A smart HTTP & FTP library based on Seeeduino that implements the AT HTTP commands to perform GET and POST requests to a JSON API as well as FTP uploads.

• Your board has to support the standard SoftwareSerial library. It doesn't work with HardwareSerial based boards for the moment.
• The API response format has to be a valid JSON.
• The library has been tested against Arduino Uno and Arduino Nano.

Download the ZIP library and then import it: Sketch -> Include Library -> Add .ZIP Library ...

How to do a GET request! 👍

unsigned int RX_PIN = 7; unsigned int TX_PIN = 8; unsigned int RST_PIN = 12; const char BEARER[] PROGMEM = "gprs-service.com"; HTTP http(9600, RX_PIN, TX_PIN, RST_PIN); http.connect(BEARER); char response[256]; Result result = http.get("your.api.com", response); Serial.println(response); http.disconnect(); 

How to do a POST request! 👍

unsigned int RX_PIN = 7; unsigned int TX_PIN = 8; unsigned int RST_PIN = 12; const char BEARER[] PROGMEM = "gprs-service.com"; HTTP http(9600, RX_PIN, TX_PIN, RST_PIN); http.connect(BEARER); char response[256]; Result result = http.post("your.api.com", "{\"date\":\"12345678\"}", response); Serial.println(response); http.disconnect();

How to do a FTP upload! 👍

unsigned int RX_PIN = 7; unsigned int TX_PIN = 8; unsigned int RST_PIN = 12; const char BEARER[] PROGMEM = "gprs-service.com"; const char FTP_SERVER[] PROGMEM = "ftp.server"; const char FTP_USER[] PROGMEM = "user"; const char FTP_PASS[] PROGMEM = "pass"; FTP ftp(9600, RX_PIN, TX_PIN, RST_PIN); ftp.putBegin(BEARER, "example.txt", FTP_SERVER, FTP_USER, FTP_PASS); ftp.putWrite("hello!", sizeof("hello!")); ftp.putEnd(); 

I suggest the ArduinoJSON library for parsing the JSON response, then you can play with the values easily.

In order to perform a request, the library follows these steps:

• AT+CREG? -> try until 0,1 (connected to the network)
• AT+SAPBR=3,1,"Contype","GPRS" -> wait for OK
• AT+SAPBR=3,1,"APN","movistar.es" -> wait for OK
• AT+SAPBR=1,1 -> wait for OK

• AT+HTTPINIT -> wait for OK
• AT+HTTPPARA="CID",1 -> wait for OK
• AT+HTTPPARA="URL","your.api.com"-> wait for OK
• AT+HTTPSSL=0 -> wait for OK (1 when URL starts with "https://")
• AT+HTTPACTION=0 -> wait for 200
• AT+HTTPREAD -> read buffer and parse it
• AT+HTTPTERM -> wait for OK
• AT+SAPBR=0,1

• AT+HTTPINIT -> wait for OK
• AT+HTTPPARA="CID",1 -> wait for OK
• AT+HTTPPARA="URL","your.api.com" -> wait for OK

For example, if we have this body: {"location_id": 238, "fill_percent": 90}

• AT+HTTPPARA="CONTENT","application/json"
• AT+HTTPDATA=strlen(body),10000 -> wait for DOWNLOAD, then write the body and wait 10000
• AT+HTTPSSL=0 -> wait for OK (1 when URL starts with "https://")
• AT+HTTPACTION=1 -> wait for ,200,
• AT+HTTPREAD -> read buffer and parse it
• AT+HTTPTERM -> wait for OK
• AT+SAPBR=0,1

• Support of HardwareSerial.
• Support of more content types, not only JSON (application/json).

• Lint: cppcheck --enable=all .