ESP8266 External Interrupts

Question

I need to publish state of a switch (1/0) to an MQTT broker. I am planning to put it to deepsleep since this is a battery operated application. Is there a way to awake ESP8266 from deepsleep using external interrupts?

When the state of the switch changes, ESP awakes and transmits switch state to MQTT broker. After that it again goes to deepsleep.

I found no information about external interrupts in ESP. As I got to know, only clock is ON during deepsleep and not sure whether my goal is feasible. If not, I would be glad if you can please suggest an alternative for this (using ESP).

Lakmal

I'm voting to close this question as off-topic because it is about electronic circuitry rather than programing. — Fraser, Oct 20 '16 at 16:14

score 1 · Accepted Answer · answered Oct 20 '16 at 16:12

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Sure, see the discussion here, basically if CH_DP goes high the chip wakes up.

answered Oct 20 '16 at 16:12

Fraser

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score 0 · Answer 2 · answered Oct 19 '17 at 02:06

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You can also try my solution here. I use one transistor to enable interrupt to reset after ESP wakeup from deepsleep.

answered Oct 19 '17 at 02:06

Tomsim

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Please include the essential content of the link in the answer. – Ibo Oct 19 '17 at 02:27

ESP8266 External Interrupts

2 Answers2