Shane Kirkbride / Mbed 2 deprecated STM-Client

This is a SLIP interface for the STM32F446RE Nucleo Board. It is designed to work specifically with the esp-link software for the ESP8266. The program is an example of a rest command.

Dependencies:   mbed DHT Matrix

main.cpp@0:70a6082c1bf7, 2016-07-14 (annotated)

Committer:
ShaneKirkbride
Date:
Thu Jul 14 20:38:18 2016 +0000
Revision:
0:70a6082c1bf7
Child:
1:99c58a942425
first commit. Rest example working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ShaneKirkbride 0:70a6082c1bf7 1 /**
ShaneKirkbride 0:70a6082c1bf7 2 * Simple example to demo the STM-Client REST calls
ShaneKirkbride 0:70a6082c1bf7 3 */
ShaneKirkbride 0:70a6082c1bf7 4 #include "mbed.h"
ShaneKirkbride 0:70a6082c1bf7 5 #include <STMClient.h>
ShaneKirkbride 0:70a6082c1bf7 6 #include <STMClientRest.h>
ShaneKirkbride 0:70a6082c1bf7 7
ShaneKirkbride 0:70a6082c1bf7 8 /*-------- Check if platform compatible ----------*/
ShaneKirkbride 0:70a6082c1bf7 9 #if DEVICE_SERIAL_ASYNCH
ShaneKirkbride 0:70a6082c1bf7 10 Serial debugSerial(SERIAL_TX, SERIAL_RX);
ShaneKirkbride 0:70a6082c1bf7 11 Serial espSerial(PA_0, PA_1);
ShaneKirkbride 0:70a6082c1bf7 12 #else
ShaneKirkbride 0:70a6082c1bf7 13 #warning "Platform not compatible with Low Power APIs for Serial"
ShaneKirkbride 0:70a6082c1bf7 14 Serial debugSerial(SERIAL_TX, SERIAL_RX);
ShaneKirkbride 0:70a6082c1bf7 15 Serial espSerial(PA_0, PA_1);
ShaneKirkbride 0:70a6082c1bf7 16 #endif
ShaneKirkbride 0:70a6082c1bf7 17
ShaneKirkbride 0:70a6082c1bf7 18
ShaneKirkbride 0:70a6082c1bf7 19 DigitalOut led1(LED1);
ShaneKirkbride 0:70a6082c1bf7 20
ShaneKirkbride 0:70a6082c1bf7 21 // Initialize a connection to esp-link using the normal hardware serial port both for
ShaneKirkbride 0:70a6082c1bf7 22 // SLIP and for debug messages.
ShaneKirkbride 0:70a6082c1bf7 23 STMClient esp(&espSerial, &debugSerial);
ShaneKirkbride 0:70a6082c1bf7 24
ShaneKirkbride 0:70a6082c1bf7 25
ShaneKirkbride 0:70a6082c1bf7 26 // Initialize a REST client on the connection to esp-link
ShaneKirkbride 0:70a6082c1bf7 27 STMClientRest rest(&esp);
ShaneKirkbride 0:70a6082c1bf7 28
ShaneKirkbride 0:70a6082c1bf7 29 bool wifiConnected = false;
ShaneKirkbride 0:70a6082c1bf7 30
ShaneKirkbride 0:70a6082c1bf7 31 // Callback made from esp-link to notify of wifi status changes
ShaneKirkbride 0:70a6082c1bf7 32 // Here we print something out and set a global flag
ShaneKirkbride 0:70a6082c1bf7 33 void wifiCb(void *response) {
ShaneKirkbride 0:70a6082c1bf7 34 debugSerial.printf("waiting for wifi status...\n\r"); //debug
ShaneKirkbride 0:70a6082c1bf7 35 STMClientResponse *res = (STMClientResponse*)response;
ShaneKirkbride 0:70a6082c1bf7 36 if (res->argc() == 1) {
ShaneKirkbride 0:70a6082c1bf7 37 uint8_t status;
ShaneKirkbride 0:70a6082c1bf7 38 res->popArg(&status, 1);
ShaneKirkbride 0:70a6082c1bf7 39 debugSerial.printf("waiting for wifi status...\n\r");
ShaneKirkbride 0:70a6082c1bf7 40 if(status == STATION_GOT_IP) {
