pir sensor with esp8266

README.md

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+# PIR Sensor
+
+* Schematic
+  + ![](.\Pirschematic.png)
+* [Datasheet](.\BISS0001-SilvanChip.pdf)
+* [ESP8266](.\esp8266.md)

esp8266.md

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+# ESP8266
+
+* [Reference](https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/)
+* ![](.\esp8266-pinout.JPG)
+* Best Pins to Use
+
+Label | GPIO | Input | Output | Notes
+---|----|----|----|----|----
+D0 | GPIO16 | no interrupt | no PWM or I2C support | HIGH at boot used to wake up from deep sleep
+D1 | GPIO5 | OK | OK | often used as SCL (I2C)
+D2 | GPIO4 | OK | OK | often used as SDA (I2C)
+D3 | GPIO0 | pulled up | OK | connected to FLASH button, boot fails if pulled LOW
+D4 | GPIO2 | pulled up | OK | HIGH at boot connected to on-board LED, boot fails if pulled LOW
+D5 | GPIO14 | OK | OK | SPI (SCLK)
+D6 | GPIO12 | OK | OK | SPI (MISO)
+D7 | GPIO13 | OK | OK | SPI (MOSI)
+D8 | GPIO15 | pulled to GND | OK | SPI (CS) Boot fails if pulled HIGH
+RX | GPIO3 | OK | RX pin | HIGH at boot
+TX | GPIO1 | TX pin | OK | HIGH at boot debug output at boot, boot fails if pulled LOW
+A0 | ADC0 | Analog Input | X