ESP-01S Serial WIFI Wireless Module ( ESP-01 Advanced Version) Description:Comparing to ESP-01, ESP-01S with stronger antenna singnal.Features:SDIO 2.0, SPI, UART;32-pin QFN package;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``lt'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/nWake up and transmit packets in ``lt' 2msStandby power consumption of ``lt' 1.0mW (DTIM3)20160730022236936.pdf10ua;