ESP8266 Community Forum

- Thu Jul 14, 2016 7:49 am #50748

Strange enough. Are you sure that you are properly processing the interrupts events generated by PIR?
Are you coding in Arduino IDE or something else? Take a look at my code for an idea how can be done, even if is not C++.

I am using the Arduino IDE yes and the Arduino library, sorry for delayed reply will do thanks.

Amazing selection of ESP8266 and ESP32 modules can be found here.

- Thu Jul 14, 2016 8:28 am #50749 Hi, I had to tape up any exposed parts on the PIR (all part from the plastic bulb) and then wrap in aluminium cooking foil to stop the ESP trigering the PIR.

- Thu Jul 14, 2016 10:37 am #50752

Hi, I had to tape up any exposed parts on the PIR (all part from the plastic bulb) and then wrap in aluminium cooking foil to stop the ESP trigering the PIR.

Remember as I said above in thread that you need to keep 4-5 cm distance from ESP to avoid false triggering. Also shielding might work

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/

- Thu Jul 14, 2016 1:47 pm #50759

If you have a separate "Main Application MCU" (the Atmega in your case) then just use one digital I/O pin of it to do the power ON/Off for the ESP8266.
On the Atmega Software side you just need to add your new "Transmitter ON" or "Transmitter OFF" functions (aka PIN High/Low or Low/High, depending on the MOSFET type you want to use for ESP8266 Power switching) and that's it. I will suggest you a P-MOSFET and high side switching but it's your choice, you know better your setup.

The way I have done this as I don't have a P-Mosfet is using 3 220 resistors as a voltage regulator which I read should work, from port b4 on ATMEGA328p-pu when motion is detected I first apply power to CH_PD wait 1000 ms and then send serial and then stop the power the CH_PD , the esp just flashes the blue light quite fast, no data is received on the broker should I be waiting longer for the esp to boot up ?

Amazing selection of ESP8266 and ESP32 modules can be found here.