DiGiYes 2Pcs ESP8266 ESP-01S WiFi Serial Transceiver Module 3.3V Wireless Module Compatible with Arduino

Features: - Supply Voltage: 3 - 3.6V - Supply Voltage: 3.3V (Typical Value) - Operating Temperature: -20 - +85 Degrees Celsius - Minimum 802.11b/g/n Wifi SOC module. - It uses a low power 32bit CPU and can double as an application processor. - The main frequency is up to 160MHz. - Built in 10bit high precision ADC. - Supports UART / GPIO / IC / PWM / ADC / HSPI interface. - Multiple dormancy modes are supported, with deep sleep current as low as 20uA. - Support AP / AP + STA / STA working mode. - Supports smart config / airKiss network configuration. - Serial port speeds up to 4Mbps. - Supports secondary development. - Supports serial port local upgrade and remote firmware upgrade. - Small size, about 11*10 mm, the size of fingernail. Easy to embed into any product. - Powerful, internally run LWIP protocol. - Improve the concise and efficient AT instructions, so that your development is easier. - Support AT instruction to set the high and low level of IO port. - Support AT instruction to read IO port level. - Support AT instruction to read ADC voltage. - Support AT instruction upgrade. - Support the function of AT setting the HOST NAME displayed on the computer. - The AT command can be executed in wireless network mode. Note: - It is not allowed to use 3.3V or 5V from USB to TTL for power supply. It is recommended to use 2 dry batteries or 3.3V after LDO conversion. It is strongly recommended for beginners to buy development board. Package Include: 2 x ESP-01S Wireless Module