Tijl Goens / Mbed OS EpaperdisplayII

tempcommit 13/05

Esp8266.cpp@2:048e163245b7, 2019-05-15 (annotated)

Committer:
tijl
Date:
Wed May 15 13:39:22 2019 +0000
Revision:
2:048e163245b7
Parent:
1:63664175e603 
blub 15/05;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tijl 1:63664175e603 1 #include "Esp8266.h"
tijl 1:63664175e603 2 #include <vector>
tijl 1:63664175e603 3 using namespace std;
tijl 1:63664175e603 4
tijl 1:63664175e603 5 Esp8266::Esp8266(PinName TX, PinName RX, int BaudRate, PinName ResetPin, PinName ChipSelect) {
tijl 1:63664175e603 6 rst = new DigitalOut(ResetPin);
tijl 1:63664175e603 7 cs = new DigitalOut(ChipSelect);
tijl 1:63664175e603 8 setupModule(TX, RX, BaudRate);
tijl 1:63664175e603 9 }
tijl 1:63664175e603 10
tijl 1:63664175e603 11 void Esp8266::setupModule(PinName TX, PinName RX, int BaudRate) {
tijl 1:63664175e603 12 cs->write(1);
tijl 1:63664175e603 13 serial = new UARTSerial(TX, RX, BaudRate);
tijl 1:63664175e603 14 parser = new ATCmdParser(serial);
tijl 1:63664175e603 15 parser->debug_on(0);
tijl 1:63664175e603 16 parser->set_delimiter("\r\n");
tijl 1:63664175e603 17 cs->write(0);
tijl 1:63664175e603 18 }
tijl 1:63664175e603 19
tijl 1:63664175e603 20 void Esp8266::toggleResetPin(void) {
tijl 1:63664175e603 21 rst->write(0);
tijl 1:63664175e603 22 wait(0.01);
tijl 1:63664175e603 23 rst->write(1);
tijl 1:63664175e603 24 }
tijl 1:63664175e603 25
tijl 1:63664175e603 26 void Esp8266::setModuleMode(int Mode) {
tijl 1:63664175e603 27 cs->write(1);
tijl 1:63664175e603 28 toggleResetPin();
tijl 1:63664175e603 29 bool processed = false;
tijl 1:63664175e603 30 do {
tijl 1:63664175e603 31 processed = parser->send("AT+CWMODE=%d", Mode) && parser->recv("OK");
tijl 1:63664175e603 32 }
tijl 1:63664175e603 33 while(processed == false);
tijl 1:63664175e603 34 }
tijl 1:63664175e603 35
tijl 1:63664175e603 36 void Esp8266::connectToAP(const char* SSID, const char* Password) {
tijl 1:63664175e603 37 bool processed = false;
tijl 1:63664175e603 38 do {
tijl 1:63664175e603 39 processed = parser->send("AT+CWJAP_CUR=\"%s\",\"%s\"", SSID, Password) && parser->recv("OK");
tijl 1:63664175e603 40 }
tijl 1:63664175e603 41 while(processed == false);
tijl 1:63664175e603 42 }
tijl 1:63664175e603 43
tijl 2:048e163245b7 44 string Esp8266::getRequest(const char* TCPorUDP, const char* Server, int Port, const char* ConnectionString, bool stayAlive) {
tijl 1:63664175e603 45 bool processed = false;
tijl 1:63664175e603 46 do {
tijl 1:63664175e603 47 processed = parser->send("AT+CIPSTART=\"%s\",\"%s\",%d", TCPorUDP, Server, Port) && parser->recv("OK");
tijl 1:63664175e603 48 }
tijl 1:63664175e603 49 while(processed == false);
tijl 1:63664175e603 50
tijl 1:63664175e603 51 string con = "GET ";
tijl 1:63664175e603 52 con.append(ConnectionString);
tijl 1:63664175e603 53 con.append(" HTTP/1.1\r\nHost: ");
tijl 1:63664175e603 54 con.append(Server);
tijl 1:63664175e603 55 con.append("\r\n\r\n");
tijl 1:63664175e603 56
tijl 1:63664175e603 57 do {
