FcallBox PIR SENSOR

DESCRIPTION

Motion sensor based on PIR HC-SR501.
temperature and humidity sensors.
Link RF 2.4GHz.

Sensor based on carrier board for Arduino Pro mini described here
RF board: NRF24L01 + 2.4GHz Wireless RF Transceiver
Temperature sensor DS1721 -55°C à +125°C with precision 0.0625°C
Humidity sensor DHT11 20 to 80% (relative humidity) +/-5% or DHT22 for external use
Motion sensor PIR HC-SR501, distance 3 to 7m, angle 140°, detection time 5s to 3mn.

The main application is a Motion sensor with temperature and humidity sensors with Radio link, it is used in the FCALLBOX DOMOTIC SYSTEM

described here

Arduino on carrier

Remove the 2 leds and the rebulator on the red circles to decrease the consumption

Modification to control RF module power

To reduce the consumption at minimum, add a PNP MMBT5401 and a 100R

Modification to reduce noise for RF module

Add a 10uF and 200uF 6V3 min.

Parts :

Front design to fix with adhesive tape

View with pile 3V CR123A + carrier + Arduino + RF module

Wiring

Assembly

Box closed

The project has to be compiled and loaded with Arduino IDE

Change the sensor number : int temp_number = 1; // write here the Movement sensor number
Modify this line to adapt to sensor DHT22 or DHT11 :
#define DHTTYPE DHT22 // DHT11 DHT 22 (AM2302), AM2321
Verify the lines :
bool MOTION = true;
bool SENSOR = true;

Here are the 3D models :