ACROBOTIC ESP8285/PSF-A85 ESP8266 Serial to Wi-Fi Module (1MB Flash)

Regular price $5.95

The ESP8285 is the latest Serial-to-WiFi adapter created by Espressif. Following its incredibly popular predecessor (the tiny ESP8266), the ESP8285 is released with added functionality, and most importantly, including built-in Flash Memory (1MB) aiming at minimizing the footprint and the necessity of peripheral components (e.g., SPI flash memory ICs) such as those inside the ESP-12E modules.

The tiny-sized ESP8285 System On a Chip (SoC) includes a powerful microcontroller with a full WiFi front-end (both as client and access point) as well as a full TCP/IP stack with DNS.

The PSF-A85 module in this listing makes it easy to work with the incredibly tiny ESP8285 SoC, giving access to all of the chip's pins via easy-to-solder castellated connections. The PSF-A85 module breaks out all the usable GPIO of the ESP8285, and it carries 1MB of built-in flash storage as well as a few necessary components for the onboard ESP8285 to operate properly. It also includes an onboard antenna as well as IPEX and stamp connectors for external ones.


  • 17 GPIO (save for D0, every GPIO can be PWM, I2C (software), 1-wire)
  • Wi-Fi module containing the ESP8285 IC
  • Onboard u.FL (IPEX) connector
  • Integrated TCP/IP stack
  • 24 castellated-pin 2mm-pitch configuration 


  • Supported protocols: 802.11 b/g/n
  • Serial/UART baud rate: 115200bps
  • Input voltage: 3.3V
  • Max I/O voltage: 3.6V
  • Regular operation current draw: ~70mA
  • Current draw (peak): ~300mA
  • Power-down leakage current: <10µA
  • Output power: +19.5dBm (802.11b)
  • Flash Memory Size: 1MB (8Mbit)
  • WiFi security modes: WPA, WPA2
  • Module's dimensions: 24.75mm x 14.5mm (0.974" x 0.571")