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Learn how to use ESP32 analog input pins using Arduino IDE. Analog pins are used to read various voltage levels. Table of Content Working of ADC ESP32 ADC ESP32 has two 12-bit SAR (Successive Approximation Register) ADCs. Channel No of Inputs GPIOs ADC1 8 32 to 39 ADC2 10 0, 2, 4, 12 to 15,…

Table of Content Pulse Width Modulation (PWM) ESP32 has Five Power Modes: Power Mode CPU Wi-Fi/Bluetooth RTC Memory & Peripherals ULP Power Consumption Active Mode ON ON ON ON Refer [RF Modes] Modem-Sleep Mode ON OFF ON ON 20 mA to 68 mA Light-Sleep Mode PAUSE OFF ON ON 0.8 mA Deep-Sleep Mode OFF OFF…

Learn how to change the CPU frequency of ESP32 using Arduino IDE. We will explain methods for reading and changing the CPU frequency. Optimizing CPU speed can significantly impact performance and power consumption, and changing the clock speed can significantly change the power consumption of IoT devices. Why to Change CPU Speed? Exploring why adjusting…

In this example, we will see how to create a simple web server using ESP32. We will see how to control LED wirelessly using a mobile or laptop. Overview ESP32 has 10 capacitive-sensing GPIOs, which detect variations induced by touching or approaching the GPIOs with a finger or other objects. The low-noise nature of the…

ESP32 comes with a dual-core processor. The dual-core processing provides efficiency in terms of performance as well as power consumption. In this post, we’ll explore how to access both cores on the ESP32 and compare the performance between single-core and dual-core operations. ESP32 Power Modes ESP32 has Five Power Modes: Power Mode CPU Wi-Fi/Bluetooth RTC…

Learn how to use ESP32 external interrupts using Arduino IDE. We will explain the example of an external interrupt with a button and LED. We will further discuss how to set the trigger event type and priority. Table of Content Why interrupts are important ? Let’s look at a straightforward example. Imagine you have an…