ESP-01S WiFi module

ESP-01S WiFi module

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The ESP-01S ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP-01S module comes pre-programmed with AT command set firmware. ESP-01S is an extremely cost effective module with a huge, and ever growing, community.


  • improved ESP-01 (better RF performance and larger memory (1MB))
  • 802.11 b/g/n
  • Wi-Fi Direct (P2P), soft-AP
  • Integrated TCP/IP protocol stack
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • Integrated PLLs, regulators, DCXO and power management units
  • +19.5dBm output power in 802.11b mode
  • Power down leakage current of <10uA
  • 1MB Flash Memory
  • Integrated low power 32-bit CPU, can be used as application processor
  • SDIO 1.1 / 2.0, SPI, UART
  • STBC, 1×1 MIMO, 2×1 MIMO
  • A-MPDU & A-MSDU aggregation & 0.4ms guard interval
  • Wake up and transmit packets in < 2ms
  • Standby power consumption of < 1.0mW (DTIM3)
  • 2x4 dual-row header
  • plug into solderless breadboard using our ADHDR08-F adapter


  1. This module is not capable of 5-to-3V logic-level shifting and will require an external Logic Level Converter. Do not power it directly from your 5V dev board!
  2. Note that this module is not FCC-approved.
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