DHT11 and OLED problem

mierdogann · 2023-11-06 19:50:51 UTC

Hello Dear Forum Members,

My name is Mahir, a newcomer to the forum and an enthusiastic hobbyist coder. I’m thrilled to be a part of this fantastic community and eager to learn more about coding.

I’m currently working on a project and have encountered some issues. I’ve browsed through previous posts related to the topic, but couldn’t quite find a solution to my specific problem.

Command failed: avr-toolchain\bin\avr-g++ -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10605 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -I"C:\Users\Public\Programs\mblock\resources\app\mlink-v1\external\arduino\avr-library\variants\standard" -I"avr-library/cores/arduino" -I"arduino-libraries/makeblock/src" -I"arduino-libraries/makeblock/src/utility/avr" -I"avr-library/libraries/Wire/src/utility" -I"avr-library/libraries/Wire/src/" -I"avr-library/libraries/EEPROM/src/" -I"avr-library/libraries/SPI/src/" -I"avr-library/libraries/SoftwareSerial/src/" -I"arduino-libraries/arduino/WiFi/src/" -I"arduino-libraries/arduino/SD/src/" -I"arduino-libraries/arduino/Bridge/src/" -I"arduino-libraries/arduino/Temboo/src/" -I"arduino-libraries/arduino/Servo/src/" -I"arduino-libraries/arduino/Ethernet/src/" -I"arduino-libraries/arduino/TFT/src/" -I"arduino-libraries/arduino/SpacebrewYun/src/" -I"arduino-libraries/arduino/LiquidCrystal/src/" -I"arduino-libraries/arduino/GSM/src/" -I"arduino-libraries/arduino/Adafruit_Circuit_Playground/" -I"arduino-libraries/arduino/Adafruit_Circuit_Playground/utility/" -I"arduino-libraries/arduino/Esplora/src/" -I"arduino-libraries/arduino/Firmata/" -I"arduino-libraries/arduino/Firmata/utility/" -I"arduino-libraries/arduino/Keyboard/src/" -I"arduino-libraries/arduino/Mouse/src/" -I"arduino-libraries/arduino/Robot_Control/src/" -I"arduino-libraries/arduino/Robot_Motor/src/" -I"arduino-libraries/arduino/RobotIRremote/src/" -I"arduino-libraries/arduino/Stepper/src/" “C:\Users\mahir\mblock-avr\temp\build\code.cpp” -o “C:\Users\mahir\mblock-avr\temp\build\code.o” C:\Users\mahir\mblock-avr\temp\build\code.cpp: In function ‘void setup()’: C:\Users\mahir\mblock-avr\temp\build\code.cpp:51:49: error: no matching function for call to ‘U8X8_drawString(int, int, float)’ U8X8_drawString(0,3,dht_11_1.readTemperature()); ^ C:\Users\mahir\mblock-avr\temp\build\code.cpp:30:6: note: candidate: void U8X8_drawString(int, int, char*) void U8X8_drawString(int x, int y, char *str){ ^~~~~~~~~~~~~~~ C:\Users\mahir\mblock-avr\temp\build\code.cpp:30:6: note: no known conversion for argument 3 from ‘float’ to ‘char*’ C:\Users\mahir\mblock-avr\temp\build\code.cpp:33:6: note: candidate: void U8X8_drawString(int, int, String) void U8X8_drawString(int x, int y, String str){ ^~~~~~~~~~~~~~~ C:\Users\mahir\mblock-avr\temp\build\code.cpp:33:6: note: no known conversion for argument 3 from ‘float’ to ‘String’

Failed to compile file code.cpp

arduino build failed.

In this error, it seems to be asking me to convert the data type. Could you please provide a small visual example on how to do that?

If you can provide assistance or point me in the right direction, I would greatly appreciate it. As a new user, your insights or collaborative problem-solving would be immensely valuable.

Thank you in advance for any help you can offer!

Best_codes · 2023-11-06 20:58:32 UTC

These are problems with the extensions. Most likely the OLED one. You can use the DHT11 one I made (just search Best_codes), and you can try to find a better OLED one. If you can give me the part # of your OLED screen, I might be able to make an extension for it as well, but that might be a while. Otherwise, you might try using the code from the blocks in the mBlock Arduino C editor for UNOs. Also, which UNO device in mBlock are you using?

