Espressif ESP01 Quick Start Manual page 3

1 . OVERVIEW
Categories Items
Module interface
On-chip sensor
On-board clock
Hardware
Operating voltage/Power supply
Operating current
Minimum current delivered by
power supply
Operating temperature range
Ambient temperature range
Package size
Wi-Fi mode
Wi-Fi Security
Encryption
Firmware upgrade
Software
Software development
Network protocols
User configuration
Specifications
SD card, UART, SPI, SDIO, I2C, LED PWM, Motor
PWM, I2S, IR
GPIO, capacitive touch sensor, ADC, DAC, LNA pre-
amplifier
Hall sensor, temperature sensor
40 MHz crystal
2.7 ~ 3.6V
Average: 80 mA
500 mA
-40°C ~ +85°C
Normal temperature
18±0.2 mm x 19.2±0.2 mm x 3.2±0.15 mm
Station/SoftAP/SoftAP+Station/P2P
WPA/WPA2/WPA2-Enterprise/WPS
AES/RSA/ECC/SHA
UART Download / OTA (download and write firmware
via network or host)
Supports Cloud Server Development / SDK for cus-
tom firmware development
IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT
AT instruction set, cloud server, Android/iOS app