The module(ESP-01) can work with AT comma when used with Arduino, USB to TTL adaptor (FTDI USB module is recommended). The additional power supply might be needed to power up the board. With GCC toolchain and SDK availability opportunities with ESP8266 as an IOT device is endless. What is this ESP8266? It''s a wireless SOCIt has GPIO, I2C, ADC, SPI, PWM and some moreIt''s running at 80MHz64KBytes of instruction RAM96KBytes of data RAM64KBytes boot ROMIt has a Winbond W25Q40BVNIG SPI flashIt''s a RISC architectureThe core is a 106micro Diamond Standard core (LX3) made by TensilicaThe ESP8266 chip is made by EspressifModules bearing this chip are made by various manufacturersSpecification:802.11 b/g/n protocolWi-Fi 2.4 GHz, support WPA/WPA2Super small module size (11.5mm x 11.5mm)Integrated 10-bit ADCIntegrated TCP/IP protocol stack (ipv4 only at the moment)Integrated TR switch, balun, LNA, power amplifier and matching network Integrated PLL, regulators, and power management units 20dBm output power in 802.11b modeSupports antenna diversityDeep sleep power <10uA, Power down leakage current < 5uAIntegrated low power 32-bit MCUSDIO 2.0, SPI, UART, I2CSTBC, 1x1 MIMO, 2x1 MIMOA-MPDU & A-MSDU aggregation & 0.4μs guard intervalWake up and transmit packets in < 2msStandby power consumption of < 1.0mW (DTIM3)Operating temperature range -40C ~ 125C

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