P.S. Welcome to the forum!

mierdogann · 2023-11-06 21:59:15 UTC

“Hello again, and thank you for your response. I have an Arduino Uno at my disposal. The screen I’m using is 1.3 inches, and I can only get a proper display using the ‘U8g2/U8x8lib.h’ library in mBlock. I didn’t opt for other screens as they are a bit small, but I later realized that there is much more documentation and resources for them. I would truly appreciate your assistance in creating an extension for my screen.”

The number on the OLED screen should not mislead you; I wrote it for a test.

Thank you for your support. After overcoming these stages and coding, I hope to have the opportunity to help beginners like you.

Best_codes · 2023-11-06 21:59:57 UTC

I’'ll see what I can do! Please allow a long time though…

mierdogann · 2023-11-06 22:01:50 UTC

No problem at all, thank you for taking the time.

// generated by mBlock5 for
// codes make you happy

#include “src/DHT.h”
#include “U8g2/U8x8lib.h”

#include <Arduino.h>
#include <Wire.h>
#include <SoftwareSerial.h>

float sicaklik = 0;
float nem = 0;

DHT dht_11_1(8, DHT11);
#define U8X8_MODEL 1

#if U8X8_MODEL==1
U8X8_SH1106_128X64_NONAME_HW_I2C u8x8(U8X8_PIN_NONE);
#elif U8X8_MODEL==2
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(U8X8_PIN_NONE);
#endif

void U8X8_drawString(int x, int y, char *str){
u8x8.drawString(x, y, str);
}
void U8X8_drawString(int x, int y, String str){
u8x8.drawString(x, y, str.c_str());
}
int U8X8_CURRENTLINE=0;

void _delay(float seconds) {
long endTime = millis() + seconds * 1000;
while(millis() < endTime) _loop();
}

void setup() {
dht_11_1.begin();
u8x8.begin();
u8x8.setPowerSave(0);

u8x8.setFont(u8x8_font_pressstart2p_f);
u8x8.clearDisplay();
U8X8_CURRENTLINE=0;
U8X8_drawString(0,3,String(dht_11_1.readTemperature()).toInt());
U8X8_drawString(0,U8X8_CURRENTLINE * 1,"");
U8X8_CURRENTLINE++;
if (U8X8_CURRENTLINE * 1 > 64) {u8x8.clearDisplay(); U8X8_CURRENTLINE=0;}
U8X8_drawString(0,0,“NEM”);
U8X8_drawString(0,U8X8_CURRENTLINE * 1,"");
U8X8_CURRENTLINE++;
if (U8X8_CURRENTLINE * 1 > 64) {u8x8.clearDisplay(); U8X8_CURRENTLINE=0;}

}

void _loop() {
}

void loop() {
_loop();
}

Best_codes · 2023-11-07 19:30:23 UTC

Try this code manually:


#include <DHT.h>
#include <U8g2lib.h>

#include <Arduino.h>
#include <Wire.h>
#include <SoftwareSerial.h>

float sicaklik = 0;
float nem = 0;

DHT dht_11_1(8, DHT11);
U8G2_SH1106_128X64_NONAME_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

void setup() {
  dht_11_1.begin();
  u8g2.begin();
  u8g2.setPowerSave(0);

  u8g2.setFont(u8g2_font_pressstart2p_f);
  u8g2.clearDisplay();

  u8g2.drawStr(0, 3, String(dht_11_1.readTemperature()).c_str());
  u8g2.drawStr(0, 6, "");
  u8g2.drawStr(0, 0, "NEM");
  u8g2.drawStr(0, 9, "");
  u8g2.sendBuffer();
}

void loop() {
  float temperature = dht_11_1.readTemperature();
  float humidity = dht_11_1.readHumidity();

  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_pressstart2p_f);
  u8g2.setCursor(0, 3);
  u8g2.print(temperature);
  u8g2.setCursor(0, 6);
  u8g2.print(humidity);
  u8g2.sendBuffer();

  delay(2000);
}

Hope this helps. The error is with the curly quotes in “DHT.h”. They should be normal.

mierdogann · 2023-11-08 16:48:37 UTC

Adafruit_SH1106-master.zip (15.4 KB)

I can capture images from the screen with the library I added. I included it in case you want to take a look because I don’t know how to transfer this library to mBlock. I might need a bit of help to do it through the code. I hope we can overcome this issue together.

I will attach some photos and video

Best_codes · 2023-11-08 18:31:48 UTC

It might be a while… I have been really busy.

Best_codes · 2023-11-21 19:52:04 UTC

I looked, and it is a bit too complicated for me to make right now, sorry.
You can try making an extension here:
https://ext.mblock.cc/