wifisensor.ino

#include <SoftwareSerial.h>
#include <DHT.h>
#define DHTTYPE DHT22
#define DHTPIN 12
#define LED_PIN 13

DHT dht(DHTPIN, DHTTYPE);

SoftwareSerial dbgSerial(2, 3); // RX, TX

char URL[] = "\"64.94.18.120\",80";
int request_len = 0;
float temperature;
float humidity;
char CRLF[] = "\r\n";
bool led_state = false;

void init_wifi() {
  send_cmd("AT+RST");

  if(Serial.find("Ready")) {
    dbgSerial.println("ready!");
    digitalWrite(LED_PIN, LOW);
  }

  delay(5000);
  send_cmd("AT+CIFSR");

  dbgSerial.println(Serial.readString());
}

// copy chars from one char array into another
void tcpy(char dest[], char source[], int offset) {
  for(int i = 0; i < strlen(source); i++) {
    dest[offset + i] = source[i];
  }
}


bool xively_put(int temperature, int humidity) {

  char temperature_c[3];
  itoa(temperature, temperature_c, 10);

  char humidity_c[3];
  itoa(humidity, humidity_c, 10);

  char json[] = "{\"version\":\"1.0.0\", \"datastreams\": ["
    "{\"id\": \"temperature\", \"current_value\": \"00\"}"
    ", {\"id\": \"humidity\", \"current_value\": \"00\"}"
    "]}\n";

  tcpy(json, temperature_c, 76);
  tcpy(json, humidity_c, 119);

  // dbgSerial.println(json);

  char head[] = "PUT /v2/feeds/897714818 HTTP/1.1\r\n"
    "User-Agent: ESP8266\r\n"
    "Host: 64.94.18.120\r\n"
    "Content-Type: application/json\r\n"
    "Content-Length:    \r\n"  // the spaces are a placeholder for the real length number.
    "X-ApiKey: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\r\n"
    "\r\n";

  char content_length[4];
  itoa(strlen(json), content_length, 10);
  tcpy(head, content_length, 120);

  char request_length[4];
  itoa(strlen(head) + strlen(json), request_length, 10);

  send_part("AT+CIPSTART=\"TCP\",");
  send_part(URL);
  send_part(CRLF);

  if(Serial.find("Linked")) {
    dbgSerial.println("Linked!");
  }

  send_part("AT+CIPSEND=");
  send_part(request_length);
  send_part(CRLF);

  send_part(head);
  send_part(json);

  if(Serial.find("X-Request-Id: ")) {
    dbgSerial.println("found X-Request-Id");
    String request_id = Serial.readStringUntil('\n');
    dbgSerial.println(request_id);
    return true;
  } else {
    dbgSerial.println("nope :(");
    return false;
  }
}


void send_cmd(char cmd[]) {
    dbgSerial.print(cmd);
    dbgSerial.print("\r\n");
    Serial.print(cmd);
    Serial.print("\r\n");
}

void send_part(char cmd[]) {
    dbgSerial.print(cmd);
    Serial.print(cmd);
}


void setup() {
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, HIGH);
  dbgSerial.begin(9600);
  dbgSerial.println("Init");

  Serial.begin(9600);
  Serial.setTimeout(4000);

  dht.begin();
  init_wifi();
}


void loop() {
  humidity = (int) dht.readHumidity();
  temperature = (int) dht.readTemperature();
  if(! xively_put(temperature, humidity)) {
    init_wifi();
  }
  led_state != led_state;
  digitalWrite(LED_PIN, led_state);
  delay(30000);
}

any hope of getting a pared down version without software serial running? I'm trying to run this on a trinket pro (native 3.3V) but I think software serial doesn't run at the clock speed that my board runs at.