Carlos Pascual asked 4 years ago
Hi,
Using one of yours proyects, this for example :Video Streaming Web Server, (with ESP32-CAM) I just want to add a PIR (Mini AM312 PIR Motion Sensor) to test.
The pin I´ve chosen is the 13 (I tested 12 also) and added :
//variable
const byte pinPIR = 13;
//setup()
pinMode(pinPIR, INPUT_PULLUP);
//loop()
Serial.print(digitalRead(pinPIR));
The behaviour is odd, the first one is that the pin 13 start HIGH, so PIR never works. Is this normal?
I´ve tested, same board, same pin in a simple sketch to test the PIR and work fine.
Any help will be a appreciated
Carlos Pascual answered 4 years ago
This could be the solution:
pinMode(pinPIR, INPUT);
digitalWrite(pinPIR,LOW);
But.. no success
Sara Santos Staff answered 4 years ago
Hi.
Can you show me the code snippet that reads the PIR? Are you using interrupts?
Regards,
Sara
Carlos Pascual answered 4 years ago
Hi Sara
I have also tried with interrupts, the way to use interrupt is in the esp-way not arduino-way I supose there is a conflict with esp-camera software.
The snippet is below:
static void IRAM_ATTR detectsMovement(void *arg)
{
Serial.println(“Interrupt”);
pirSensor=true;
}
void enableInterrupt()
{
esp_err_terr=gpio_isr_handler_add(GPIO_NUM_13,&detectsMovement,(void*)13);
if(err!=ESP_OK)
{
Serial.printf(“handler add failed with error 0x%x \r\n”,err);
}
err=gpio_set_intr_type(GPIO_NUM_13,GPIO_INTR_POSEDGE);
if(err!=ESP_OK)
{
Serial.printf(“set intr type failed with error 0x%x \r\n”,err);
}
}
//And run enableInterrupt() behind : esp_camera_init(&config);
//Finally in loop() :
void loop()
{
if(pirSensor)
{
digitalWrite(pinLED,HIGH);
// public a mqtt message to my broker
mqtt_pir();
pirSensor=false;
digitalWrite(pinLED,LOW);
}
Well, the behavoir is odd, each 6,7 seconds an interrupt arrive with any movement on my part. When Mini AM312 PIR Motion Sensor detect some movement, send HIGH during 5 seconds, this can be a clue.
If I load a sketch with just the PIR code with interrupts o without interrupts works fine, same board ESP32-CAM, same PIR.
Thanks in advance
Cheers
Sara Santos Staff answered 4 years ago
Hi.
I’m not sure what can be wrong. How are you powering the PIR motion sensor? Does it require 3.3V or 5V to operate?
Either there is a conflict with the PIR code and the video streaming code, or the ESP32-CAM can’t provide enough power while it is streaming video.
Meanwhile, I found a discussion about using the ESP32-CAM with PIR, video streaming, and Telegram. They share the code. Here it is (you can ignore and comment the Telegram part):
I hope this helps.
Regards,
Sara