ShaneKirkbride 0:70a6082c1bf7 41 debugSerial.printf("WIFI CONNECTED");
ShaneKirkbride 0:70a6082c1bf7 42 wifiConnected = true;
ShaneKirkbride 0:70a6082c1bf7 43 } else {
ShaneKirkbride 0:70a6082c1bf7 44 debugSerial.printf("WIFI NOT READY: %i",status);
ShaneKirkbride 0:70a6082c1bf7 45 //Serial.printf(status);
ShaneKirkbride 0:70a6082c1bf7 46 wifiConnected = false;
ShaneKirkbride 0:70a6082c1bf7 47 }
ShaneKirkbride 0:70a6082c1bf7 48 }
ShaneKirkbride 0:70a6082c1bf7 49 }
ShaneKirkbride 0:70a6082c1bf7 50
ShaneKirkbride 0:70a6082c1bf7 51 #define BUFLEN 266
ShaneKirkbride 0:70a6082c1bf7 52
ShaneKirkbride 0:70a6082c1bf7 53 int loop() {
ShaneKirkbride 0:70a6082c1bf7 54 //debugSerial.printf("begin main loop \n\r");
ShaneKirkbride 0:70a6082c1bf7 55 // process any callbacks coming from esp_link
ShaneKirkbride 0:70a6082c1bf7 56 esp.Process();
ShaneKirkbride 0:70a6082c1bf7 57 debugSerial.printf("Wifi Connected: %i \n\r",wifiConnected);
ShaneKirkbride 0:70a6082c1bf7 58 // if we're connected make an HTTP request
ShaneKirkbride 0:70a6082c1bf7 59 while(wifiConnected) {
ShaneKirkbride 0:70a6082c1bf7 60 // Request /utc/now from the previously set-up server
ShaneKirkbride 0:70a6082c1bf7 61 rest.get("/utc/now");
ShaneKirkbride 0:70a6082c1bf7 62
ShaneKirkbride 0:70a6082c1bf7 63 char response[BUFLEN];
ShaneKirkbride 0:70a6082c1bf7 64 memset(response, 0, BUFLEN);
ShaneKirkbride 0:70a6082c1bf7 65 uint16_t code = rest.waitResponse(response, BUFLEN);
ShaneKirkbride 0:70a6082c1bf7 66 if(code == HTTP_STATUS_OK){
ShaneKirkbride 0:70a6082c1bf7 67 debugSerial.printf("STM: GET successful: %s\n\r", response);
ShaneKirkbride 0:70a6082c1bf7 68 } else {
ShaneKirkbride 0:70a6082c1bf7 69 debugSerial.printf("STM: GET failed: %i\n\r",code);
ShaneKirkbride 0:70a6082c1bf7 70 return code;
ShaneKirkbride 0:70a6082c1bf7 71 }
ShaneKirkbride 0:70a6082c1bf7 72 wait(1);
ShaneKirkbride 0:70a6082c1bf7 73 }
ShaneKirkbride 0:70a6082c1bf7 74 return 0;
ShaneKirkbride 0:70a6082c1bf7 75
ShaneKirkbride 0:70a6082c1bf7 76 }
ShaneKirkbride 0:70a6082c1bf7 77
ShaneKirkbride 0:70a6082c1bf7 78 int main() {
ShaneKirkbride 0:70a6082c1bf7 79 led1=0;
ShaneKirkbride 0:70a6082c1bf7 80 debugSerial.baud(115200); // the baud rate here needs to match the esp-link config
ShaneKirkbride 0:70a6082c1bf7 81 espSerial.baud(115200);
ShaneKirkbride 0:70a6082c1bf7 82
ShaneKirkbride 0:70a6082c1bf7 83 debugSerial.printf("STM-Client starting!\n\r");
ShaneKirkbride 0:70a6082c1bf7 84 wait(0.5);
ShaneKirkbride 0:70a6082c1bf7 85
ShaneKirkbride 0:70a6082c1bf7 86 espSerial.printf("STM-Client starting!\n\r");
ShaneKirkbride 0:70a6082c1bf7 87 wait(0.5);
ShaneKirkbride 0:70a6082c1bf7 88
ShaneKirkbride 0:70a6082c1bf7 89 // Sync-up with esp-link, this is required at the start of any sketch and initializes the
ShaneKirkbride 0:70a6082c1bf7 90 // callbacks to the wifi status change callback. The callback gets called with the initial
ShaneKirkbride 0:70a6082c1bf7 91 // status right after Sync() below completes.
