MerlynMetal
commented
1 year ago After several days of tweaking, trial and error I managed to get the code working. Main thing is I had to implement Software serial as the hardware serial refused to cooperate. Below is the working solution.
/**************************************************************
*
* Sending DHT, Soil Temp and Soil Moisture sensor data with SIM900 module to Thinspeak
* Based on TinyGSM examples and library
*and mjrovai ArduFarmBot series at Instructables.com
*
* TinyGSM Getting Started guide:
* http://tiny.cc/tiny-gsm-readme
*
**************************************************************/
#define TINY_GSM_MODEM_SIM900
// Increase RX buffer if needed
//#define TINY_GSM_RX_BUFFER 512
#include <TinyGsmClient.h>
// Uncomment this if you want to see all AT commands
#define DUMP_AT_COMMANDS
// Uncomment this if you want to use SSL
//#define USE_SSL
// Set serial for debug console (to the Serial Monitor, default speed 115200)
#define SerialMon Serial
// Use Hardware Serial on Mega, Leonardo, Micro
//#define SerialAT Serial
// or Software Serial on Uno, Nano
#include <SoftwareSerial.h>
SoftwareSerial SerialAT(12, 13); // RX, TX
// Your GPRS credentials
// Leave empty, if missing user or pass
const char apn[] = "xxxxx";
const char user[] = "";
const char pass[] = "";
// Server details
const char server[] = "api.thingspeak.com";
String TS_API_KEY ="xxxxx";
int sent = 0;
#ifdef DUMP_AT_COMMANDS
#include <StreamDebugger.h>
StreamDebugger debugger(SerialAT, SerialMon);
TinyGsm modem(debugger);
#else
TinyGsm modem(SerialAT);
#endif
#ifdef USE_SSL
TinyGsmClientSecure client(modem);
const int port = 443;
#else
TinyGsmClient client(modem);
const int port = 80;
#endif
/* TIMER */
#include <SimpleTimer.h>
SimpleTimer timer;
/* OLED */
#include <ACROBOTIC_SSD1306.h> // library for OLED: SCL ==> D1; SDA ==> D2
#include <SPI.h>
#include <Wire.h>
/* DHT22*/
#include "DHT.h"
#define DHTPIN D3
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
float hum = 0;
float temp = 0;
/* Soil Moister */
#define soilMoisterPin A0
#define soilMoisterVcc D4 //not used. LM393 VCC connect to 3.3V
int soilMoister = 0;
/* DS18B20 Temperature Sensor */
#include <OneWire.h>
#include <DallasTemperature.h>
#define ONE_WIRE_BUS 14 // DS18B20 on NodeMCU pin D5 corresponds to GPIO 014 on Arduino
float soilTemp;
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
void setup()
{
// Set console baud rate
SerialMon.begin(9600);
delay(10);
// Set GSM module baud rate
SerialAT.begin(9600);
delay(3000);
// Restart takes quite some time
// To skip it, call init() instead of restart()
SerialMon.println(F("Initializing modem..."));
modem.init();
String modemInfo = modem.getModemInfo();
SerialMon.print(F("Modem: "));
SerialMon.println(modemInfo);
// Unlock your SIM card with a PIN
//modem.simUnlock("1234");
Serial.begin(9600);
delay(10);
oledStart();
dht.begin();
DS18B20.begin();
connectGPRS();
timer.setInterval(5000L, getDhtData);
timer.setInterval(5000L, getSoilMoisterData);
timer.setInterval(5000L, getSoilTempData);
timer.setInterval(10000L, sendDataTS);
}
/***************************************************
* Start OLED
**************************************************/
void oledStart(void)
{
Wire.begin();
oled.init(); // Initialze SSD1306 OLED display
clearOledDisplay();
oled.clearDisplay(); // Clear screen
oled.setTextXY(0,0);
oled.putString(" ");
}
/***************************************************
* Get DHT data
**************************************************/
void getDhtData(void)
{
float tempIni = temp;
float humIni = hum;
temp = dht.readTemperature();
hum = dht.readHumidity();
if (isnan(hum) || isnan(temp)) // Check if any reads failed and exit early (to try again).
