Messages posted by: xsdv260

Since my post was deleted on lowpowerlab's forum, I'll post the solution here. Felix didn't like that I was using non-LowPowerLab equipment. Seems odd to delete the solution since his users experience the same problem.

The solution was to use the H pin on the PIR to power it (see URL below for instructions) and to also briefly power off the PIR while radio transmits and right after coming out of sleep. I added a capacitor to power the PIR for the brief time I shutdown the PIR power pin. Below is sample code. Please note that the shutdown of the PIR was suggested by a user from lowpoerlab forum. I do not take credit. I just want to help anyone that may have the same issue.

http://techgurka.blogspot.com/2013/05/cheap-pyroelectric-infrared-pir-motion.html

found the solution to the problem.

https://lowpowerlab.com/forum/index.php/topic,1798.0.html

In my project I have a DHT temperature/humidity sensor and a PIR(motion sensor). I'm transmitting the data those two sensors receive to another device. When I transmit the data with the "radio.sendWithRetry" the pin connected to the PIR goes "high" or reads 3.3 volts and triggers a false positive movement of the sensor. I've tried moving my PIR sensor to different pins but each time I notice the same thing. I'm using the miniWirelessHW-915 for this project. Below is my code. Please help and thank you in advance.

#include <dht.h>

//Start RFM69 Specific Code -------------------------------------------------------------------------------------------------
#include <RFM69.h>
#include <SPI.h>
#define NODEID        10    //unique for each node on same network 1X=basement 2X=Main Level
#define NETWORKID     14  //the same on all nodes that talk to each other
#define GATEWAYID     1
#define FREQUENCY     RF69_915MHZ
#define ENCRYPTKEY    "WIRELESSKEY" //exactly the same 16 characters/bytes on all nodes!
#define IS_RFM69HW    //uncomment only for RFM69HW! Leave out if you have RFM69W!
#define ACK_TIME      30 // max # of ms to wait for an ack
#define LED           9  // Moteinos have LEDs on D9
#define SERIAL_BAUD   115200  //must be 9600 for GPS, use whatever if no GPS

//Device IDs- 2=PIR 3=Magnet 4=Temp/hum 5=IR Sensor 6=Light Sensor
typedef struct {		
  int           nodeID; 		//node ID
  int			deviceID;		//sensor ID (2, 3, 4, 5, 6)
  unsigned long var1_usl; 		//uptime in ms
  float         var2_float;   	//sensor data?
  float			var3_float;		//battery condition?
} Payload;
Payload theData;

char buff[20];
byte sendSize=0;
boolean requestACK = false;
RFM69 radio;
// End RFM69 Specific Code -------------------------------------------------------------------------------------------------

int PIRinputPIN = 7;
int pirState = LOW;
int val = 0;
dht DHT;
#define DHT22_PIN 6

void setup() {
  Serial.begin(SERIAL_BAUD);
  Serial.println("Serial Started");
  theData.nodeID = NODEID;
  radio.initialize(FREQUENCY,NODEID,NETWORKID);
  radio.setHighPower(); 
  radio.encrypt(ENCRYPTKEY);
  char buff[50];
  sprintf(buff, "\nTransmitting at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
  Serial.println(buff);
  pinMode(PIRinputPIN, INPUT);
  theData.nodeID = 10; 
  delay(10000); //PIR needs to calibrate
}

void loop() {
    //------------------------------------------------------------------------------
  //deviceID = 2 for PIR
  //------------------------------------------------------------------------------
  
  val=digitalRead(PIRinputPIN);
  if (val == HIGH && pirState == LOW)
  {
      Serial.println("MOTION DETECTED!!!!");
      theData.deviceID = 2;
      theData.var2_float = val;
      radio.sendWithRetry(GATEWAYID, (const void*)(&theData), sizeof(theData));
      pirState = HIGH;
  }
  else if (val == LOW && pirState == HIGH)
  {
    Serial.println("No more motion");
    theData.deviceID = 2;
    theData.var2_float = val;
    radio.sendWithRetry(GATEWAYID, (const void*)(&theData), sizeof(theData));
    pirState = LOW;
   }
   delay (10000);
  //------------------------------------------------------------------------------
  //deviceID = 4 for temp/humidity
  //------------------------------------------------------------------------------
  Serial.println("DHT.read");
  DHT.read22(DHT22_PIN);
  delay(2000);
  Serial.println("DHT.humidity");
  float h = DHT.humidity;
  delay(2000);
  float t = DHT.temperature;
  Serial.println("DHT.temperature");
  delay(2000);
  t = t * 1.8 + 32;
  Serial.print("Temp/Hum: ");Serial.print(t); Serial.print("F / "); Serial.print(h); Serial.print("%");Serial.println(" ");
  delay(2000);
  theData.deviceID = 4;
  theData.var2_float = t;
  theData.var3_float = h;
  radio.sendWithRetry(GATEWAYID, (const void*)(&theData), sizeof(theData));
  delay (10000);
}