ShaneKirkbride 0:70a6082c1bf7 92 esp.wifiCb.attach(wifiCb); // wifi status change callback, optional (delete if not desired)
ShaneKirkbride 0:70a6082c1bf7 93 bool ok;
ShaneKirkbride 0:70a6082c1bf7 94 do {
ShaneKirkbride 0:70a6082c1bf7 95 //debugSerial.printf("main syncing..\n\r");
ShaneKirkbride 0:70a6082c1bf7 96 wait(0.5);
ShaneKirkbride 0:70a6082c1bf7 97 ok = esp.Sync(); // sync up with esp-link, blocks for up to 2 seconds
ShaneKirkbride 0:70a6082c1bf7 98 if (!ok){
ShaneKirkbride 0:70a6082c1bf7 99 debugSerial.printf("STM-Client sync failed!\n\r");
ShaneKirkbride 0:70a6082c1bf7 100 wait(0.5);
ShaneKirkbride 0:70a6082c1bf7 101 }
ShaneKirkbride 0:70a6082c1bf7 102 } while(!ok);
ShaneKirkbride 0:70a6082c1bf7 103
ShaneKirkbride 0:70a6082c1bf7 104 debugSerial.printf("STM-Client synced!\n\r");
ShaneKirkbride 0:70a6082c1bf7 105
ShaneKirkbride 0:70a6082c1bf7 106 // Get immediate wifi status info for demo purposes. This is not normally used because the
ShaneKirkbride 0:70a6082c1bf7 107 // wifi status callback registered above gets called immediately.
ShaneKirkbride 0:70a6082c1bf7 108 esp.GetWifiStatus();
ShaneKirkbride 0:70a6082c1bf7 109 STMClientPacket *packet;
ShaneKirkbride 0:70a6082c1bf7 110 if ((packet=esp.WaitReturn()) != NULL)
ShaneKirkbride 0:70a6082c1bf7 111 {
ShaneKirkbride 0:70a6082c1bf7 112 //debugSerial.printf("Wifi status: %i\n\r", packet->value);
ShaneKirkbride 0:70a6082c1bf7 113 //debugSerial.printf("waiting for wifi status...\n\r");
ShaneKirkbride 0:70a6082c1bf7 114 if(packet->value == 2) { ///ideally this would coincide with STATION_GOT_IP...
ShaneKirkbride 0:70a6082c1bf7 115 debugSerial.printf("WIFI CONNECTED\n\r");
ShaneKirkbride 0:70a6082c1bf7 116 wifiConnected = true;
ShaneKirkbride 0:70a6082c1bf7 117 } else {
ShaneKirkbride 0:70a6082c1bf7 118 debugSerial.printf("WIFI NOT READY: %i\n\r",packet->value);
ShaneKirkbride 0:70a6082c1bf7 119 //Serial.printf(status);
ShaneKirkbride 0:70a6082c1bf7 120 wifiConnected = false;
ShaneKirkbride 0:70a6082c1bf7 121 }
ShaneKirkbride 0:70a6082c1bf7 122 }
ShaneKirkbride 0:70a6082c1bf7 123
ShaneKirkbride 0:70a6082c1bf7 124
ShaneKirkbride 0:70a6082c1bf7 125 // Set up the REST client to talk to www.timeapi.org, this doesn't connect to that server,
ShaneKirkbride 0:70a6082c1bf7 126 // it just sets-up stuff on the esp-link side
ShaneKirkbride 0:70a6082c1bf7 127 int err = rest.begin("www.timeapi.org");
ShaneKirkbride 0:70a6082c1bf7 128 if (err != 0) {
ShaneKirkbride 0:70a6082c1bf7 129 debugSerial.printf("REST begin failed: %i\n\r",err);
ShaneKirkbride 0:70a6082c1bf7 130 while(1) ;
ShaneKirkbride 0:70a6082c1bf7 131 }
ShaneKirkbride 0:70a6082c1bf7 132 debugSerial.printf("STM-REST ready\n\r");
ShaneKirkbride 0:70a6082c1bf7 133 int loopStat = 0;
ShaneKirkbride 0:70a6082c1bf7 134 while(loopStat == 0){
ShaneKirkbride 0:70a6082c1bf7 135 debugSerial.printf("status: %i\n\r",loopStat);
ShaneKirkbride 0:70a6082c1bf7 136 loopStat = loop();
ShaneKirkbride 0:70a6082c1bf7 137 wait(1);
ShaneKirkbride 0:70a6082c1bf7 138 }
ShaneKirkbride 0:70a6082c1bf7 139 }