I am adding an oled screen into my project, serial information works fine but oled screen will not initialize. The screen works fine in a basic oled screen test sketch on it's own but does not work when introduced into my project. When I add display information in the loop it just seems to stop everything from doing what it is supposed to. Just seems a bit strange but I must be missing something.
Any ideas?
// Servo side
#include <Arduino.h>
#include <Wire.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <BMP180MI.h>
#include <Servo.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Fonts/FreeSans9pt7b.h>
#define CE_PIN 7
#define CSN_PIN 8
#define GREEN 6
#define RED 5
#define I2C_ADDRESS 0x77
// OLED display TWI address
#define OLED_ADDR 0x3C
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 0 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Servo myservo; // create servo object to control a servo
int button1;
int button2;
int led1 = RED;
int led2 = GREEN;
int angle =180; // initial angle for servo
int angleStep =180;
BMP180I2C bmp180(I2C_ADDRESS);
RF24 radio(7, 8); // CE, CSN
const byte addresses[][6] = {"00001", "00002"};
struct data
{
int button1State;
int button2State;
} receivedData;
bool newData = false;
unsigned long currentMillis;
unsigned long prevMillis;
unsigned long txIntervalMillis = 1000; // send once per second
// test data *******************************
float val2;
float temperature;
char dataToSend[20];
int val11;
void setup() {
Wire.begin();
// initialize and clear display
display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR);
display.clearDisplay();
display.drawRect(0, 0, 128, 64, WHITE);
display.display();
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
myservo.attach(4);
myservo.write(angle);
Serial.begin(9600);
Serial.println("Test Starting");
radio.begin();
radio.openWritingPipe(addresses[1]); // 00001
radio.openReadingPipe(1, addresses[0]); // 00002
radio.setPALevel(RF24_PA_MIN);
radio.setDataRate( RF24_2MBPS );
//begin() initializes the interface, checks the sensor ID and reads the calibration parameters.
if (!bmp180.begin())
{
Serial.println("begin() failed. check your BMP180 Interface and I2C Address.");
while (1);
}
//reset sensor to default parameters.
bmp180.resetToDefaults();
//enable ultra high resolution mode for pressure measurements
bmp180.setSamplingMode(BMP180MI::MODE_UHR);
}
//====================
void loop() {
radio.startListening();
while (!radio.available());
radio.read(&receivedData, sizeof(receivedData));
if (receivedData.button1State == LOW) {
// turn LED on:
myservo.write(180);
delay(500);
digitalWrite(RED, HIGH);
digitalWrite(GREEN, LOW);
} else { if (receivedData.button2State == LOW) {
// turn LED on:
myservo.write(0);
delay(500);
digitalWrite(GREEN, HIGH);
digitalWrite(RED, LOW);
}
}
radio.stopListening();
float temp ; //Float..
val11 = analogRead (1) ; //Sets analog pin 1 as input
temp = val11 / 3.930 ; //Val1 divided by 4.092
val11 = (int) temp ; //get float
val2 = ((val11 % 200) / 11.18 ); //Value divider line. I set to 200% to read from a 12 volt system with a divider value of 11.18
Serial.println (val2) ; //Prints to serial monitor window
currentMillis = millis();
if (currentMillis - prevMillis >= txIntervalMillis) {
makePacket(val2, temperature);
send();
prevMillis = millis();
if (!bmp180.measureTemperature())
{
Serial.println("could not start temperature measurement, is a measurement already running?");
return;
}
//wait for the measurement to finish. proceed as soon as hasValue() returned true.
do
{
delay(100);
} while (!bmp180.hasValue());
Serial.print("Temperature: ");
Serial.print(bmp180.getTemperature());
Serial.println(" degC");
}
}
//====================
void makePacket(float val2, float temp)
{
// convert data to int for easier transmission
int batteryInt = val2 * 100;
int tempInt = bmp180.getTemperature() * 100;
// make packet
sprintf(dataToSend, "%d,%d", batteryInt, tempInt);
}
void send() {
bool rslt;
rslt = radio.write( &dataToSend, sizeof(dataToSend) );
// Always use sizeof() as it gives the size as the number of bytes.
// For example if dataToSend was an int sizeof() would correctly return 2
Serial.print("Data Sent ");
Serial.print(dataToSend);
if (rslt) {
Serial.println(" Acknowledge received");
}
else {
Serial.println(" Tx failed");
}
}
Do not wait for things, react to things happening.
Do not force the NRF through each step, process received packets when they arrive.
As a (mostly) listener, you should call startListening in setup and only switch to sending
when necessary and call startListening when done sending.
J-M-L:
pin 0 is attached to the Serial communication... that sounds suspicious to me and the comment states making it -1 if sharing Arduino reset pin...
Now it probably depends on which Arduino you are.... it could relate to GPIO0?
Hi J-M-L, thanks for your reply. The only reason i left that in was because it was already in a working sketch but on removing it just now it makes zero difference to the program, so i'll just leave it out! I'm using a couple of nanos for this project -
It really is strange but there must be something I am clearly missing.
On uploading the I2C scanner sketch, it picks up both the bmp180 and the oled screen. If I upload the following sketch, with only the sensor and the screen, both work perfectly alongside each other. When I try to integrate it into my original program....
#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <BMP180MI.h>
#include <Fonts/FreeSans9pt7b.h>
#define I2C_ADDRESS 0x77
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);
// OLED display TWI address
#define OLED_ADDR 0x3C
//create an BMP180 object using the I2C interface
BMP180I2C bmp180(I2C_ADDRESS);
int val11;
float val2;
void setup() {
// initialize and clear display
display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR);
display.clearDisplay();
// put your setup code here, to run once:
Serial.begin(9600);
//wait for serial connection to open (only necessary on some boards)
while (!Serial);
Wire.begin();
//begin() initializes the interface, checks the sensor ID and reads the calibration parameters.
if (!bmp180.begin())
{
Serial.println("begin() failed. check your BMP180 Interface and I2C Address.");
while (1);
}
//reset sensor to default parameters.
bmp180.resetToDefaults();
//enable ultra high resolution mode for pressure measurements
bmp180.setSamplingMode(BMP180MI::MODE_UHR);
}
void loop() {
// put your main code here, to run repeatedly:
delay(1000);
//start a temperature measurement
if (!bmp180.measureTemperature())
{
Serial.println("could not start temperature measurement, is a measurement already running?");
return;
}
//wait for the measurement to finish. proceed as soon as hasValue() returned true.
do
{
delay(100);
} while (!bmp180.hasValue());
Serial.print("Temperature: ");
Serial.print(bmp180.getTemperature());
Serial.println(" degC");
display.setFont(&FreeSans9pt7b);
display.setTextColor(WHITE, BLACK);
display.setCursor(10,25);
display.setTextSize(1);
display.println("Temp");
display.drawRect(0, 0, 128, 64, WHITE);
display.setFont(&FreeSans9pt7b);
display.setTextColor(WHITE, BLACK);
display.setCursor(70,25);
display.setTextSize(1);
display.println("Batts");
display.setFont(&FreeSans9pt7b);
display.setTextColor(WHITE, BLACK);
display.setCursor(10,49);
display.setTextSize(1);
display.println(bmp180.getTemperature());
display.setFont(&FreeSans9pt7b);
display.setTextColor(WHITE, BLACK);
display.setCursor(70,49);
display.setTextSize(1);
display.println(val2);
display.display();
display.clearDisplay();
float temp;
val11=analogRead(1);
temp=val11/4.182;
val2=(temp/10);
Serial.println(val2);
}
