HI folks.
I would like to wake up my ESP8266 using an interrupt from the VL53L0X sensor.
I have configured the sensor to use both threshold detection and to trigger an interrupt. I tested whether the interrupt is being triggered, and it is— the GPIO pin goes from HIGH to LOW when the threshold is reached. However, I noticed that the GPIO remains LOW until the interrupt flag is cleared. If I connect this GPIO pin directly to the RST pin of the ESP8266, the program will never run because the RST pin stays LOW.
To solve this, I implemented a pulse generator that triggers on the falling edge of the GPIO signal.
Here is the circuit I implemented:
From: https://forum.arduino.cc/t/esp8266-deep-sleep-forever-and-interrupt-wake-up/574185/20
i am using a 0.33uF capacitor instead 100uF. Resistor values are the same. The diode is a 1N4007.
In this setup, "H" represents the GPIO pin connected to the VL53L0X sensor, and the right side of the image shows the connection to the RST pin of my ESP8266 NodeMCU.
This is the board I am using: https://digitaltown.co.uk/components10VL53L0X.php
The issue is that I can't seem to reset my ESP8266 using the VL53L0X interrupt. Interestingly, if I replace the GPIO interrupt with a manually operated switch (pulled up), it works perfectly. Pressing the switch pulls the pin to ground, produces a falling edge, and the circuit generates the pulse needed for the RST pin.
I'm not sure what’s going wrong—maybe I’m overcomplicating things.
What would you recommend?
Thanks in advance!
