Re: PIR sensor - wake and sleep using CH_PD & thingspeak upd
Posted: Mon Dec 14, 2015 5:38 pm
Hi, if your PIR will run at 3.3V and your nodemcu looks like the one in the link below,
https://github.com/nodemcu/nodemcu-devkit
You should be able to take the power from the 3.3V and GND next to the flash button and use the values as shown in the post.
If your PIR is 5V you will need to make a voltage divider from 3 1K resistors or ( 1k & a 2.2K).
Output from PIR -> 1K resistor -> Input to ESP circuit -> 1K resistor -> 1K resistor -> Ground.
See this post. http://jamesreubenknowles.com/level-shi ... ments-1741
Strategy #4 & don't worry about the Danger note at the end - this was taken into account when using 1K.
https://github.com/nodemcu/nodemcu-devkit
You should be able to take the power from the 3.3V and GND next to the flash button and use the values as shown in the post.
If your PIR is 5V you will need to make a voltage divider from 3 1K resistors or ( 1k & a 2.2K).
Output from PIR -> 1K resistor -> Input to ESP circuit -> 1K resistor -> 1K resistor -> Ground.
See this post. http://jamesreubenknowles.com/level-shi ... ments-1741
Strategy #4 & don't worry about the Danger note at the end - this was taken into account when using 1K.