Franz Pucher / Mbed 2 deprecated ESP8266_HTTP_MQTT_Server

M0 communication to configurable-Web-Server (MQTT) Version 0.1

Dependencies:   LM75B mbed

Siehe auch FTKL-Tagung 2016

main.cpp@2:63135b94c898, 2018-01-14 (annotated)

Committer:
fpucher
Date:
Sun Jan 14 19:49:08 2018 +0000
Revision:
2:63135b94c898
Parent:
1:b9fd13f34c2d
Child:
3:c14eb9159a88
New Program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
fpucher 2:63135b94c898 1 #include "mbed.h"
fpucher 2:63135b94c898 2 #include <stdio.h>
fpucher 2:63135b94c898 3 #include <string>
fpucher 2:63135b94c898 4 //using namespace std;
fpucher 0:d764cafa5989 5
fpucher 1:b9fd13f34c2d 6 DigitalOut LedD1(LED1);
fpucher 1:b9fd13f34c2d 7 DigitalOut LedD2(LED2);
fpucher 1:b9fd13f34c2d 8 DigitalOut LedD3(LED3);
fpucher 1:b9fd13f34c2d 9 DigitalOut LedD4(LED4);
fpucher 2:63135b94c898 10 AnalogIn poti1(p19);
fpucher 2:63135b94c898 11 AnalogIn poti2(p20);
fpucher 2:63135b94c898 12
fpucher 0:d764cafa5989 13
fpucher 1:b9fd13f34c2d 14 //Serial wifi(P1_0, P0_20); // Bertl
fpucher 1:b9fd13f34c2d 15 Serial wifi(p9, p10); // M0
fpucher 0:d764cafa5989 16 Serial pc(USBTX, USBRX);
fpucher 2:63135b94c898 17 char recChar=0;
fpucher 2:63135b94c898 18 bool recFlag=false;
fpucher 0:d764cafa5989 19
fpucher 2:63135b94c898 20 //string fromEsp8266 = "Arduino_SD041";
fpucher 2:63135b94c898 21 string fromEsp8266 = "";
fpucher 2:63135b94c898 22 string toEsp8266 = "";
fpucher 2:63135b94c898 23 string periodicMsg="";
fpucher 2:63135b94c898 24 long lastMsg = 0;
fpucher 2:63135b94c898 25 int url_decode(char *encoded_str, char *decoded_str);
fpucher 0:d764cafa5989 26
fpucher 2:63135b94c898 27 string getPoti(char potiNo) {
fpucher 2:63135b94c898 28 char pValStr[20] = "ME-01";
fpucher 2:63135b94c898 29 int n=-1;
fpucher 2:63135b94c898 30 // pc.printf("Poti %c selected\r\n", potiNo);
fpucher 2:63135b94c898 31 if (potiNo == '1')
fpucher 2:63135b94c898 32 n = sprintf(pValStr, "%d", poti1.read_u16());
fpucher 2:63135b94c898 33 else if (potiNo == '2')
fpucher 2:63135b94c898 34 n = sprintf(pValStr, "%d", poti2.read_u16());
fpucher 2:63135b94c898 35 if (n<=0)
fpucher 2:63135b94c898 36 sprintf(pValStr, "ME01");
fpucher 2:63135b94c898 37
fpucher 2:63135b94c898 38 pc.printf("Wert von Poti %c: %s\r\n", potiNo, pValStr);
fpucher 2:63135b94c898 39 //mcu.printf("_P%c:%s\r", potiNo, pValStr);
fpucher 2:63135b94c898 40 return pValStr;
fpucher 2:63135b94c898 41 }
fpucher 0:d764cafa5989 42
fpucher 2:63135b94c898 43 // Process Requests from ESP8266
fpucher 2:63135b94c898 44 void ReadAndProcessRequests() {
fpucher 2:63135b94c898 45 int chan,state,button;
fpucher 2:63135b94c898 46 float Ain;
fpucher 2:63135b94c898 47 char szAin[20],szT[200];
fpucher 2:63135b94c898 48 string poti;
fpucher 2:63135b94c898 49
fpucher 2:63135b94c898 50 // while(1) {
fpucher 2:63135b94c898 51 //char inChar = 'A'; // get the new byte
fpucher 2:63135b94c898 52 //if (inChar != '\n') {
fpucher 2:63135b94c898 53 // fromEsp8266 += inChar; // add it to receive string
fpucher 2:63135b94c898 54 //}
fpucher 2:63135b94c898 55 //else
fpucher 2:63135b94c898 56 // while(wifi.readable()) {
fpucher 2:63135b94c898 57 // char inChar = (char)wifi.getc(); // get the new byte
fpucher 2:63135b94c898 58 // if (inChar != '\n') {
fpucher 2:63135b94c898 59 // fromEsp8266 += inChar; // add it to receive string
fpucher 2:63135b94c898 60 // }
fpucher 2:63135b94c898 61 // process string if end of line
fpucher 2:63135b94c898 62 if(fromEsp8266.substr(0,8)=="Arduino_") { // Valid command from ESP8266?
