journal/stockcropper/433MHz.md

Sketch:

// Arduino script using RCSwitch library to decode EV1527 OOK signals on pin 2

  

#include <RCSwitch.h>

  

RCSwitch mySwitch = RCSwitch();

  

void setup() {

  Serial.begin(115200);  // Serial output at 115200 baud for clarity

  while(!Serial);

  mySwitch.enableReceive(0);  // Receiver on interrupt 0 => pin 2

  Serial.println("Ready to receive EV1527 signals...");

}

  

void loop() {

  if (mySwitch.available()) {

    if (mySwitch.getReceivedBitlength() == 24) {  // Filter for EV1527's 24-bit messages

      unsigned long value = mySwitch.getReceivedValue();

      Serial.print("Received EV1527 packet: ");

      Serial.print(value);  // Decimal value

      Serial.print(" (Hex: ");

      if (value < 0x100000) Serial.print("0");  // Pad for consistent hex output

      Serial.print(value, HEX);

      Serial.print(")");

      Serial.print(" / ");

      Serial.print(mySwitch.getReceivedBitlength());

      Serial.print(" bits / Pulse length: ");

      Serial.print(mySwitch.getReceivedDelay());  // Typical: ~275-350 µs

      Serial.print(" µs / Protocol: ");

      Serial.println(mySwitch.getReceivedProtocol());  // Should be 6 for EV1527

      delay(500);  // Delay to prevent flooding from repeated transmissions

    }

    mySwitch.resetAvailable();

  }

}

output:

08:53:19.607 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:21.379 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 354 µs / Protocol: 1
08:53:24.444 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:25.552 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 349 µs / Protocol: 1
08:53:26.427 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 353 µs / Protocol: 1
08:53:27.054 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 353 µs / Protocol: 1
08:53:27.733 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:28.490 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:30.107 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:30.966 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:32.402 -> Received EV1527 packet: 6098020 (Hex: 5D0C64) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:34.361 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:34.915 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 353 µs / Protocol: 1
08:53:35.526 -> Received EV1527 packet: 6098020 (Hex: 5D0C64) / 24 bits / Pulse length: 355 µs / Protocol: 1
08:53:36.400 -> Received EV1527 packet: 6098024 (Hex: 5D0C68) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:49.512 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:51.189 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 354 µs / Protocol: 1
08:53:52.344 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:53.030 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:53.549 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 354 µs / Protocol: 1
08:53:54.431 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:53:55.606 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 352 µs / Protocol: 1
08:53:56.782 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 353 µs / Protocol: 1
08:53:57.801 -> Received EV1527 packet: 6098018 (Hex: 5D0C62) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:54:05.964 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 353 µs / Protocol: 1
08:54:06.525 -> Received EV1527 packet: 6098017 (Hex: 5D0C61) / 24 bits / Pulse length: 349 µs / Protocol: 1
08:54:08.224 -> Received EV1527 packet: 6098020 (Hex: 5D0C64) / 24 bits / Pulse length: 350 µs / Protocol: 1
08:54:08.917 -> Received EV1527 packet: 6098020 (Hex: 5D0C64) / 24 bits / Pulse length: 351 µs / Protocol: 1
08:54:09.780 -> Received EV1527 packet: 6098024 (Hex: 5D0C68) / 24 bits / Pulse length: 350 µs / Protocol: 1
08:54:10.516 -> Received EV1527 packet: 6098024 (Hex: 5D0C68) / 24 bits / Pulse length: 351 µs / Protocol: 1

Analysis:

• button 1: 5D0C61
• button 2: 5D0C62
• button 3: 5D0C64
• button 4: 5D0C68

https://www.amazon.com/QIACHIP-Wireless-Receiver-Long-Distance-Transmitter/dp/B09P89RF8R: !

https://www.adafruit.com/product/1096: !

Gama electronics could be useful