NoticeITEAD8285
Contents
Overview
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.
We can offer ITEAD8285 module PCB package, please contact customer service if you need;
Pin Definitions
| 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 |
