External GPIO Wake-Up
This example uses GPIO12 as the external wake-up source. How It Works Additional Notes Since RTC memory is not used and an external GPIO is used to wake…
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ESP32A collection of 50 posts
Touchpad Wake-Up
Here’s how you can wake up the ESP32 from deep sleep using Touchpad T3: ESP32 Deep Sleep Wake-Up via Touchpad T3 **How It Works Since the TouchPad is…
ULP Wake-Up
The ULP (Ultra-Low-Power Coprocessor) coprocessor is a specialized processor built into the ESP32 to handle tasks while the main CPU is in deep sleep or hibernation. The main…
Memory in Deep Sleep
RTC (Real-Time Clock) memory is a small portion of memory in the ESP32 that remains powered during deep sleep. It allows data retention while keeping power consumption low….
Memory in Hibernation
RTC memory cannot be used in Hibernation Mode, but data can be saved persistently using flash storage. Which One to Use? Feature RTC Memory (RTC_DATA_ATTR) Preferences (NVS) Retained…
RTC GPIO
The RTC GPIOs are part of the RTC (Real-Time Clock) controller and remain active even when the main CPU is in deep sleep. This allows you to keep…
LED Control Panel
We have learned how to display dynamic information using a Web Server. In this project, we will take it a step further by enabling interaction with the user…
MultiWiFi
MultiWifi is a feature or technique used to allow the ESP32 to connect to multiple Wi-Fi networks. The idea is that the device can automatically switch between available…
Useful Wifi Code
Here’s an example of how to manually set up the ESP32 in STA (Station) mode, configure a static IP address, gateway, and DNS, and then print out all…