.length()-1)); / /Serial.println("Orig - 2: " + redirectData.substring(0,redirectData.length()-2)); / /Serial.println(); / /Serial.println("Orig: " + redirectData); / /Serial.println("Orig - 1: " + redirectData.substring(1,redirectData.length())); / /Serial.println("Orig - 2: " + redirectData.substring(2,redirectData.length())); / /Serial.println("---------------------------------");
}
isServerConnected = false; return result; }`
It seems to operate just fine normally. But in the case where a redirect is called (Such as in the case of my private server), when the function loops around to connect to a different address, it seems to fail on the actual connecting phase:
if (!client.connect(server, port)) {The output looks like this: ` 11:13:02.848 -> 11:13:02.848 -> ---------------------------------------------------- 11:13:13.096 -> Initializing modem... 11:13:44.591 -> Connecting to: MY_IP_ADDRESS:PORT_NUMBER 11:13:44.695 -> Network connected 11:13:46.655 -> GPRS connected 11:13:47.404 -> Performing HTTP GET request... 11:13:47.816 -> Awaiting response... 11:13:49.543 -> Done 11:13:49.543 -> 11:13:49.543 -> 11:13:49.543 -> 11:13:49.543 -> Connecting to: MY_IP_ADDRESS:PORT_NUMBER 11:13:49.612 -> Network connected 11:13:51.935 -> GPRS connected 11:13:52.696 -> Performing HTTP GET request... 11:13:53.109 -> Awaiting response... 11:13:55.136 -> Detected redirect to: MY_REDIRECTED_IP_ADDRESS:PORT_NUMBER 11:13:55.136 -> Connecting to: MY_REDIRECTED_IP_ADDRESS:PORT_NUMBER 11:15:10.136 -> Failed to connect to MY_REDIRECTED_IP_ADDRESS
`
(I have edited out my public IP address for obvious reasons)
I'm just not sure what I'm missing, probably something I have forgotten to shut down? The code seems to be SO CLOSE to working, but the moment I try connecting to a different web address, it refuses to connect. It will connect once perfectly, then not again until I reboot the arduino or upload the same code to it again. Any help would be appreciated!