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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<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.