Comparing the ESP32 vs ESP8266 for IoT Projects: Which One is Right for You?

esp32 vs esp8266 memory

For the users of ESP32 who use it for Wi-Fi and/or BLE connectivity, ESP32-C3 is a possible upgrade option provided other requirements match. So let’s first take a look at the comparison of ESP32 and ESP32-C3 from that perspective. NodeMCU is basically a development board for ESP8266, it contains 3.3V power supply required for ESP8266 and USB to serial converter  for easy programming. With this board and a USB cable you can start your development of ESP8266.

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If you need higher processing power, more GPIO pins, larger memory resources, and a better energy-efficient design, the ESP32 may be a better choice. Both development boards have their own application space, according to the needs of the project to choose the more cost-effective can be. ESP32 devices generally have more GPIO to work with which make them more useable in complex projects.

Where to Use IoT Module?

A bootloader is a program that runs when a microcontroller is first powered on. Its job is to initialize the microcontroller and load the main application program. Microcontrollers are often connected to sensitive data and systems, so they can be attractive targets for hackers. These components typically include a central processing unit (CPU), memory, input/output (I/O) interfaces and often a radio frequency (RF) transceiver. SoCs are very common in the mobile phone industry because they allow manufacturers to pack all the necessary components for a complete phone onto a single chip.

Why use the microcontroller in IoT?

IRAM and DRAM addresses increment in the same direction unlike ESP32. Based on the application, the linker script allocates IRAM as required for the application. Hence the memory is used more efficiently in case of ESP32-C3 than ESP32. One of the main functions of ESP8266 is to host any application or offloading all Wifi networking functions. It is highly durable and is able to function consistently even in harsh industrial environments. If you’re not sure which one to choose, we recommend starting with the ESP32.

  1. The ESP8266, being more budget-friendly than the ESP32, serves well for straightforward DIY IoT projects despite having fewer features.
  2. ESP32-S3 series does also have touch sensing capability on 14 pins.
  3. The ESP8266 is better suited for situations where an application must use a microcontroller for historic reasons that require an Internet connection to help modernise it.
  4. Additionally, the ESP32 boasts robust security features, enhancing its overall device security.

ESP32 has Bluetooth support

esp32 vs esp8266 memory

The ESP8266 has been on the market for a long time and can get more support in software, which will be more convenient and compatible to use. However, the ESP8266 has some limitations in terms of GPIO mapping and does not have enough pins to operate. ESP32 has a larger memory capacity, which allows ESP32 to handle more complex applications and larger amounts of data. The ESP32 has more processing power than the ESP8266, which gives the ESP32 an advantage in handling complex tasks. The users who have used ESP32 have a common question about how does 400 KB SRAM compare against 520 KB SRAM of ESP32 as many of the times memory availability is a critical factor for embedded applications.

esp32 vs esp8266 memory

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What sets them apart is the built-in wireless networking capability, distinguishing them from other microcontrollers like the Arduino. This implies that, at a remarkably low cost, you can effortlessly manage and monitor devices remotely through Wi-Fi or Bluetooth (in the case of ESP32). Alternatively, if wireless capabilities are not needed, you can utilize the ESP32/ESP8266 for input and output control, similar to the Arduino. However, it’s crucial to note that while the Arduino operates on 5V logic, the ESP32 and ESP8266 operate at 3.3V.

esp32 vs esp8266 memory

It’s often used in more complex projects that require multiple sensors with multiple variables. The processing power also creates secure socket layer connections and great essential requirements in the world of IoT. ESP8266 and ESP32 are both popular choices for IoT projects, but there are some important differences to take into account when deciding which one to use. ESP8266 is a cheaper and less powerful option, with limited storage and processing capabilities. ESP32 is a more expensive and powerful option, with more RAM and ROM, as well as support for Bluetooth and WiFi.

The ESP8266 does not have a built-in CAN bus controller and thus cannot be used with a CAN bus. The ESP8266 does not have built-in SPI RAM and thus needs to use an external SPI RAM chip. The ESP32 also has 8 times more Flash memory (4 MB) than the ESP8266 (512 KB). The price of the ESP8266 breakout board is almost half of the ESP32.

In addition, because ESP8266 has been on the market for a long time, it can get more support in terms of software, making it more convenient and compatible to use. However, ESP8266 has some limitations in GPIO mapping, and there are not enough pins to operate. At this time, you can choose to use ESP32 or ESP8266 according to the project. The ESP32 is more powerful than the ESP8266, contains more GPIOs with multiple functions, faster Wi-Fi, and also supports Bluetooth.

In terms of cost, both are low-cost products, but the cost of ESP32 is slightly higher, and the cost of ESP32 is twice that of ESP8266. Since ESP8266 has been on the market for a long time, it can get more support in terms of software, making it more convenient and compatible to use. However, the ESP8266 has some limitations in terms of GPIO mapping and there aren’t enough pins to operate on. Currently, both boards can be programmed using the Arduino IDE programming environment. However they may not be compatible with the same libraries and commands, and some libraries are only compatible with one of the boards, so some modifications are required. Although it is missing a few functions, it is adequate for the vast majority of straightforward DIY IoT applications.