1. Overview
1. Overview
1.1 Module Overview
EK057 is a powerful, generic Wi-Fi+Bluetooth
®
+Bluetooth
®
LE MCU module that targets a wide variety of appli-
cations, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music
streaming and MP3 decoding.
Table 1: EK057 Specifications
Categories Items Specifications
Wi-Fi
Protocols
802.11 b/g/n (802.11n up to 150 Mbps)
A-MPDU and A-MSDU aggregation and 0.4 µs guard
interval support
Frequency range 2412 ~ 2484 MHz
Bluetooth
®
Protocols
Protocols v4.2 BR/EDR and Bluetooth
®
LE specifica-
tions
Radio
Class-1, class-2 and class-3 transmitter
AFH
Audio CVSD and SBC
Hardware
Module interfaces UART, SPI, I2C, I2S, GPIO, ADC
Integrated crystal 40 MHz crystal
Integrated SPI flash 8 MB
Operating voltage/Power supply 3.0 V ~ 3.6 V
Operating current Average: 80 mA
Minimum current delivered by power
supply
500 mA
Recommended operating tempera-
ture range
–40 °C ~ +85 °C
Moisture sensitivity level (MSL) Level 3
1.2 Pin Description
The module has 14 pins and 7 testing points. See pin definitions in Table 2.
Table 2: Pin Definitions
Name
No. Type
Function
IO32
A1 I/O
GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4,
TOUCH9, RTC_GPIO9
IO16
A2 I/O
GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
IO17
A3 I/O
GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
IO5
A4 I/O
GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
3V3
A5 P
Power supply
GND
A6 P
Ground
Espressif Systems 1 EK057 User Manual V0.2
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