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+-- Forum: Technical Support (https://www.kincony.com/forum/forumdisplay.php?fid=20)
+--- Forum: KC868-A16 (https://www.kincony.com/forum/forumdisplay.php?fid=25)
+--- Thread: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE (/showthread.php?tid=7490)
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RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - Cesarcardca - 02-04-2025
(01-31-2025, 11:53 PM)admin Wrote: after china new year holidays, will test it then feedback to you.
I think that's great. Happy New Year and I appreciate your kind attention. Best regards.
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - andrecaetano - 02-05-2025
(01-27-2025, 05:43 PM)Cesarcardca Wrote: I NEED PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL I2C FROM ARDUINO IDE. Or if your recommendation is through esphome, I could also try it, I need the syntax, or the devices for inputs and outputs so I can manipulate my program since I also need to interrupt a sensor.
Just add this code to your code for input/output controls.
Code:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// I2C address of the LCD
#define LCD_ADDR 0x3f
//Some models may use 0x27 address
// Initialize the LCD
LiquidCrystal_I2C lcd(LCD_ADDR, 20, 20);
void setup() {
Wire.begin(4, 5); // SDA pin = 4, SCL pin = 5 on the ESP32
Serial.begin(115200);
lcd.init(); // Initialize the LCD
lcd.backlight(); // Turn on the LCD backlight
lcd.setCursor(0, 0);
lcd.print("LCD example");
}
void loop() {
// Update the LCD content
lcd.setCursor(0, 1); // Second line
lcd.print(millis() / 1000); // Display the elapsed time in seconds
delay(1000);
}If you don't know the address of your display's I2C adapter, try finding it with the code below. Most use address 0x3F or 0x27.
Code:
#include <Wire.h>
void setup() {
Wire.begin(4, 5); // Initialize I2C
Serial.begin(115200);
while (!Serial); // Wait for the serial monitor to initialize
Serial.println("\nI2C Scanner");
}
void loop() {
byte error, address;
int nDevices = 0;
Serial.println("Scanning...");
for (address = 1; address < 127; address++) {
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0) {
Serial.print("Device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
Serial.println(" !");
nDevices++;
}
else if (error == 4) {
Serial.print("Unknown error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("Scan complete\n");
delay(5000); // Wait 5 seconds before scanning again
}RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - admin - 02-06-2025
(01-31-2025, 05:50 PM)Cesarcardca Wrote:(01-31-2025, 07:42 AM)admin Wrote: because you have not define the i2c bus SDA and SCL pin for ESP32.
these instructions are supposed to be for that. i got it from the Di and DO example on the forum.
PCF8574 pcf8574_1 (0x22, 4, 5) and
PCF8574 pcf8574_2(0x21, 4, 5) is for inputs. right?
is that what you mean?
do you have tested with our demo source code? https://www.kincony.com/forum/showthread.php?tid=1620
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - Cesarcardca - 02-08-2025
I already managed to use inputs and outputs and the 20x4 LCD. thank you so much.
I just need to know how to connect a GPIO input with attachInterrupt.
can you help me please?
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - admin - 02-09-2025
KC868-A16 not need to use Interrupt pin for PCF8574, pull is enough for read input state.
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - Cesarcardca - 02-09-2025
(02-09-2025, 02:46 AM)admin Wrote: KC868-A16 not need to use Interrupt pin for PCF8574, pull is enough for read input state.
I know, But I need the program to be interrupted at the point that is right at the moment when the interruption occurs. That means it must be directly from the GPIO.
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - admin - 02-09-2025
you need to solder the PCF8574 INT pin to ESP32 one free GPIO.
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - Cesarcardca - 02-18-2025
(02-09-2025, 04:16 AM)admin Wrote: you need to solder the PCF8574 INT pin to ESP32 one free GPIO.
Hello, I have been researching to be able to use a gpio as an interrupt and I see that the 433M_T pin goes directly from the stm32 IO15 to the Header 3 p7, I can use that pin since I do not need the RF circuits and by placing a pull down resistor I can obtain an interrupt in my Arduino code.
RE: PROGRAM KC868 A16 DI, DO AND LIQUID CRYSTAL FROM ARDUINO IDE - admin - 02-18-2025
it's ok use by 433M send Pin.