Difference between revisions of "ITEAD8285"

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−
==Related terminologies==
+
==Related Terminologies==
 +
{| class="wikitable"
 +
! scope="col" | Abbreviation || scope="col" | Description
 +
|-
 +
| WiFi || Wireless Fidelity
 +
|-
 +
| UART || Universal Asynchronous Receiver & Transmitter
 +
|-
 +
| DTIM || Delivery Traffic Indication Message
 +
|-
 +
| SOC || System On a Chip
 +
|-
 +
| P2P || Point to Point
 +
|-
 +
| TCP || Transmission Control Protocol
 +
|-
 +
| IP || Internet Protocol
 +
|-
 +
| STBC || Space-Time Block Coding
 +
|-
 +
| MIMO || Multiple Input Multiple Output
 +
|-
 +
| MPDU || MAC Protocol Data Unit
 +
|-
 +
| MSDU || MAC Server Data Unit
 +
|-
 +
| IEEE || Institute Of Electrical And Electronics Engineers 
 +
|-
 +
| bps || Bits Per Second
 +
|-
 +
| CCK || Corporate Control Key
 +
|-
 +
| DQPSK || Differential Quadrature Phase Shift Keying
 +
|-
 +
| DBPSK || Differential Binary Phase Shift Keying
 +
|-
 +
| QAM || Quadrature Amplitude Modulation
 +
|-
 +
| OFDM || Orthogonal Frequency Division Multiplexing
 +
|-
 +
| WPA || Wi-Fi Protected Access
 +
|-
 +
| WPS || Wi-Fi Protected Setup
 +
|-
 +
| TKIP || Temporal Key Integrity Protocol
 +
|-
 +
| WAPI || Wlan Authentication And Privacy Infrastructure
 +
|-
 +
| WEP || Wired Equivalent Privacy
 +
|-
 +
| CRC || Cyclic Redundancy Check
 +
|}
 +
 
 
==Download==
 
==Download==

Revision as of 09:01, 7 July 2016

Overview

ITEAD8285.JPG

The ITEAD8285 is an ultra low-power Wi-Fi module designed by ITEAD. The module adopts the highly integrated Wi-Fi chip ESP8285. It features industry's highly competitive packaging size and ultra-low power technology. Specially designed for mobile devices and the Internet of Things application, it connects physical devices to Wi-Fi wireless network to make Internet or LAN communications.

ITEAD8285 has completed self-contained wireless network, with built-in 32-bit kernel processor, on-chip SRAM, it can be used as the main control chip, but also as a WiFi adapter. To apply it to other microcontroller-based designs, simply by using SPI/SDIO or I2C/UART interface communication.

The module supports IPEX connector and stamp hole interface. It can be widely apply for smart power grid, smart transportation, smart home, handheld devices, industrial control, etc.

Go shopping ITEAD8285 WiFi Wireless Module (SKU:)

Features

  • 802.11 b/g/n/d/e/i/k/r
  • Support STA/AP/STA+AP mode
  • WPA/WPA2 PSK and WP
  • Built-in TCP/IP protocol stack, support multi-way TCP Client connection
  • Support rich Socket AT commands
  • Support UART/GPIO data communication interface
  • Built-in 32 bit MCU, also work as application processor
  • 3.3V single supply
  • Wi-Fi Direct (P2P) support
  • Support MIMO 1×1 and 2×1, STBC, A- MPDU and A-MSDU aggregation and 0.4μs guard interval
  • WMM power save U-APSD
  • Multiple queue management to fully utilize traffic prioritization defined by 802.11e standard.
  • Adaptive rate fallback algorithm sets the optimum transmission rate and Tx power based on actual SNR and packet loss information.

Functions

Main functions

Operating Mode

Main functions

Applications

Main Technical Specifications

Module Type ITEAD8285
Chip ESP8285
Wi-Fi Wireless Standard IEEE 802.11b/g/n/d/e/i/k/r
Frequency Range 2.412GHz-2.484GHz
Tx Power 802.11b: +20 +/-2dBm (@11Mbps)
802.11g: +17 +/-2dBm (@54Mbps)
802.11n: +14 +/-2dBm (@HT20, MCS7)
Rx Sensitivity 802.11b: -91 dBm (@11Mbps ,CCK)
802.11g: -75 dBm (@54Mbps, OFDM)
802.11n: -72 dBm (MCS7)
Connector External：stamp hole interface
External：I-PEX connector
Hardware Peripheral Interface UART，IIC，PWM，GPIO，ADC
Operating Voltage 3.3V
GPIO Drive capability Max：12mA
Operating Current Continue sending=>Average value：~70mA, Peak value: 200mA

Normal mode=> Average value: ~12mA, Peak value: 200mA Standby：<200uA

Operating Temperature Range -40℃~125℃
Storage Temperature Range Temp.：<40℃, Relative humidity：<90%R.H.
Size 13.5mm*13.7mm*1mm；
Serial transparent transmission Transmission rate 110-921600bps
TCP Client 5
Software Wireless network types STA/AP/STA+AP
Security WEP/WPA-PSK/WPA2-PSK
Encryption WEP64/WEP128/TKIP/AES
Firmware Upgrade UART Download / OTA (via network)
Network Protocols IPv4, TCP/UDP/FTP/HTTP

Hardware

ITEAD8285 has many interfaces, supports UART, IIC, PWM, GPIO, ADC, etc., suitable for a variety of networking applications.

