Help with ESP32 Deep Sleep

[RTX 3090]

Hi, I have written some code that uses a Pm2.5 sensor and a PIR sensor. I want it to check air quality when motion is detected. The code works normally when I let it run all the time, but I want to deep sleep it to save power when there is no motion, now it does not work. Can someone tell me why my code does not work ? It compiles fine but never wakes up

void loop() {
  esp_deep_sleep_start();
  esp_sleep_enable_ext0_wakeup(GPIO_NUM_5, 1);
  pms.read();                   // read the PM sensor
  Serial.print(F("PM1 "));Serial.print(pms.pm01);Serial.print(F(", "));
  Serial.print(F("PM2.5 "));Serial.print(pms.pm25);Serial.print(F(", "));
  Serial.print(F("PM10 ")) ;Serial.print(pms.pm10);Serial.println(F(" [ug/m3]"));
  if (pms.pm25 > PM_THRESHOLD) {
    String message = "DeviceID : 0x0001 High PM2.5 level detected: " + String(pms.pm25) + " [ug/m3]";
    bot.sendMessage(CHAT_ID, message);
    Serial.println(message);
  }
  delay(1000);
}

 

[AbydosOne]

6 minutes ago, RTX 3090 said:

  esp_deep_sleep_start();
  esp_sleep_enable_ext0_wakeup(GPIO_NUM_5, 1);

Flip these two lines around. You need to tell it how to wake up before you put it to sleep.

[Kilrah]

This, plus when waking up the ESP is reset, so setup runs, loop runs and... you put it back to sleep straight away so your code will never run.

 

Need to only put it to sleep at the end, after having done your stuff.

[RTX 3090]

On 4/12/2023 at 4:21 PM, AbydosOne said:

Flip these two lines around. You need to tell it how to wake up before you put it to sleep.

Thanks, switched them around and it works perfectly now