fpucher 2:63135b94c898 63 if(fromEsp8266.substr(8,2) == "SM") { // Set Digital if true
fpucher 2:63135b94c898 64 // --- Build Reply String -----------------------------------------------
fpucher 2:63135b94c898 65 toEsp8266 = "Echoing your message: ";
fpucher 2:63135b94c898 66 toEsp8266 += fromEsp8266.substr(10,50);
fpucher 2:63135b94c898 67 wifi.printf("%s\n", toEsp8266);
fpucher 2:63135b94c898 68 // ---- Set Periodic Message String -------------------------------------
fpucher 2:63135b94c898 69 url_decode((char *)toEsp8266.c_str(), (char *)szT );
fpucher 2:63135b94c898 70 periodicMsg = szT;
fpucher 2:63135b94c898 71 }
fpucher 2:63135b94c898 72 else if(fromEsp8266.substr(8,2) == "SD") { // Set Digital if true
fpucher 2:63135b94c898 73 // --- Build Reply String -----------------------------------------------
fpucher 2:63135b94c898 74 toEsp8266 = "Digital Channel ";
fpucher 2:63135b94c898 75 toEsp8266 += fromEsp8266.substr(10,2); //Digital Channel
fpucher 2:63135b94c898 76 toEsp8266 += " is ";
fpucher 2:63135b94c898 77 toEsp8266 += (fromEsp8266.substr(12,1)=="0") ? "LO" : "HI";
fpucher 2:63135b94c898 78 // ---- Send Reply String -----------------------------------------------
fpucher 2:63135b94c898 79 //toEspprintf(toEsp8266); // Send Reply String to ESP8266
fpucher 2:63135b94c898 80 //pc.printf("%s\n", toEsp8266); // Send Reply String to Console
fpucher 2:63135b94c898 81 wifi.printf("%s\n", toEsp8266); // Send Reply String to Console
fpucher 2:63135b94c898 82 // if(wifi.writeable()) {
fpucher 2:63135b94c898 83 // wifi.printf("%s\n", toEsp8266);
fpucher 2:63135b94c898 84 // }
fpucher 2:63135b94c898 85 // --- Set Digital Channel State ----------------------------------------
fpucher 2:63135b94c898 86 chan = atoi(fromEsp8266.substr(10,2).c_str());
fpucher 2:63135b94c898 87 state = atoi(fromEsp8266.substr(12,1).c_str());
fpucher 2:63135b94c898 88 //digitalWrite(chan, state); // Set Digital Output per request
fpucher 2:63135b94c898 89 //pc.printf("\nSTATE= ");
fpucher 2:63135b94c898 90 //pc.printf("%d", state);
fpucher 2:63135b94c898 91 LedD4 = state;
fpucher 2:63135b94c898 92 }
fpucher 2:63135b94c898 93 else if(fromEsp8266.substr(8,2) == "GD") { // Get Digital if true
fpucher 2:63135b94c898 94 // --- Get Digital Channel State ----------------------------------------
fpucher 2:63135b94c898 95 chan = atoi(fromEsp8266.substr(10,2).c_str());
fpucher 2:63135b94c898 96 state = LedD4.read(); // Set Digital Output per request
fpucher 2:63135b94c898 97 // --- Build Reply String -----------------------------------------------
fpucher 2:63135b94c898 98 toEsp8266 = "Digital Channel ";
fpucher 2:63135b94c898 99 toEsp8266 += fromEsp8266.substr(10,2); //Digital Channel
fpucher 2:63135b94c898 100 toEsp8266 += " is ";
fpucher 2:63135b94c898 101 toEsp8266 += (state==0) ? "LO" : "HI";
fpucher 2:63135b94c898 102 // ---- Send Reply String -----------------------------------------------
fpucher 2:63135b94c898 103 //toEspprintf(toEsp8266); // Send Reply String to ESP8266
