ESP8266 Community Forum

- Sun Nov 13, 2016 2:22 pm #58096 Hi!

I've read a lot about the interferences of the ESP radio on the PIR Sensor, but there isn't a clear solution. I have a lot of false positives so my design doesn't work propoerly.

One solution could be low the power level of the radio broadcast, but I don't know how to do this.
Any idea?

Thanks a lot!

- Tue Nov 15, 2016 5:13 pm #58193 Hi, use insulating tape over all components (not the sensor dome) and the wrap in aluminium foil. Then dont put the ESP infont of the PIR.

- Thu Nov 24, 2016 10:50 am #58621 I had a similar issue of false positives from a PIR when used together with ESP8266. Managed to solve it by putting an RC filter on the 3.3V supply to the PIR (100 ohm resistor feeding a 100uF electrolytic capacitor in parallel with 100nF ceramic). The PIR triggers based on mV differences from two thermopiles, so I surmise it is may be sensitive to supply fluctuations which can be generated when the ESP8266 communicates.

- Mon Mar 20, 2017 4:57 am #63995 can you please provide me the code for esp+ pir sensor ...currently i am working on home automation using esp8266..the code will help me alot