Freetronics Introduces an Arduino Shield for ESP8266 ESP-01 Wi-Fi Module

ESP8622 has drastically brought down the price of adding Wi-Fi to MCU boards such as Arduino UNO,  but you need to add some cables, and take care of 3.3V to 5V conversion for the UART pins either with a divider made of 2 resistors, or a FET level shifter, and you may not be able to access all I/O of ESP8622 on the popular ESP-01 version of the module. For a neater solution, Freetronics had designed ESP-01 WiFi Module Shield that takes care of all these small issues.

Key features of the shield:

  • 3.3V regulator dedicated to the module
  • Logic level shifters on TX/RX lines: compatible with both 3.3V and 5V Arduino models
  • Selectable TX/RX pins: use D0/D1 for hardware serial, or D2 – D7 for software serial
  • CH_PD pin on ESP-01 module pre-biased for correct operation mode
  • Extra ESP-01 pins broken out for your own connections
  • Prototyping area with 5V and GND rails
  • All Arduino headers broken out for easy connections
  • Stacking R3-style Arduino headers including the ICSP header
Arduino + Shield + ESP-01 Module

Eagle schematics and PCB layout are available on github under TAPR Open Hardware License.

The company sells the shield (without ESP8622 ESP-01) for $10.94 US (SKU: ESP1SH).

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