NoticePSF-A85
Contents
Overview
The PSF-A85 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.
PSF-A85 has completed self-contained wireless network, with built-in 32-bit kernel processor, on-chip SRAM, it can not only be used as the main control chip, but also as a WiFi adapter. To apply it to other microcontroller based designs, simply by using SPISDIO or I2CUART interface to communicate.
The module supports antenna of IPEX connector and stamp hole interface. It is widely applied to smart power grid, smart transportation, smart home, handheld devices, industrial control, etc.
Tutorial: Using ESP8266/ESP8285 to blink an LED
Go shopping PSF-A85 WiFi Wireless Module(SKU:IM160708001)
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
The main function of PSF-A85 includes serial transparent transmission, PWM control, GPIO control.
Serial transparent transmission good transmission performance, the maximum transmission rate is 460800bps.
PWM control adjust lighting, adjust led color, adjust motor speed and much more.
GPIO control control switches, relay and more.
Operating Mode
STA mode the module connected to Internet via a router, thus mobile phone or computer can remote control devices via Internet.
AP mode PSF-A85 module worked as a hotspot, which realizes directly communication between the module and phonecomputer, enables wireless LAN control.
STA+AP mode this is coexistence mode, which can realize seamlessly switch via the Internet control, easy to operate.
Applications
Serial to Wi-Fi;
Industrial transparent transmission DTU;
Wi-Fi remote monitoring/control;
Intelligent Toy;
Color LED control;
Firefighting and security integrated intelligence management;
Intelligent card terminals, wireless POS machines, Wi-Fi cameras, hand-held devices, etc.
Main Technical Specifications
| Module | Type | PSF-A85 |
|---|---|---|
| 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
PSF-A85 has many interfaces, supports UART, IIC, PWM, GPIO, ADC, etc., suitable for a variety of networking applications.
We can offer PSF-A85 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 |
WiFi Antenna
PSF-A85 supports two kinds of antenna interfaceIPEX 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 PSF-A85 stamp hole antenna interface.
Recommended Temperature Graph
Refer to IPCJEDEC standard; Peak Temperature 250°C; Number of Times ≤2 times;
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
For the convenience of using PSF-A85 module, now we offer PSF-A85 kicad, eagle package library. Also, we provide Eagle PCB antenna file. Please don't rub copper near the antenna.