fpucher 2:63135b94c898 104 wifi.printf("%s\n",toEsp8266); // Send Reply String to ESP
fpucher 2:63135b94c898 105 }
fpucher 2:63135b94c898 106 else if(fromEsp8266.substr(8,2) == "GA") { // Get Analog if true
fpucher 2:63135b94c898 107 // --- Get Analog Channel Reading ---------------------------------------
fpucher 2:63135b94c898 108 chan = atoi(fromEsp8266.substr(10,2).c_str());
fpucher 2:63135b94c898 109 //Ain = 0.0048828 * (float) analogRead(chan); // Read analog input
fpucher 2:63135b94c898 110 //ftoa(Ain,szAin, 2);
fpucher 2:63135b94c898 111 poti = getPoti('1');
fpucher 2:63135b94c898 112 // --- Build Reply String -----------------------------------------------
fpucher 2:63135b94c898 113 //toEsp8266 = "Analog Channel ";
fpucher 2:63135b94c898 114 toEsp8266 = "Poti 1 ";
fpucher 2:63135b94c898 115 // toEsp8266 += fromEsp8266.substr(10,2); //Analog Channel
fpucher 2:63135b94c898 116 toEsp8266 += " is ";
fpucher 2:63135b94c898 117 toEsp8266 += poti; //string(szAin);
fpucher 2:63135b94c898 118 // ---- Send Reply String -----------------------------------------------
fpucher 2:63135b94c898 119 //toEspprintf(toEsp8266); // Send Reply String to ESP8266
fpucher 2:63135b94c898 120 wifi.printf("%s\n",toEsp8266); // Send Reply String to Console
fpucher 2:63135b94c898 121 }
fpucher 2:63135b94c898 122 else {
fpucher 2:63135b94c898 123 // ---- Send Reply String -----------------------------------------------
fpucher 2:63135b94c898 124 toEsp8266 = "Arduino does not recognize request.";
fpucher 2:63135b94c898 125 //toEspprintf(toEsp8266); // Send Reply String to ESP8266
fpucher 2:63135b94c898 126 //pc.printf("%s\n", toEsp8266); // Send Reply String to Console
fpucher 2:63135b94c898 127 wifi.printf("%s\n", toEsp8266); // Send Reply String to Console
fpucher 2:63135b94c898 128 }
fpucher 2:63135b94c898 129 }
fpucher 2:63135b94c898 130 fromEsp8266 = "";
fpucher 2:63135b94c898 131 //toEspSerial.flush();
fpucher 2:63135b94c898 132 // }
fpucher 2:63135b94c898 133 // }
fpucher 2:63135b94c898 134 }
fpucher 2:63135b94c898 135
fpucher 2:63135b94c898 136 /********************************************************
fpucher 2:63135b94c898 137 * URL Message Decoder
fpucher 2:63135b94c898 138 ********************************************************/
fpucher 2:63135b94c898 139
fpucher 2:63135b94c898 140 int url_decode(char *encoded_str, char *decoded_str) {
fpucher 2:63135b94c898 141
fpucher 2:63135b94c898 142 // While we're not at the end of the string (current character not NULL)
fpucher 2:63135b94c898 143 while (*encoded_str) {
fpucher 2:63135b94c898 144 // Check to see if the current character is a %
fpucher 2:63135b94c898 145 if (*encoded_str == '%') {
fpucher 2:63135b94c898 146
fpucher 2:63135b94c898 147 // Grab the next two characters and move encoded_str forwards
fpucher 2:63135b94c898 148 encoded_str++;
fpucher 2:63135b94c898 149 char high = *encoded_str;
fpucher 2:63135b94c898 150 encoded_str++;
fpucher 2:63135b94c898 151 char low = *encoded_str;
fpucher 2:63135b94c898 152
