EPI D02 – BK Wifi/BLE module

EPI D02 – BK Wifi/BLE module

Hardware model: Ezlo_EP02
Protocol: Wi-Fi and Bluetooth
Sample price:Free


The EPI E02 module features a fully integrated 2.4 GHz radio transceiver and baseband processor for Wi-Fi 802.11b/g/n and Bluetooth® v5.2 IoT applications. It can be used as a stand-alone application-specific communications processor or as a wireless data link in hosted MCU systems where power consumption is critical. It supports flexible memory architecture for storing profiles, stacks and custom application codes and can be updated using Over-The-Air (OTA) technology. The EPI E02 module uses the Beken BK7231N SoC. It is equipped with a powerful 32-bit processor with a clock speed of up to 120 MHz and internal flash memory of 2 MB. EPI E02 can be connected to any external MCU via interface, and to sensors or other devices via GPIO. The transceiver connects directly to the antenna and is fully compatible with Wi-Fi 802.11b/g/n and Bluetooth 5.2 BLE standards. With an integrated antenna switch, RF balun, power amplifier (PA), and low noise amplifier (LNA), the BK7231N enables both Wi-Fi and Bluetooth while minimizing PCB design footprint and external component requirements


  • Built in with the low-power 32-bit CPU, which can also function as an application processor
  • Working voltage: 3.0 to 3.6V
  • The clock rate: 120 MHz
  • Peripherals: 5 PWMs and 1 UART
  • Wi-Fi connectivity
  • – 802.11 b/g/n
  • – Support WEP, WPA/WPA2, WPA/WPA2 PSK
  • – (AES), WPA3 security modes
  • – Channels 1 to 14@2.4 GHz
  • – Up to +16 dBm output power in 802.11b mode
  • – Support STA/AP/STA+AP working mode
  • – Support SmartConfig and AP network configuration manners for Android and iOS devices
  • – Onboard PCB antenna
  • – Working temperature: -40°C to 85°C
  • Bluetooth connectivity
  • – Support the Bluetooth LE V5.2
  • – Support the transmit power of 6 dBm in the Bluetooth mode
  • – Complete Bluetooth coexistence interface
  • – Onboard PCB antenna with a gain of 0 dBi

Pin definition

1+3,3VPPower supply
2P6I/OHardware PWM and correspond to P6 of the IC
3GndPPower supply
4P7I/OHardware PWM and correspond to P7 of the IC
5RX1I/OUART_RX1 default, the MCU serialport should be in low-level or highimpedance state.
6P8I/OHardware PWM and correspond to P8 of the IC
7TXI/OUART_TX1 , the MCU serialport should be in low-level or high impedance state.
8ADCI/OADC, which corresponds to P23 of the IC
9P24I/OHardware PWM and correspond to P24 of the IC
10CENI/OReset pin
11P26I/OHardware PWM and correspond to P26 of the IC
T/PRX2I/OUART_RX2, This pin is not allowed to use
T/PTX2I/OUART_TX2, outputting logs

Wi-Fi RF Specification (RX)

Frequency Range24122484MHz
RX Sensitivity 11g @8% PER1 Mbps-97dBm
2 Mbps-93dBm
5.5 Mbps-91dBm
11 Mbps-89dBm
RX Sensitivity 11g @10% PER6 Mbps-92dBm
9 Mbps-90dBm
12 Mbps-88dBm
18 Mbps-86dBm
24 Mbps-82dBm
36 Mbps-79dBm
48 Mbps-77dBm
54 Mbps-75dBm
Receive Sensitivity (11n, 20MHz) @10% PERMCS=0-90dBm
Receive Sensitivity (11n, 40MHz) @10% PERMCS=0-88dBm
Maximum Receive Level802.11b-10dBm

3 Wi-Fi RF Specification (TX)

Frequency Range24122484MHz
Outout Power802.11b (11Mbps)17.0dBm
802.11g (54Mbps)15.0dBm
802.11n (MCS7)14.0dBm
Outout Power802.11b (11Mbps)-15-10dB
802.11g (54Mbps)-28-25dB
802.11n (MCS7)-30-28dB
VBAT=3.3V, Ambient temperature=25°C

Power Consumption

Continuous TX802.11b/11Mbps/17dB,280mA
Continuous TX802.11g/54Mbps/15dB,250mA
Continuous TX802.11n/HT20-MCS7/14dB,250mA
RX mode802.11b/11Mbps/-10dB input63mA
RX mode802.11g/54Mbps/-10dB input69mA
RX mode802.11n/HT20-MCS7/-10dB input69mA
Normal StandbyMCU stop; Modem power-off30uA
Low-power StandbyMCU stop in low-power mode10uA
Deep SleepAll main logic circuit power-off5uA
ShutdownCEN pin = LOW1uA

BLE RF Specification (RX)

Frequency Range24022480MHz
RX Sensitivity-85dBm
Maximum Input Level-10dBm

BLE RF Specification (TX)

Frequency Range24022480MHz
Maximum Output Power-20518dBm
20dB Bandwidth1MHz

Technical documentation


Design & Development

Application fields

Application Examples

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