tijl 1:63664175e603 58 processed = parser->send("AT+CIPSEND=%d", con.length()) && parser->recv("OK");
tijl 1:63664175e603 59 }
tijl 1:63664175e603 60 while(processed == false);
tijl 1:63664175e603 61
tijl 1:63664175e603 62 parser->send("%s", con.c_str());
tijl 2:048e163245b7 63 if(!stayAlive) {
tijl 2:048e163245b7 64 closeConnection();
tijl 2:048e163245b7 65 }
tijl 1:63664175e603 66 return getJsonString();
tijl 1:63664175e603 67 }
tijl 1:63664175e603 68
tijl 1:63664175e603 69 void Esp8266::closeConnection(void) {
tijl 1:63664175e603 70 bool processed = false;
tijl 1:63664175e603 71 do {
tijl 1:63664175e603 72 processed = parser->send("AT+CIPCLOSE");
tijl 1:63664175e603 73 }
tijl 1:63664175e603 74 while(processed == false);
tijl 1:63664175e603 75 }
tijl 1:63664175e603 76
tijl 1:63664175e603 77 string Esp8266::getJsonString(void) {
tijl 1:63664175e603 78 char previousChar = ' ';
tijl 1:63664175e603 79 char presentChar = ' ';
tijl 1:63664175e603 80 bool startOfJSON = false;
tijl 1:63664175e603 81
tijl 1:63664175e603 82 string resp = "";
tijl 1:63664175e603 83
tijl 1:63664175e603 84 while(1) {
tijl 1:63664175e603 85 presentChar = (char)parser->getc();
tijl 2:048e163245b7 86
tijl 1:63664175e603 87 if(presentChar == '{' && previousChar == '[') {
tijl 1:63664175e603 88 startOfJSON = true;
tijl 1:63664175e603 89 }
tijl 1:63664175e603 90
tijl 1:63664175e603 91 if(startOfJSON) {
tijl 1:63664175e603 92 resp += presentChar;
tijl 1:63664175e603 93 }
tijl 1:63664175e603 94
tijl 1:63664175e603 95 if(presentChar == ']' && previousChar == '}') {
tijl 1:63664175e603 96 break;
tijl 1:63664175e603 97 }
tijl 1:63664175e603 98
tijl 1:63664175e603 99 previousChar = presentChar;
tijl 1:63664175e603 100 }
tijl 1:63664175e603 101
tijl 1:63664175e603 102 cs->write(0);
tijl 1:63664175e603 103 return resp;
tijl 1:63664175e603 104 }
tijl 1:63664175e603 105
tijl 1:63664175e603 106 vector<string> Esp8266::processJsonString(string response) {
tijl 1:63664175e603 107 vector<string> jsonStrings;
tijl 1:63664175e603 108 response = response.substr(0, response.length()-1);
tijl 1:63664175e603 109
tijl 1:63664175e603 110 int delimiterPlace = 0;
tijl 1:63664175e603 111 do {
tijl 1:63664175e603 112 delimiterPlace = response.find("},{")-2;
tijl 1:63664175e603 113 string sub;
tijl 1:63664175e603 114 if(delimiterPlace < 0) {
tijl 1:63664175e603 115 if(response[0] != '{')
tijl 1:63664175e603 116 sub = response.substr(2, response.length()-3);
tijl 1:63664175e603 117 else
tijl 1:63664175e603 118 sub = response.substr(1, response.length()-2);
tijl 1:63664175e603 119
tijl 1:63664175e603 120 jsonStrings.push_back(sub);
tijl 1:63664175e603 121 break;
tijl 1:63664175e603 122 }
tijl 1:63664175e603 123 else {
tijl 1:63664175e603 124 sub = response.substr(1, delimiterPlace+1);
tijl 1:63664175e603 125 jsonStrings.push_back(sub);
tijl 1:63664175e603 126 response.erase(0, delimiterPlace+4);
tijl 1:63664175e603 127 }
tijl 1:63664175e603 128 }
tijl 1:63664175e603 129 while(delimiterPlace > 0);
tijl 1:63664175e603 130
tijl 1:63664175e603 131 return jsonStrings;
tijl 1:63664175e603 132 }