Oiyagai 2pcs AM312 Mini Pyroelectric PIR Sensor Module Manual Motion Infrared IR Detector SR301

Product Information

Take a look at the AM2302 temperature sensor offset value. Use the offset value to calibrate the sensor to counteract the fact that the temperature sensor is co-located with electronics that generate (a stable amount of) heat. The DHT22 and DHT11 require external pull up resistors on the data line. To do this, solder a resistor with about 4.7kΩ (anything in the range from 1kΩ to 10kΩ probably works fine, but if you’re having issues try the 4.7kΩ recommended by the manufacturer) between DATA and 3.3V .” If you use Wagos, connect each stripped wire end to a separate Wago. Each Wago is now an “extension” of 3.3V and GND. Don’t mix them!

ESPHome is an awesome platform that allows you to easily scaffold out IOT projects with a few lines of YAML.

a&&a.mc

At this point, you are ready to go and hang it on the wall! I recommend putting rubber feet behind the sensor to create a small space between the wall and allow for extra ventilation. I guess answering my own question, I removed my load switch as well as all of the capacitors from my breadboard circuit, and the remaining am612 circuit still appears to function just fine. EM radiation can be eliminated very well, but knowledge of RF technology is of importance. Moreover, EM filtering potentially requires additional circuitry which is contrary to the desire to keep things small.

Take a look at the sensor threshold for the sound sensor and generally all the delta values. If you need more or less precise measurements, you may want to alter these values. Altering the values will impact the amount of traffic on your Wi-Fi and disk requirements for your Home Assistant instance. Higher deltas and threshold equals less traffic and less disk use. Lower deltas and threshold equals more traffic and more disk use.

Wrapping Up

To start, the PIR unit basically consist of two critical elements: the piezo electric sensor that senses infrared energy and second electronics circruitry that enables differential detection of infrared energy changes followed by either simple or advanced evaluation circuitry to judge detection or not. Your DHT pins seem clearly marked. (The pins on my DHT sensor (different manufacturer) are marked as, from left to right, + out -). The ESPHome documentation states

Then, create variables that will allow you set a timer to turn the LED off after motion is detected. // Timer: Auxiliar variables You can upload this code to your ESP32 and assemble the following schematic diagram to test it and modify the number of milliseconds to see how it works.Look in console for motion detection messages [20:24:03] stat/%topic%/PIR1 ON to verify everything is working You need a Micro-USB travel charger or simply a Micro-USB cable connected to an existing power source. Please use a safe power supply!

If you like programming the ESP32 and ESP8266 boards with MicroPython, and you want to learn more, please take a look at the following resources: The PIR sensor is a very low power device (15μA). I don’t know if the flux residue may affect it’s stability so I sprayed it with flux remover and scrubbed off all the solder debris. This left it looking much cleaner and didn’t affect the plastic lens. If your sensor has an extra part as marked with the red cross in the figure; simply use pliers and break it away before you start. You need all the space you can get. Twist one end of each wire and pass it through the indicated holes in the board, tie the wires and use insulation tape to keep them apart and in place.

Usea low noise power supply (some extra power supply decoupling capacitors in addition to the thoseon the module areadvisable). when the motion sensor is triggered or the button is pressed all outputs should turn on. if the button is pressed again, outputs should turn off.