ITEAD8285 hardware.jpg

We can offer ITEAD8285 module PCB package, please contact customer service if you need;

Pin Definitions

ITEAD8285 pinmap.jpg

PIN Function Description
1 ANT WiFi Antenna
2 ADC ADC, input range: 0V-1V；
3 EN Chip enable terminal. Active high: chip works normally;

Active low: chip close, very small current.

4 GPIO16 GPIO16
5 GPIO14 GPIO14; HSPI_CLK
6 GPIO12 GPIO12; HSPI_MISO
7 GPIO13 GPIO13; HSPI_MOSI; UART0_CTS
8 GPIO15 GPIO15; HSPI_CS; UART0_RTS
9 GPIO2 Also used as a programming flash UART1_TX；GPIO2
10 GPIO0 GPIO0; SPI_CS2
11 GPIO4 GPIO4
12 GND GND
13 GPIO9 PIHD；HSPIHD；GPIO9
14 GPIO10 SPIWP；HSPIWP；GPIO10
15 GPIO11 SPI_CS0；GPIO11
16 GPIO6 SPI_CLK；GPIO6
17 GPIO7 SPI_MSIO；GPIO7
18 GPIO8 SPI_MOSI；GPIO8
19 GPIO5 GPIO5
20 GND GND
21 RX Also used as a programming flash UART Rx；GPIO3
22 TX Also used as a programming flash UART Tx ；GPIO1；SPI_CS1
23 3V3 Power supply
24 RESET External reset（low active）

Power Consumption

The following data are conducted at 25°temperature with 3.3V power supply.

1. All measurements were performed at the antenna interface.

2. All transmitted data are conducted based on a 90% duty cycle, continuous transmission mode.

Mode Typical Unit
Transmit 802.11b，CCK 1Mbps，Pout=+19.5dBm 215 mA
Transmit 802.11b，CCK 11Mbps，Pout=+18.5dBm 197 mA
Transmit 802.11g，OFDM54 Mbps，Pout=+16dBm 145 mA
Transmi t802.11n，MCS7，Pout=+14dBm 135 mA
Transmit 802.11b, 1024-byte packet length, -80dBm 100 mA
Transmit 802.11g, 1024-byte packet length, -70dBm 100 mA
Transmit 802.11n, 1024-byte packet length, -65dBm 102 mA
System Standby mode 70 mA
Power off 0.5 μA

Wi-Fi Radio Characteristics

The following data are from tests conducted at room temperature with 3.3V power supply.

Note：

1. 72.2Mbps is measured under 802.11n mode, MCS = 7, GI = 200uS;

2. Maximum output power can be + 19.5dBm in 802.11b mode;

Parameters Min Typical Max Unit
Input frequency 2412 - 2484 MHz
Input impedance - 50 Ω
Input reflection - - -10 dB
Output power of PA for 72.2 Mbp 14 15 16 dBm
Output power of PA for 802.11b 17.5 18.5 19.5 dBm
Sensitivity
CCK 1Mbps - -98 - dBm
CCK 11Mbps - -91 - dBm
6Mbps(1/2BPSK) - -93 - dBm
54Mbps(3/4 64-QAM) - -75 - dBm
HT20，MCS7（65Mbps，72.2Mbps） - -71 - dBm
Adjacent Channel Rejection
OFDM，6Mbps - 37 - dB
OFDM，54Mbps - 21 - dB
HT20，MCS0 - 37 - dB
HT20，MCS7 - 20 - dB

WiFi Antenna

ITEAD8285 supports two kinds of antenna interface:IPEX interfaces and stamp hole interface. You can directly use on-board PCB antenna and IPEX antenna, without adding any matching circuit. If you need to design antenna on a large board, you can use ITEAD8285 stamp hole antenna interface.

Recommended Temperature Graph

Refer to IPC/JEDEC standard; Peak Temperature: <250°C; Number of Times: ≤2 times;

ITEAD8285 Recommended reflux graph.jpg

Related Terminologies

Abbreviation Description
WiFi Wireless Fidelity
UART Universal Asynchronous Receiver & Transmitter
DTIM Delivery Traffic Indication Message
SOC System On a Chip
P2P Point to Point
TCP Transmission Control Protocol
IP Internet Protocol
STBC Space-Time Block Coding
MIMO Multiple Input Multiple Output
MPDU MAC Protocol Data Unit
MSDU MAC Server Data Unit
IEEE Institute Of Electrical And Electronics Engineers 
bps Bits Per Second
CCK Corporate Control Key
DQPSK Differential Quadrature Phase Shift Keying
DBPSK Differential Binary Phase Shift Keying
QAM Quadrature Amplitude Modulation
OFDM Orthogonal Frequency Division Multiplexing
WPA Wi-Fi Protected Access
WPS Wi-Fi Protected Setup
TKIP Temporal Key Integrity Protocol
WAPI Wlan Authentication And Privacy Infrastructure
WEP Wired Equivalent Privacy
CRC Cyclic Redundancy Check

Download

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