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/****************************************************
Instructions:
1. Ensure that the DHT and HX711 library files are installed correctly.
2. Wiring set up
a. DHT22 data --> D6
b. HX711 data --> D2
c. HX711 data --> D3
d. SIM800L wiring is the same
3.
*****************************************************/
#include <SoftwareSerial.h>
#include <DHT.h>
#include <HX711.h>
#include <LowPower.h>
#define DHTPIN 6
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
HX711 scale;
float dht22_humidity;
float dht22_temperature;
float hx711_lbs;
float hx711_calib_factor = -7050; //Taken from provided sketch, assumed correct
float test_value = 100.11;
uint32_t tick_start, tick_current;
SoftwareSerial Sim800l(8,9); // RX, TX
String str = "";
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
dht.begin();
// set the data rate for the SoftwareSerial port
Sim800l.begin(4800);
delay(5000);
Sim800l.write("AT \n");
delay(10000);
Serial.println("AT+CGATT=1");
Sim800l.write("AT+CGATT=1\r\n");
delay(7000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CSTT=hologram");
Sim800l.write("AT+CSTT=\"hologram\"\r\n");
delay(5000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIICR");
Sim800l.write("AT+CIICR\r\n");
delay(6000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIFSR");
Sim800l.write("AT+CIFSR\r\n");
delay(5000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIPSTART=\"UDP\",\"73.230.57.21\",\"8888\"");
Sim800l.write("AT+CIPSTART=\"UDP\",\"73.230.57.21\",\"8888\"\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
Sim800l.write("AT+CIPSEND=39\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
Sim800l.write("temperature,device=arduino01 value=84.9\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
// Sim800l.write("AT+CIPSHUT\r\n");
// delay(5000);
// if (Sim800l.available()) {
// Serial.write(Sim800l.read());
// }
}
void loop() {
getDHT22Data();
//getHX711Data();
sendPayload();
delay(500);
Sim800l.write("AT+CIPSHUT\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
//15 mins * 60s/min = 900 secs
//900 s / 8s = 112.5 which rounds up to 113
for (uint8_t i =113; i > 0; i--) {
LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
}
setup_sim800();
}
/*
* HX711 Data Reading, in lbs
* Calibration factor is from the sketch provided by Blake
* Assumption - no need to change this factor or re-calibrate
*/
void getHX711Data() {
scale.set_scale(hx711_calib_factor);
hx711_lbs = scale.get_units();
str = "HX711 Data: " + String(hx711_lbs);
str += "lbs\n\r";
Serial.println(str);
}
/*
* DHT22 Humidity and Temperature Reading
* Returns true if data reading is correct
*/
bool getDHT22Data() {
dht22_humidity = dht.readHumidity();
dht22_temperature = dht.readTemperature(true);
//if (isnan(dht22_humidity) || isnan(dht22_temperature)) {
//Serial.println(F("Failed to read from DHT sensor!"));
//return false;
//}
str = "Humidity = \t" + String(dht22_humidity);
str += "\n\rTemperature = \t" + String(dht22_temperature);
Serial.println(str);
return true;
}
void sendPayload(void)
{
String cmd = "AT+CIPSEND=";
uint16_t len = 39;
str = "temperature,device=arduino01 value=" + (String)dht22_temperature;
len = str.length();// - 2; //Blake said CR and NL characters are not to be counted in len
cmd += (String)len + "\r\n";
Serial.println("Sending data length");
Sim800l.write(cmd.c_str());
delay(10000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
//Data being sent
Serial.println("Sending data");
Sim800l.write(str.c_str());
delay(10000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
}
void setup_sim800(void)
{
// set the data rate for the SoftwareSerial port
Sim800l.begin(4800);
delay(5000);
Sim800l.write("AT \n");
delay(10000);
Serial.println("AT+CGATT=1");
Sim800l.write("AT+CGATT=1\r\n");
delay(7000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CSTT=hologram");
Sim800l.write("AT+CSTT=\"hologram\"\r\n");
delay(5000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIICR");
Sim800l.write("AT+CIICR\r\n");
delay(6000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIFSR");
Sim800l.write("AT+CIFSR\r\n");
delay(5000);
if (Sim800l.available() > 0) {
Serial.write(Sim800l.read());
}
Serial.println("AT+CIPSTART=\"UDP\",\"73.230.57.21\",\"8888\"");
Sim800l.write("AT+CIPSTART=\"UDP\",\"73.230.57.21\",\"8888\"\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
Sim800l.write("AT+CIPSEND=39\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
Sim800l.write("temperature,device=arduino01 value=84.9\r\n");
delay(5000);
if (Sim800l.available()) {
Serial.write(Sim800l.read());
}
}