I am trying to use Wire2 on my Teensy4.1 to communicate with 4 LCD screens. When I use the scanner code and replace Wire with Wire2 I am able to find all of the screens on the bus, but I am unsure how to communicate with the screens in my code. I tried lcd.init(&Wire2) because I achieved communication on Wire1 by adding &Wire1 in setup but no luck with the screens. I am using Wire and Wire1 to successfully communicate with other sensors but I can't seem to figure this one out. What am I missing? I thought maybe I could run my code faster by using all 3 busses simultaneously as opposed to communicating with all of the sensors and screens on 1 bus. Am I wrong in assuming this?
Code:
#include <Wire.h>
#include <Servo.h>
#include <LiquidCrystal_I2C.h>
#include "Adafruit_MCP9600.h"
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
//LCDS
LiquidCrystal_I2C lcd1(0x24, 20, 4); // << Address 1
LiquidCrystal_I2C lcd2(0x25, 20, 4); // << Address 1
LiquidCrystal_I2C lcd3(0x26, 20, 4); // << Address 1
LiquidCrystal_I2C lcd4(0x27, 20, 4); // << Address 1
//TEMPERATURE SENSORS
Adafruit_MCP9600 engineTempSensor;
Adafruit_MCP9600 exhaustTempSensor;
//INPUTS
//FAN
int fanSpeedPot = 22;
int fanAuto = 2; //ACTIVE LOW
//THROTTLE
int throttlePot = 27;
int throttleAuto = 26; //ACTIVE LOW
//HEATER
int heaterOnOff = 29;
int heaterAuto = 28;// ACTIVE LOW
//NOISE
int decibelMeter = 14;
//AFR
int afr = 15;
//OUTPUTS
//FAN
int fan = 3;
//THROTTLE
Servo throttle;
//HEATER
int heater = 5;
//DATA
//TEMPERATURE
float engTemp;
float exhTemp;
//AFR
float afrLevel;
//NOISE
float decibelLevel;
//TAGS
//FAN
int fanSpeed;
//HEATER STATE
int heaterState;
//THROTTLE POSITION
int throttlePosition;
void setup() {
Wire.begin();
Wire1.begin();
Wire2.begin();
lcd1.init();
lcd2.init();
lcd3.init();
lcd4.init();
lcd1.backlight();
lcd2.backlight();
lcd3.backlight();
lcd4.backlight();
pinMode(fanSpeedPot, INPUT);
pinMode(fanAuto, INPUT_PULLUP);
pinMode(throttlePot, INPUT);
pinMode(throttleAuto, INPUT_PULLUP);
pinMode(heaterOnOff, INPUT_PULLUP);
pinMode(heaterAuto, INPUT_PULLUP);
pinMode(fan, OUTPUT);
pinMode(heater, OUTPUT);
pinMode(decibelMeter, INPUT);
pinMode(afr, INPUT);
throttle.attach(4);
Serial.begin(9600);
Serial5.begin(9600);
engineTempSensor.begin(0x65, &Wire1);
exhaustTempSensor.begin(0x66, &Wire1);
engineTempSensor.setADCresolution(MCP9600_ADCRESOLUTION_18);
engineTempSensor.setThermocoupleType(MCP9600_TYPE_K);
engineTempSensor.setFilterCoefficient(3);
exhaustTempSensor.setADCresolution(MCP9600_ADCRESOLUTION_18);
exhaustTempSensor.setThermocoupleType(MCP9600_TYPE_K);
exhaustTempSensor.setFilterCoefficient(3);
}
void loop() {
//FAN
if(digitalRead(fanAuto) == HIGH){
fanSpeed = analogRead(fanSpeedPot);
fanSpeed = map(fanSpeed, 0, 1023, 0, 255);
analogWrite(fan, fanSpeed);
}
//HEATER
if(digitalRead(heaterAuto) == HIGH){
heaterState = digitalRead(heaterOnOff);
heaterState = !heaterState;
digitalWrite(heater, heaterState);
}
//Throttle
if(digitalRead(throttleAuto) == HIGH){
throttlePosition = analogRead(throttlePot);
throttlePosition = map(throttlePosition, 0, 1023, 0, 180);
throttle.write(throttlePosition);
}
//TEMPERATURE
engTemp = engineTempSensor.readThermocouple();
exhTemp = exhaustTempSensor.readThermocouple();
//NOISE
decibelLevel = analogRead(decibelMeter);
decibelLevel = decibelLevel / 1023;
decibelLevel = decibelLevel * 50;
//AFR
afrLevel = analogRead(afr);
afrLevel = afrLevel * .0306;
//LCDS
//LCD 1
//ENGINE TEMPERATURE
lcd1.setCursor(0,0);
lcd1.print("ENG TEMP: ");
lcd1.print(engTemp);
lcd1.print("C ");
//EXHAUST TEMPERATURE
lcd1.setCursor(0,1);
lcd1.print("EXH TEMP: ");
lcd1.print(exhTemp);
lcd1.print("C ");
//ALTERNATOR TEMPERATURE
lcd1.setCursor(0,2);
lcd1.print("NOISE: ");
lcd1.print(decibelLevel);
lcd1.print("dB ");
//AFR
lcd1.setCursor(0,3);
lcd1.print("AFR: ");
lcd1.print(afrLevel);
lcd1.print("/ 1 ");
//LCD 2
//THROTTLE
lcd2.setCursor(0,0);
lcd2.print("THROTTLE: ");
throttlePosition = map(throttlePosition, 0, 180, 0, 100);
lcd2.print(throttlePosition);
lcd2.print("% ");
//FAN
lcd2.setCursor(0,1);
lcd2.print("FAN SPEED: ");
fanSpeed = map(fanSpeed, 0, 255, 0, 100);
lcd2.print(fanSpeed);
lcd2.print("% ");
//HEATER
lcd2.setCursor(0,2);
lcd2.print("HEATER ");
if(heaterState == HIGH){
lcd2.print("ON ");
}
else{
lcd2.print("OFF ");
}
}
