WiFi Serial TTL Module ESP-01S – ESP8266 Updated Version

Description:

comparing to ESP-01 (old version), ESP-01S (updated version) has these advantages:

The PCB layout has changed for an improvement in WiFi radio performance

1MB Flash Memory…upgraded from 512KB

Latest version esp-01s, with stronger signal

Feature

SDIO 2.0, SPI, UART

Four pins interface, VCC-3V3, GND, TXD and RXD. Two extra GPIOs can use.

AT commands firmware. New IC ESP8266ex

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

Integrated low power 32-bit CPU could 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

Integrated RF switch, balun, 24dBm PA, DCXO, and PMU

Integrated RISC processor, on-chip memory and external memory interfaces

Integrated MAC/baseband processors

Quality of Service management

I2S interface for high fidelity audio applications

On-chip low-dropout linear regulators for all internal supplies

Proprietary spurious-free clock generation architecture

Integrated WEP, TKIP, AES, and WAPI engines

Specification:

802.11 b/g/n

Wake up and transmit packets in < 2ms

Standby power consumption of < 1.0mW (DTIM3)