Created
October 5, 2017 09:16
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Sketch for using raw AT commands on a Seed Studio GPRS Shield with a Hologram.io SIM
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| /* | |
| Note: this code is a demo for how to use a gprs shield to send | |
| an http request to a test website (using the Hologram APN). | |
| To communicate with the Arduino via terminal, set | |
| the outgoing baud rate to 19200, and set line endings to | |
| carriage return. | |
| Then, in order to initiate the demo http request, enter | |
| 'h' into the terminal at the top of the serial monitor. | |
| */ | |
| #include <SoftwareSerial.h> | |
| SoftwareSerial mySerial(7, 8); | |
| void setup() | |
| { | |
| mySerial.begin(19200); // the GPRS baud rate | |
| Serial.begin(19200); // the GPRS baud rate | |
| delay(500); | |
| } | |
| void loop() | |
| { | |
| // Input 'h' to run the test HTTP program | |
| if (Serial.available()) | |
| switch(Serial.read()) | |
| { | |
| case 'h': | |
| SubmitHttpRequest(); | |
| break; | |
| } | |
| if (mySerial.available()) | |
| Serial.write(mySerial.read()); | |
| } | |
| // SubmitHttpRequest() | |
| // | |
| // Note: the time of the delays are very important | |
| void SubmitHttpRequest() | |
| { | |
| // Query signal strength of device | |
| mySerial.println("AT+CSQ"); | |
| delay(100); | |
| ShowSerialData(); | |
| // Check the status of Packet service attach. '0' implies device is not attached and '1' implies device is attached. | |
| mySerial.println("AT+CGATT?"); | |
| delay(100); | |
| ShowSerialData(); | |
| // Set the SAPBR, the connection type is using gprs | |
| mySerial.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\""); | |
| delay(1000); | |
| ShowSerialData(); | |
| // Set the APN | |
| mySerial.println("AT+SAPBR=3,1,\"APN\",\"hologram\""); | |
| delay(4000); | |
| ShowSerialData(); | |
| // Set the SAPBR, for detail you can refer to the AT command manual | |
| mySerial.println("AT+SAPBR=1,1"); | |
| delay(2000); | |
| ShowSerialData(); | |
| // Init the HTTP request | |
| mySerial.println("AT+HTTPINIT"); | |
| delay(2000); | |
| ShowSerialData(); | |
| // Set HTTP params, the second param is the website to request | |
| mySerial.println("AT+HTTPPARA=\"URL\",\"hologram.io/test.html\""); | |
| delay(1000); | |
| ShowSerialData(); | |
| //Set the context ID | |
| mySerial.println("AT+HTTPPARA=\"CID\",1"); | |
| delay(1000); | |
| ShowSerialData(); | |
| // Submit the request | |
| mySerial.println("AT+HTTPACTION=0"); | |
| // The delay is very important, the delay time is base on the | |
| // return time from the website, if the return data is very | |
| // large, the time required might be longer. | |
| delay(10000); | |
| ShowSerialData(); | |
| // Read the data from the accessed website | |
| mySerial.println("AT+HTTPREAD"); | |
| delay(10000); | |
| ShowSerialData(); | |
| // Close the HTTP connection and display the data | |
| mySerial.println("AT+HTTPTERM"); | |
| delay(100); | |
| } | |
| // ShowSerialData() | |
| // This is to show the data from gprs shield, to help | |
| // see how the gprs shield submits an http request. | |
| void ShowSerialData() | |
| { | |
| while(mySerial.available()!=0) | |
| Serial.write(mySerial.read()); | |
| } |
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Nice code...help a lot getting my sim900 GPRS http to work...I've been pulling my hair on how to send custom build url with get variable to send using
mySerial.println("AT+HTTPPARA=\"URL\",\"hologram.io/test.html\"");this is my function
void sim900aSendHttp() { ATcomm = "AT+HTTPPARA=\"URL\",\"" ; ATcomm += "http://uumresearch.com/bustracking/update_location.php?busid=" ; ATcomm += String(busid); ATcomm += "&latitude="+String(gps.location.lat(),8); ATcomm += "&longitude="+String(gps.location.lng(),8); ATcomm += "\"" ; Serial.println("BUSID:"+busid+",LAT:"+String(gps.location.lat(),8)+"/LONG:"+String(gps.location.lat(),8); Serial.println(ATcomm); Serial.println(ATcomm); serialSIM800.println(ATcomm); delay(3000); serialSIM800.println("AT+HTTPACTION=0"); delay(8000); Serial.println(ATcomm); }this is the url that I'm building
http://uumresearch.com/bustracking/update_location.php?busid=kdf8860&latitude=6.44505850&longitude=100.42456217it seems that the at command only able to send until
http://uumresearch.com/bustracking/update_location.php?busid=kdf8860i've tested using static url and it works..however when I concat all the variables that i need, it seems unable to perform the HTTPARA AT command