ESP32 NodeMCU now available for 8 € (including shipping)

The successor of the ESP8266, the ESP32 was launched in September 2016. It is based on a 32-bit dual-core SoC manufactured by TSMC at 40nm (which also manufactures the SoC of the iPhone). It is more powerful and more energy efficient than the ESP8266. It also adds Bluetooth connectivity to WiFi. The ESP32 also provides a larger number of GPIOs (32x), a cryptographic chip and an extended operating temperature range (-40 ° C to + 125 ° C). As soon as it was released, modules were quickly found for about €3 and development cards for about €20. This rate is too high and poorly positioned relative to the competition. Indeed, on the one hand, we find the ESP8266 for about €4. On the other side is the Raspberry Pi Zero for about 10 €. The Raspberry Pi Zero W that comes out also offers WiFi and Bluetooth for about 11 €. As its little brother, it is quite difficult to get it outside the kits (from €26).

NodeMCU ESP32S wroom

Today, things are starting to move. Chinese merchants have development cards based on the ESP-WROOM-32 module. At Banggood, we find the Geekcreit ESP32 card at €11,50 (promo €8,50). But it is mainly on Aliexpress that we currently find the best price. The FACE-TO-FACE Electronic store offers a NodeMCU stamped card for €8, including postage (€6,47 + €1,53). A GitHub repository has been opened here and offers several examples in Lua (camera OV7725, LCD Nokia5110, led …).

NodeMCU ESP-32S gpio dessous esp32

NodeMCU ESP-32 Development Card Specification (Full technical details available here):

  • SoC ESP-WROOM-32 – Espressive ESP32 – 240 MHz dual core TSMC Tensilica LX6 – 520 KB SRAM – 16 MByte flash
  • Connectivity
    • WiFi: 802.11 b / g / n
    • Bluetooth 4.0 LE (Low Energy)
  • GPIO: 2 x 19 pin
    • 3x UART
    • 3x SPI
    • 2x I2C
    • 12x ADC (analog inputs)
    • 2x DAC
    • PWM / timer input / output available on all GPIO pins
    • Compatible breadboard
  • USB: 1x micro USB port for power and programming
  • Integrated hardware cryptography supporting AES / SHA2 / Elliptical Curve Cryptography / RSA-4096
  • Power supply: 5V for USB or VIN pin
  • Dimensions: 51.4 x 28.3 mm

If Lua programming does not attract you, you can turn to this GitHub project developed by Espressif that supports the ESP32 on the Arduino IDE and PlatformIO.

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