One of our most popular ESP8266 modules. It has a small form factor and it fits nicely into any enclosure.

It features two GPIO pins are broken out into the pins and can be used for the usual tasks.

To flash a firmware, all that is required is our USB CH340 - ESP01S adapter (simply fit it on top and ready) or some wiring and a serial-to-USB adapter.

An AT firmware will allow easy integration with Arduino. 

SPECIFICATIONS

• Model: ESP-01S
• ESP8266
• GPIO Pins: 2
  
• Antenna: PCB
• AT Firmware
  
• Wifi: 802.11 b/g/n
• 1MB  Flash
• Power down leakage current of < 10uA
• Standby power consumption of < 1.0mW (DTIM3)
• Note: The ESP-01S does not have a power LED