{
Serial.println("Failed to read from DHT sensor!");
temp = tempIni;
hum = humIni;
return;
}
}
/***************************************************
* Get Soil Moister Sensor data
**************************************************/
void getSoilMoisterData(void)
{
soilMoister = 0;
digitalWrite (soilMoisterVcc, HIGH);
delay (500);
int N = 3;
for(int i = 0; i < N; i++) // read sensor "N" times and get the average
{
soilMoister += analogRead(soilMoisterPin);
delay(150);
}
digitalWrite (soilMoisterVcc, LOW);
soilMoister = soilMoister/N;
Serial.println(soilMoister);
soilMoister = map(soilMoister, 689, 274, 0, 100);
}
/***************************************************
* Get SoilTemp sensor data
**************************************************/
void getSoilTempData()
{
DS18B20.requestTemperatures();
soilTemp = DS18B20.getTempCByIndex(0);
int newData = ((soilTemp + 0.05) * 10); //fix soilTemp value to 1 decimal place.
soilTemp = (newData / 10.0);
}
/***************************************************
* Display data at Serial Monitora & OLED Display
**************************************************/
void displayData(void)
{
//Serial.print(" Temperature: ");
//Serial.print(temp);
//Serial.print("oC Humidity: ");
//Serial.print(hum);
//Serial.println("%");
//Serial.print("SoilTemp: ");
//Serial.print(soilTemp);
//Serial.print("oC");
oled.setTextXY(1,0); // Set cursor position, start of line 2
oled.putString("TEMP: " + String(temp) + " oC");
oled.setTextXY(3,0); // Set cursor position, start of line 2
oled.putString("HUM : " + String(hum) + " %");
oled.setTextXY(5,0); // Set cursor position, start of line 2
oled.putString("Tsoil:" + String(soilTemp) + " oC");
oled.setTextXY(7,0); // Set cursor position, start of line 2
oled.putString("Hsoil: " + String(soilMoister) + " %");
}
/***************************************************
* Clear OLED Display
**************************************************/
void clearOledDisplay()
{
oled.setFont(font8x8);
oled.setTextXY(0,0); oled.putString(" ");
oled.setTextXY(1,0); oled.putString(" ");
oled.setTextXY(2,0); oled.putString(" ");
oled.setTextXY(3,0); oled.putString(" ");
oled.setTextXY(4,0); oled.putString(" ");
oled.setTextXY(5,0); oled.putString(" ");
oled.setTextXY(6,0); oled.putString(" ");
oled.setTextXY(7,0); oled.putString(" ");
oled.setTextXY(0,0); oled.putString(" ");
}
void loop()
{
displayData();
timer.run(); // Initiates SimpleTimer
}
void connectGPRS() {
SerialMon.print(F("Waiting for network..."));
if (!modem.waitForNetwork()) {
SerialMon.println(" fail");
delay(10000);
return;
}
SerialMon.println(" OK");
SerialMon.print(F("Connecting to "));
SerialMon.print(apn);
if (!modem.gprsConnect(apn, user, pass)) {
SerialMon.println(" fail");
delay(10000);
return;
}
SerialMon.println(" OK");
SerialMon.print(F("Connecting to "));
SerialMon.print(server);
if (!client.connect(server, port)) {
SerialMon.println(" fail");
delay(10000);
return;
}
SerialMon.println(" OK");
unsigned long timeout = millis();
while (client.connected() && millis() - timeout < 10000L) {
// Print available data
while (client.available()) {
char c = client.read();
SerialMon.print(c);
timeout = millis();
}
}
SerialMon.println();
}
void sendDataTS(void)
{
if (client.connect(server, 80))
{
String postStr = TS_API_KEY;
postStr += "&field1=";
postStr += String(temp);
postStr += "&field2=";
postStr += String(hum);
postStr += "&field3=";
postStr += String(soilMoister);
postStr += "&field4=";
postStr += String(soilTemp);
postStr += "\r\n\r\n";
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: " + TS_API_KEY + "\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n");
client.print(postStr);
delay(1000);
}
sent++;
client.stop();
}
Hi, I'm trying to communicate with my channel on Thingspeak however it looks like I'm missing something as my data doesn't appear in the feeds. Below is my code:
First I get this on my serial monitor:
Then Every 10 sec this: