ESP32 vs ESP8266-difference between ESP32 and ESP8266 wifi

February 4, 2021by admin

esp32 vs esp8266 memory

In this article, we’ll compare the ESP32 with the ESP8266 and cover the pros and cons of each board. ESP-07 is an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) and TCP/IP stack with DNS support as well. I would love to know what project you plan on building or have already made with the Arduino or ESP32. In this article, I have shown you the specification of ESP Board and Arduino Board, and how ESP32 is faster than ESP8266 and Arduino boards. Here are the results from the speed tests I ran comparing the speed of the ESP32 vs ESP8266 vs Arduino Mega2560 vs Arduino Uno boards.

In parallel one core can be used with Bluetooth to do some operation another kit can be used simultaneously to control a stepper motor. I have a very detail tutorial on how to install the ESP32 Board and how to write your first program to control an LED. The ESP8266 has a built-in processor, but because of the multitasking involved in updating the Wi-Fi stack, most applications use a separate microcontroller for interfacing with the sensors, digital I/O and processing data. While using the ESP32, you may not need to use an additional micro-controller as the ESP32 has dual 32-bit microprocessors and will run on breakout boards and modules from 160 MHz up to 240MHz. This provides enough speed for any application that requires a microcontroller with connectivity. Using ESP32 or ESP8266 bare chips is not easy or practical, especially when testing and prototyping.

In general I always prefer ESP based boards when a battery is the power supply. It features an ultra-low power co processor which in deep sleep mode can work up to years on a single battery. It has integrated power amplifiers, low noise amplifiers, advanced security system and a 2.5GHz dual mode WiFi and Bluetooth module. All these features inside a tiny, printed board which is not only cheaper than an Arduino Uno but half the size of it.

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As a result, he made the ESP8266 give out a signal at 60 MHz, which corresponds with the frequency of the third channel on analog TV. As we’ve already mentioned, the Espressif ESP8266 is a very popular, accessible platform for the implementation of energy-efficient IoT apps that operate based on a Wi-Fi connection. In general, the ESP8266 and ESP32 controllers do not compete with each other – they perform different tasks. We cannot compare esp32 vs 8266 directly, they are just designed to do different jobs, like a shovel and excavator. Each IoT application or home device requires a proper microcontroller and ESP series are very good to choose from.

What is the difference between ESP8266 memory and ESP32?

The ESP32 is better than ESP8266. It provides you with a faster processor and good memory size, which allow considerable larger projects to be designed on only one SOC. ESP32 provides you with reliable and hi-tech security.

It has Wi-Fi and Bluetooth radio channels, a dual-core microcontroller, a rich set of built-in peripherals, and is a certified “FCC part 15.247”. ESP 8285 with almost the same price provides more resources and performance, compared with ESP8266. ESP8285 has ultra-low power 32-bit MCU with 16-bit RISC core, and WiFi b/g/n/d/e/i/k/r connections. ESP8266 power consumption is comparatively low for such solutions with WiFi. Also, it has a very good option to go into sleep mode, where power consumption is unbelievably low (1.0 mW). The microcontroller usually lacks a full-fledged operating system.

In this case, we’ll just save the LED state, so the EEPROM size is set to 1. To read a byte from the flash memory, you use the function. This function takes the address of the byte you want to read as an argument. Having added a wire serving as a transmitting antenna to the existing body, Charles also made the module’s processor dynamically generate 3D demo scenes.

Comparison of ESP32 and ESP8266 NodeMcu:

But when you need the speed of the native SDK, it’s nice to be able to lean on the extant ESP32 codebase, so an ESP8266 in ESP32’s clothing is a winner. Sharing the peripheral set with the ESP32 will help alleviates some of these woes on the ESP32-C3, even though it has the same number of pins as the ESP8266. Heck, if you’re willing to allocate them, the C3 even has JTAG capabilities. And while the JTAG isn’t, a lot of the hardware peripherals are assignable to whichever pins you wish. While running this test, we also hooked up our super-sophisticated power measuring unit to the devices under test, a USB cable with three 3 Ω resistors and an oscilloscope.

The most trivial way to use it is to control system-connected sensors. The programmed ESP8266, basically, sends HTTP requests to the server where they are processed in a particular way and then are sent back to the sensors to enable certain actions. Some time ago, in the fall of 2015 to be exact, the Espressif team of developers launched an enhanced successor of the super-popular chip – the ESP32 and other modules based on it. The ESP8266 microcontroller from the Chinese manufacturer Espressif is one of the most popular solutions for IoT-based applications that works through a Wi-Fi receiver. It is intended to launch apps stored in its memory and makes a great foundation for quite advanced Wi-Fi device control systems. On the other hand, the rapid proliferation of Espressif microcontrollers has increased not only their cost but also the availability of integration with the popular Arduino IDE development environment.

A few lines of code in C++ for the ESP32 can get us connected to a Wi-Fi network and Internet server so that we can begin our journey of creating a custom IoT platform! While all ESP32 devices work in nearly identical ways, the specific device that will be used in the series to come will be the Adafruit Huzzah32. Summarizing our brief overview, we can say that the ESP8266 is an excellent budget Wi-Fi-based microcontroller but  if you need something more energy-efficient and compatible with Bluetooth, consider its successor – the ESP32 module. Both the ESP8266 and ESP32 SoC microcontrollers provide hobbyists with an Internet communication device, but the ESP32 is a slightly better option. In any case, both devices are good representatives of their niches.

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This section will provide information about the CPU, clock, and speed-wise difference between ESP32 and Arduino Uno. You can also refer to the Arduino Uno Schematic diagram for details of components present on the Arduino UNO board. You can refer to the ESP32 Schematic diagram  for more details about the components present on the ESP32 board. Home Automation using ESP8266 eBook and video course » Build IoT and home automation projects. Home Automation using ESP8266 eBook and video course » Build IoT and home automation projects. Flash memory and EEPROM memory are non-volatile (the information persists after the power is turned off).

What is the advantage of ESP8266 over ESP32?

The ESP8266 is cheaper than the ESP32; The ESP8266 has a wider community (although we don't think that at this point, the difference is that big); For many IoT and Wi-Fi projects, the ESP8266 can do the job for a lower price; Both boards can be programmed using Arduino IDE or other supported IDEs.

In particular, using GPIO contacts, you can program a module to turn lighting diodes or relays on/off. Algorithms can also be created with the help of a USB–TTL converter, through contacts, for subsequent communication (RX and TX) or Arduino circuits (for instance, Arduino Uno). ESP microcontrollers are indispensable for prototyping IoT solutions and building fast projects for private use and in small business solutions with a short life cycle. Microcontroller programming is usually done in assembler or C, although there are compilers for other languages, such as microPython or Lua. The Reset button, labeled RST and placed in the upper left corner, is used to reset the ESP8266 chip.

Sometimes a lot of people find it confusing to choose between them. So here in this lesson we will discuss a brief comparison between them. Development & break-out boards extend wiring and may add functionality, often building upon ESP32 module boards and making them easier to use for development purposes (especially with breadboards). The ESP32-PICO-D4 system in package module combines an ESP32 silicon chip, crystal oscillator, flash memory chip, filter capacitors, and RF matching links into a single 7 mm × 7 mm sized QFN package. For the end user, it doesn’t matter all that much, but if saving money on IP licensing fees is what allows Espressif to include a more modern peripheral set for the ESP8266 price, then we’re all for it.

The operating voltage of the ESP microprocessors is 3.3 V compared to the Arduino operating voltage of 5V. If the boards are used while connected to the socket, there will be no difference in the power consumption because the current will be reduced to gather the same amount of power. In case of a battery powered use case the difference will be much greater because if the battery discharging curve falls below the operating voltage, the microprocessor will shut down.

This snippet of code is based on the pushbutton debounce sketch example from the Arduino IDE. Then, you just need to turn the LED ON or OFF accordingly to the value read from the flash memory. This is a debounce code that changes the LED state every time you press the pushbutton. But there’s something special about this code – it remembers the last LED state, even after resetting or removing power from the ESP32. Let’s see what you have to do to make the ESP32 remember the last state of a GPIO. To solve this problem, you can save the lamp’s state in the flash memory.

Conclusion of the microcontroller comparison

This was a quick guide showing you how to erase the ESP32 flash to perform a factory reset. Copy the following code to the Arduino IDE and upload it to your ESP32. Before proceeding with this tutorial you should have the ESP32 add-on installed in your Arduino IDE.

