USE PCF8574 FOR ESP32 INPUT PORTS - Printable Version +- Smart Home Automation Forum (https://www.kincony.com/forum) +-- Forum: Technical Support (https://www.kincony.com/forum/forumdisplay.php?fid=1) +--- Forum: Home automation training courses (https://www.kincony.com/forum/forumdisplay.php?fid=18) +--- Thread: USE PCF8574 FOR ESP32 INPUT PORTS (/showthread.php?tid=2548) Pages:
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USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 02-01-2023 USE PCF8574 IIC EXTEND GPIO FOR ESP32 INPUT PORTS Hello, I am very new working with Kincony 868 A8 I have downloaded the instructions from lesson 20 for installing input ports and copied them in e new sketch. After uploading I see that all 8 Inports give "pressed key", continiously. Making contact between ground and 1 port (1 to 8) give no change. The serial monitor stays announcing all ports "pressed key". Type : Kincony 868 A8 V1.5 Thanks What is wrong? RE: USE PCF8574 FOR ESP32 INPUT PORTS - admin - 02-02-2023 you can use this arduino demo code for PCF8574 INPUT function test: https://www.kincony.com/forum/showthread.php?tid=1609 here are all source code for KC868-A8: https://www.kincony.com/forum/forumdisplay.php?fid=23 see this zone is correct. RE: USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 02-02-2023 Hello, it was that what I have done first time. I installed and loaded up 8574-DI but the result is that all 8 buttons stays continiously on "pressed button" RE: USE PCF8574 FOR ESP32 INPUT PORTS - admin - 02-02-2023 do you have defined IIC pins in arduino config file. you'd better upload screen error image. RE: USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 02-02-2023 Hello, there is no error message. The screen shows every 0,3 sec for all 8 relais :"Key 1...8 pressed". You can only stop the text by switching out the power. Hello, I have tried again. The serial monitor writes : Init pcf8574...OK KEY1 PRESSED KEY2 PRESSED..... KEY8 PRESSED KEY2 PRESSED KEY2 PRESSED..... continiously IC adress in sketch : PCF8574 pcf8574(0x22,4,5) I made a copy of the download 8574-DI... RE: USE PCF8574 FOR ESP32 INPUT PORTS - admin - 02-05-2023 post your code, i will test on your code by KC868-A8. RE: USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 02-05-2023 /* KeyPressed on PIN1 by Mischianti Renzo <http://www.mischianti.org> https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/ */ #include "Arduino.h" #include "PCF8574.h" // Set i2c address PCF8574 pcf8574(0x22,4,5); unsigned long timeElapsed; void setup() { Serial.begin(115200); delay(1000); // pcf8574.pinMode(P0, OUTPUT); pcf8574.pinMode(P0, INPUT); pcf8574.pinMode(P1, INPUT); pcf8574.pinMode(P2, INPUT); pcf8574.pinMode(P3, INPUT); pcf8574.pinMode(P4, INPUT); pcf8574.pinMode(P5, INPUT); pcf8574.pinMode(P6, INPUT); pcf8574.pinMode(P7, INPUT); Serial.print("Init pcf8574..."); if (pcf8574.begin()){ Serial.println("OK"); }else{ Serial.println("KO"); } } void loop() { uint8_t val1 = pcf8574.digitalRead(P0); uint8_t val2 = pcf8574.digitalRead(P1); uint8_t val3 = pcf8574.digitalRead(P2); uint8_t val4 = pcf8574.digitalRead(P3); uint8_t val5 = pcf8574.digitalRead(P4); uint8_t val6 = pcf8574.digitalRead(P5); uint8_t val7 = pcf8574.digitalRead(P6); uint8_t val8 = pcf8574.digitalRead(P7); if (val1==LOW) Serial.println("KEY1 PRESSED"); if (val2==LOW) Serial.println("KEY2 PRESSED"); if (val3==LOW) Serial.println("KEY3 PRESSED"); if (val4==LOW) Serial.println("KEY4 PRESSED"); if (val5==LOW) Serial.println("KEY5 PRESSED"); if (val6==LOW) Serial.println("KEY6 PRESSED"); if (val7==LOW) Serial.println("KEY7 PRESSED"); if (val8==LOW) Serial.println("KEY8 PRESSED"); delay(300); } RE: USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 02-28-2023 Hello, As nobody finds the reason and as you can see that the result is as 2 is closed without a connection between ground and input 2 there must be a electrical short circuit in the Kincony A8! It is the second failure of a Kincony A8 on two peaces. Kind regards RE: USE PCF8574 FOR ESP32 INPUT PORTS - admin - 03-01-2023 this code is work fine, but you have changed, so your board not work well. 8574-DI.zip (Size: 650 bytes / Downloads: 171) NOT use " PCF8574 pcf8574(0x22,4,5); " our code is "PCF8574 pcf8574(0x22);" I have told you need set pin define in your arduino config file: we use NodeMcu-32S board, so do as these photos will be work fine: RE: USE PCF8574 FOR ESP32 INPUT PORTS - GVDC - 03-08-2023 Hello, thanks for your help, but the same result as before. Key 2 is always closed. An other question : instead of KC868 A8 do there exist also one with 10 or 12 relais? Or can you connect 2 more relays on the KC868 A8? Kind regards. |