[Renzo Mischianti]

Hi Willian,
the code is quite complex, and I need time to check It in depth, but what is the scope of the Ticker library?
Bye Renzo

[Renzo Mischianti]

Hi Baftu,
I think you set the pointer for the structure, not the structure of single elements.
You must create a fixed structure with fixed-size elements.
Bye Renzo

[Renzo Mischianti]

Hi Elkez,
I normally describe a device module thinking of a real scenario (I don’t write to have a visit), and I select the e70 because it has RSSI and a very good Sleep mode management to manage the battery. You probably never raise a distance if a device is declared for 1.5km but has high sensitivity.
All to say, this can be considered a good solution.
There are alternatives, but the efficiency can’t be the same.

But in your case (low number of messages per second), I think it can be a good solution for a LoRa device like the e220.

Bye Renzo

[Renzo Mischianti]

Hi phnahes,
I think you can’t decode because the EByte uses a proprietary cryptography system to obfuscate the message.
Even if some people decode it for e32 (it doesn’t have a key to change the algorithm), here is the thread where you can find some information.
EByte LoRa Communication encode/decode, crypt/decrypt
I don’t know if @Sahar-2 go ahead with Its idea, but I think you can ask.
Bye Renzo

[Renzo Mischianti]

Hi,
yes, it’s quite impressive, and I start some penetration test and I notice that 4/5 wall (with meet iron) can’t block the signal.
Bye Renzo

[Renzo Mischianti]

If you want to try, I also pushed a new version that adds a lot of features and the possibility to specify the INPUT_PULLUP mode.
Bye Renzo

[Renzo Mischianti]

Hi,
I tested now this sketch

/*
 KeyPressed on PIN1
 by Mischianti Renzo <http://www.mischianti.org>

 https://www.mischianti.org/2019/01/02/pcf8575-i2c-digital-i-o-expander-fast-easy-usage/
 */

#include "Arduino.h"
#include "PCF8575.h"

// Set i2c address
PCF8575 pcf8575(0x20);
unsigned long timeElapsed;
void setup() {
	Serial.begin(115200);
	// pcf8575.pinMode(P0, OUTPUT);

	pcf8575.pinMode(P1, INPUT);

	pcf8575.begin();

  timeElapsed = millis();
}

void loop() {
	// if (millis() - timeElapsed > 2000) {
	// 	if (pcf8575.digitalRead(P0) == HIGH) {
	// 		pcf8575.digitalWrite(P0, LOW);
	// 	} else {
	// 		pcf8575.digitalWrite(P0, HIGH);
	// 	}
  //   timeElapsed = millis();
	// }
	uint8_t val = pcf8575.digitalRead(P1);
	if (val == HIGH) {
		Serial.println("KEY PRESSED");

	}
	delay(100);

}

And this sketch

/*
 KeyPressed on PIN1
 by Mischianti Renzo <http://www.mischianti.org>

 https://www.mischianti.org/2019/01/02/pcf8575-i2c-digital-i-o-expander-fast-easy-usage/
 */

#include "Arduino.h"
#include "PCF8575.h"

// Set i2c address
PCF8575 pcf8575(0x20);
unsigned long timeElapsed;
void setup() {
	Serial.begin(115200);
	pcf8575.pinMode(P0, OUTPUT);

	pcf8575.pinMode(P1, INPUT);

	pcf8575.begin();

  timeElapsed = millis();
}

void loop() {
	if (millis() - timeElapsed > 2000) {
		if (pcf8575.digitalRead(P0) == HIGH) {
			pcf8575.digitalWrite(P0, LOW);
		} else {
			pcf8575.digitalWrite(P0, HIGH);
		}
    timeElapsed = millis();
	}
	uint8_t val = pcf8575.digitalRead(P1);
	if (val == HIGH) {
		Serial.println("KEY PRESSED");

	}
	delay(100);

}

and work properly.

Can you also insert the wiring diagram?

Bye Renzo

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[Renzo Mischianti]

Hi Amaia,
I test the library, and it works correctly.
Rewrite the code as usual and retry.
Bye Renzo

[Renzo Mischianti]

Hi,
thanks for your feedback, I think your information can be very useful.
Bye Renzo

[Renzo Mischianti]

Hi,
It’s very strange; It’s more likely that there are some problems with the power supply and the pull-up resistor.
Bye Renzo

[Renzo Mischianti]

Hi,
no, restore to an external 5v power supply and try to change the pullup resistor o try to remove It.
Bye Renzo

[Renzo Mischianti]

Hi phnahes,
It’s possible that you connect on Arduino the power pin of e32 to 5v and to the esp32 to the 3.3v?
Bye Renzo

[Renzo Mischianti]

Hi Luxed,
Other people tell me that they have problems with Marlin firmware. I think it manages communication in a different way, and I think it can’t work with this implementation.
Bye Renzo

[Renzo Mischianti]

Hi Sid,
thanks for your feedback, if you can share your code, I think can be usefully for a lot of people.
Bye Renzo

[Renzo Mischianti]

Hi Andrecolz,
yes, the combination for the address is ADDH*ADDL, so 255*255.

For the max CHAN value, you must check the datasheet; every device has an It range.
Bye Renzo

[Author]

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