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A notable difference with the ESP32 is its Bluetooth capability that allows the ESP32 to not only be limited to Wi-Fi communication, allowing it to be integrated into more projects. The single core L106 Xtensa processor includes 32KB of instruction memory space, 16 GPIO pins and multiple communication protocols like UART, SPI, I2C and an Analog to Digital (ADC) converter. The Internet of Things (IoT) recently has gained acceptance in academic and industrial fields. In 2014 the Espressif Systems released the ESP8266 IoT board and later in 2016 they released the advanced version which they named as ESP32. Till this day both these ESP boards are leading IoT based microcontrollers boards.

esp32 vs esp8266 memory

This page compares ESP32 vs ESP8266 and mentions difference between ESP32 and ESP8266 wifi based boards. Both similarities and difference between ESP32 and ESP8266 boards are also mentioned. The ESP32 and ESP8266 are low-cost Wi-Fi modules that are ideal for Internet of Things (IoT) and Home Automation projects.

Moreover, the ESP32 is a reliable board, granted its firmware and connected peripherals may at times be unreliable. The larger memory capacity and greater processing power also make secure sockets layer (SSL) connections more viable which are essential requirements in a world where security is paramount. ESP32 devices generally have more GPIO to work with which make them more useable in complex projects.

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It also has some go to features like capacitive touch GPIO pins, hall effect sensor and temperature sensor, so ESP32 is the way to go. Seeing all the above comparisons, ESP32 is by far better than ESP8266. As it leads in most of the features with a greater number of CPU cores, faster WiFi and Bluetooth support. And not only that it comes with double the number of GPIO pins compared to ESP8266.

Robin Mitchell is an electronic engineer who has been involved in electronics since the age of 13. After completing a BEng at the University of Warwick, Robin moved into the field of online content creation esp32 vs esp8266 memory developing articles, news pieces, and projects aimed at professionals and makers alike. Currently, Robin runs a small electronics business, MitchElectronics, which produces educational kits and resources.

Then, you just need to add a condition at the beginning of your sketch to check the last lamp state, and turn the lamp on or off accordingly. In this microcontroller comparison I compare in total 8 different boards and I give you my suggestion, which board to use based on different use cases. Are you looking to implement a high-quality IoT-based solution?

  • It has a modified Harvard architecture 8-bit RISC processor single-core CPU.
  • We’ve got pre-production samples, and Espressif is still working on supporting all the features of the ESP32-C3 in the IDF.
  • I will give you an overview of different Arduino boards which are the most popular boards on the market as well as ESP32 and ESP8266 boards which are also very often used.
  • We recommend ESP32 because it is a more advanced version with more security.
  • Since many ESP32 development boards come with small cameras, this suggests that the ESP32 is a very capable board.

In addition, you can employ the ESP8266 in quite complex domestic automation solutions – for example, for managing wireless sensors, light dimmers, and switches, electric water flow on/off systems, thermostats, or any other IoT sensors. You can try to repeat this experiment of the creation of an analog television transmission unit. To program ESP8266 controllers, there is a real-time SDK ESP8266_RTOS_SDK. In fact, between ESP8285 and ESP32, there is also an intermediate solution ESP8285.

esp32 vs esp8266 memory

The ESP32-C3 is a lot more like a reduced version of the ESP32 than it is like an improvement over the ESP8266, even though it’s probably destined to play the latter role in our projects. If you count in the new ESP32-S3 that brings in USB, the ESP32 family is bigger than just one chip. Although it does seem odd to lump the RISC-V and Tensilica CPUs together, at the end of the day it’s the peripherals more than the CPUs that differentiate microcontrollers, and on that front the C3 is firmly in the ESP32 family. The Arduino boards don’t have wireless connectivity, Bluetooth, and touch sensors. The ESP32 is a powerful 32-bit microcontroller with integrated Wi-Fi, a full TCP/IP stack for internet connection, and Bluetooth 4.2. In summary, in this unit you’ve learned how to save data in the ESP32 flash memory using the EEPROM library.

What is the disadvantage of ESP32?

  • I2C at 100 kHz bus frequency runs slowly. The default I2C bus clock speed is 100 kHz (100000) .
  • No DAC-based audio output. Current versions of the ESP-IDF SDK do not have the required APIs for DAC-based audio output.
  • Deep Sleep & Wake-up sources.


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