Many thanks for the input, you have all been very helpful and gentle on me
I have now it working, updating the LCD display and updating thingspeak every thirty seconds
It compiles OK and runs fine on a nano although is getting short of RAM, the compiler advises....
Sketch uses 13,656 bytes (44%) of program storage space. Maximum is 30,720 bytes.
Global variables use 1,587 bytes (77%) of dynamic memory, leaving 461 bytes for local variables. Maximum is 2,048 bytes.
I also get one warning for the whole sketch, as below..
warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
scantext("IP",clientip);
I have posted the code below. Does anyone have any input which would make it better and/or free up some memory please?
I have had to split across posts as otherwise I get a warning that my post exceeds 9000 characters.
Deeclarations, setup and loop here...
#include <AltSoftSerial.h> // ESP8266 comms
#include "EmonLib.h" // energy monitoring functions
#include <Wire.h> // for I2C functionality
#include <LiquidCrystal_I2C.h> // LCD display functions (over I2C)
//config data - all constants
const byte halfwaves= 20; // number of zero-crossings to monitor
const int timeout = 2000; // timeout (in ms) if nothing received from CTs
const int baudrate = 9600; // serial monitor and ESP8266 comms
const int tsupdate = 30000; // interval to update thingspeak (in ms)
const byte voltspin = 0, pvpin = 1; // analogue pins for volt & current sensors
const byte mainspin = 2, heaterpin = 3;
//calibration data for each input. Accounts for variations in CT outputs and AC adaptor output
const float voltcal = 228.00;
const float ipvcal = 59.00;
const float imainscal = 59.00;
const float iheatercal= 55.50;
const float phaseshift= 1.50;
const float pvoffset = 0; // correction for pv generation (Watts)
const float mainsoffset = -100; // correction for import/export (Watts)
const float heateroffset = -100; // correction for heater reading (Watts)
const char ssid[] = "PLUSNET-CTPM"; // wifi network ssid
const char pwd[] = "babyb00ba"; // wifi password
const char ip[] = "184.106.153.149"; // thingspeak IP address
const char GET[] = "GET /update?key=SIL2SDM25R4JO419";// thingspeak private key
// global variables for voltage, current and power for each input plus calculated house usage
float qpv=0;
float qmains = 0;
float qheater = 0;
float housetotal = 0;
//wifi in/out strings
char incoming [100];
char clientip [16];
//thingspeak update variables
unsigned long oldmillis;
bool setupcomplete=false;
bool TSupdated=false;
//Objects
EnergyMonitor emonpv; // Create an instance of energy monitor for PV
EnergyMonitor emonmains; // Create an instance of energy monitor for mains import/export
EnergyMonitor emonheater; // Create an instance of energy monitor for immersion heater diversion
AltSoftSerial wifiserial; // Start up a software serial port on D8 and D9 for ESP module comms
LiquidCrystal_I2C lcd(0x3f, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Set the LCD I2C address and pins on the I2C backpack
void setup() {
Serial.begin(baudrate);
wifiserial.begin(baudrate);
lcd.begin(20,4); // initialize the lcd for 20 chars 4 lines, turn on backlight
lcdtext(2,0," Please wait");
ESP8266command("ATE0"); // confirm communication with ESP8266 module
if (ESP8266response("OK",2000))
{
lcdtext(1,1,"Connecting to WiFi");
connecttowifi(); // now try to connect to wifi network;
if(ESP8266response("OK",10000))
{
lcdtext(0,1," WiFi connected ");
lcdtext(0,2,"Obtaining IP address");
ESP8266command("AT+CIFSR"); // now request IP address and MAC address
if(ESP8266response("OK",5000))
{
scantext("IP",clientip);
lcdtext(0,2," ");
lcdtext(0,2,"IP = ");
lcdtext(5,2,clientip);
ESP8266command("AT+PING=\"8.8.8.8\""); //now confirm internet connectivity by pinging
if(ESP8266response("OK",10000)) //Google DNS servers
{
lcdtext(0,3," Internet access OK "); //now have internet connection
setupcomplete=true;
}
else
{
lcdtext(0,3," fail - no internet "); //no internet connection
}
}
else
{
lcdtext(0,2," ");
lcdtext(0,2," No IP - check DHCP "); //no IP (router issue?)
}
}
else
{
lcdtext(0,1," Connection failed "); //failed to connect to wifi
}
}
else
{
lcdtext(0,0,"Internal comms fault"); //no communication with ESP8266
}
delay(2000); //keep setup/error messages on screen for 2seconds
lcd.clear(); //opersting screen for LCD
lcdtext(0,0,"Solar : KW");
lcdtext(0,1,"Import: KW");
lcdtext(0,2,"House : KW");
lcdtext(0,3,"Heater: KW");
//calibration of the energy monitor instances
Serial.println(F("Calibrating Emon instances"));
emonpv.voltage(voltspin, voltcal, phaseshift); // Voltage: input pin, calibration, phase_shift
emonpv.current(pvpin, ipvcal); // Current: input pin, calibration.
emonmains.voltage(voltspin, voltcal, phaseshift); // Voltage: input pin, calibration, phase_shift
emonmains.current(mainspin, imainscal); // Current: input pin, calibration.
emonheater.voltage(voltspin, voltcal, phaseshift); // Voltage: input pin, calibration, phase_shift
emonheater.current(heaterpin, iheatercal); // Current: input pin, calibration.
}
void loop() {
getenergyvalues();
updateLCD(qpv, qmains, qheater, housetotal);
// update thingspeak after first run then after every 30 seconds
if (!TSupdated) {
sendtothingspeak(qpv, qmains, qheater, housetotal);
oldmillis=millis();
TSupdated=true;
}
if ((millis()-oldmillis) >30000){
sendtothingspeak(qpv, qmains, qheater, housetotal);
oldmillis=millis();
}
}