fpucher 2:63135b94c898 153 // Convert ASCII 0-9A-F to a value 0-15
fpucher 2:63135b94c898 154 if (high > 0x39) high -= 7;
fpucher 2:63135b94c898 155 high &= 0x0f;
fpucher 2:63135b94c898 156
fpucher 2:63135b94c898 157 // Same again for the low byte:
fpucher 2:63135b94c898 158 if (low > 0x39) low -= 7;
fpucher 2:63135b94c898 159 low &= 0x0f;
fpucher 2:63135b94c898 160
fpucher 2:63135b94c898 161 // Combine the two into a single byte and store in decoded_str:
fpucher 2:63135b94c898 162 *decoded_str = (high << 4) | low;
fpucher 2:63135b94c898 163 } else {
fpucher 2:63135b94c898 164 // All other characters copy verbatim
fpucher 2:63135b94c898 165 *decoded_str = *encoded_str;
fpucher 0:d764cafa5989 166 }
fpucher 2:63135b94c898 167
fpucher 2:63135b94c898 168 // Move both pointers to the next character:
fpucher 2:63135b94c898 169 encoded_str++;
fpucher 2:63135b94c898 170 decoded_str++;
fpucher 2:63135b94c898 171 }
fpucher 2:63135b94c898 172 // Terminate the new string with a NULL character to trim it off
fpucher 2:63135b94c898 173 *decoded_str = 0;
fpucher 2:63135b94c898 174 return 0;
fpucher 2:63135b94c898 175 }
fpucher 2:63135b94c898 176 void flushSerialBuffer() {
fpucher 2:63135b94c898 177 while (wifi.readable()) {
fpucher 2:63135b94c898 178 wifi.getc();
fpucher 2:63135b94c898 179 }
fpucher 2:63135b94c898 180 }
fpucher 2:63135b94c898 181
fpucher 2:63135b94c898 182 bool semi = false;
fpucher 2:63135b94c898 183 bool blank = false;
fpucher 2:63135b94c898 184
fpucher 2:63135b94c898 185 void readData() {
fpucher 2:63135b94c898 186 recChar = wifi.getc();
fpucher 2:63135b94c898 187 if (recChar != '\n') {
fpucher 2:63135b94c898 188 if(recChar != ':') semi = true;
fpucher 2:63135b94c898 189 if(semi && (recChar != ' ')) blank = true;
fpucher 2:63135b94c898 190 if(semi && blank)
fpucher 2:63135b94c898 191 fromEsp8266 += recChar; // add it to receive string
fpucher 2:63135b94c898 192 }
fpucher 2:63135b94c898 193 else {
fpucher 2:63135b94c898 194 recFlag = true;
fpucher 2:63135b94c898 195 semi = false; blank = false;
fpucher 2:63135b94c898 196 flushSerialBuffer();
fpucher 2:63135b94c898 197 }
fpucher 2:63135b94c898 198 }
fpucher 2:63135b94c898 199 int main() {
fpucher 2:63135b94c898 200 pc.baud(115200);
fpucher 2:63135b94c898 201 wifi.baud(115200);
fpucher 2:63135b94c898 202 pc.printf("\f\n\r-------------ESP8266 Arduino -------------\n\r");
fpucher 2:63135b94c898 203 wifi.attach(&readData);
fpucher 2:63135b94c898 204 //wifi.printf("Hello WIFI\n");
fpucher 2:63135b94c898 205 while(1) {
fpucher 2:63135b94c898 206 if(recFlag) {
fpucher 2:63135b94c898 207 pc.printf("readData: %s\n", fromEsp8266);
fpucher 2:63135b94c898 208 //fromEsp8266 = "Arduino_SD041";
fpucher 2:63135b94c898 209 ReadAndProcessRequests();
fpucher 2:63135b94c898 210 recFlag=false;
fpucher 2:63135b94c898 211 }
fpucher 2:63135b94c898 212 LedD1 = 1;
fpucher 2:63135b94c898 213 wait(0.2);
fpucher 2:63135b94c898 214 LedD1 = 0;
fpucher 2:63135b94c898 215 wait(0.2);
fpucher 2:63135b94c898 216 }
fpucher 2:63135b94c898 217 }