ESP-8285 Product Instructions Version V1.0 Copyright 2019 About this manual This manual specifically addresses the product characteristics, basic parameters, pin layout and definitions of the ESP-8285 module, RF finger, Each party such as mark, dimension diagram, peripheral circuit diagram and module placement shall talk about the parameters and use method of the module Clearly, contain the following sections. Chapters Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Title Contents Product Introduction Product Exhibition Electrical characteristics Pin Definition Function description Radio frequency index Dimension drawing Schematic diagram of peripheral design Module placement guide The characteristics and applications of ESP-8285 module are summarized Show actual product pictures and description of features List the basic parameters of the product Provides pin layout, definitions, and pin function descriptions Function description, WiFi configuration process and OTA upgrade Provide module radio frequency characteristic table The dimension diagram and package dimension diagram of the module are provided Provide peripheral circuit design reference circuit Provide instructions and diagrams for module placement Release Notes Date 2019.02.14 Title V1.0 Attention Release Notes Prepared by Audit First Release Wang Pengshuai Due to the upgrade of product version or other reasons, the contents of this manual may be changed. Henan Yuntuo Intelligent Technology Co., Ltd. Reserves the right to modify the contents of this manual without any notice or prompt. All representations, information and recommendations in this specification do not constitute any warranty, express or implied. ETOR_2019/02/14 1. Product Profile The ESP-8285 is an ultra-low power Wi-Fi module based on the Lexin ESP8285, ESP8285 incorporates industry-leading TensilicaL106 ultra-low power 32-bit miniature in smaller packages MCU. The module has the industry's most competitive package size and ultra-low power consumption technology, designed for mobile devices and the Internet of Things Application design that gives users' physical devices the ability to access WiFi networks for Internet or LAN connectivity And realize the networking function. The module can be operated independently for switching control of a single household appliance, Run on other master MCUs for slave devices. Smart devices developed using this module can be accessed locally by pressing the Key control, or remote control by connecting the ETOR Mini-Feather Universal APP. ESP-8285 is encapsulated by ceramic antennas and can be widely used in smart buildings, smart grids, smart transportation, smart homes, handheld devices, industrial control and other fields. ETOR_2019/02/14 2. Product display The ESP-8285 single channel switch module uses ceramic antennas. Figure 1. ESP-8285 Front view ETOR_2019/02/14 Product characteristics 3.3 VDC power supply, power supply current not less than 300mA;
Built-in TensilicaL106 ultra-low power 32-bit micro MCU, 80MHz and 160MHz main frequency support, support RTOS;
Supports wireless 802.11 b/g/n standards;
The contains a 10-bit high accuracy ADC. Supports the UART/GPIO/ADC/PWM/IIC interface;
Wi-Fi @ 2.4 GHz, supports WPA/WPA2 security mode;
+20.5 dBm output power in 802.11 b mode;
The maximum serial port speed is 4 Mbps Support local control;
Supports Wi-Fi remote control;
AP distribution network mode supporting Android and iOS systems;
Supports serial port local upgrades and remote firmware upgrades (OTA);
Applications: Smart Grid, Intelligent Transportation, Smart Home, Handheld Devices and Industrial Control. ETOR_2019/02/14 3. Electrical characteristics 3.1 Rated parameters Conditions: VDD=3. 3V 10%, GND=0 V; At room temperature. Module Hardware parameters Software parameters Type Model Main chip Hardware Interface Operating voltage GPIO drive capability Operating current Operating temperature Storage Environment Size Size Spectral range Antenna type Wireless network type Security mechanism Encryption Type Network protocol Firmware upgrade Table 1. Specification of Rating Parameters Parameters ESP-8285 ESP8285 UART, GPIO, PWM, ADC, IIC 3.0 V-3.6 V; Supply current > 300mA;
Typical 3.3 V Max: 12mA 80 mA average current Maximum operating current: 220mA Standby: < 200uA
-40 ~ 125 Temperature: < 40 , relative humidity: <
90% RH 13.5 mm 13.7 mm 1.9 mm 2412-2484 MHz Ceramic antenna STA/AP/TA + AP WEP/WPA-PSK/WPA2-PSK WEP64/WEP128/TKIP/AES IPv4, TCP/UDP/FTP/HTTP OTA Remote Upgrade ETOR_2019/02/14 3.2 WI-FI parameters Conditions: VDD=3. 3V 10%, GND=0 V; At room temperature. Wi-Fi parameters Type Wireless Standard Frequency Range Transmit power Reception sensitivity Table 2. Wi-Fi Parameter Description Parameters IEEE 802.11 b/g/n 2.4 GHz-2.5 GHz (2400M-2483.5 M) 802.11 b: +20 2 dBm @ 11Mbps 802.11 g: +17 2 dBm @ 54Mbps 802.11 n: +14 2 dBm (@ HT20, MCS7) 802.11 b:-91dBm (@ 11Mbps, CCK) 802.11 g:-75dBm (@ 54Mbps, OFDM) 802.11 n:-72dBm (MCS7) ETOR_2019/02/14 4. Pin Definitions The ESP-8285 module provides a single-channel switch control interface, a Wi-Fi LED interface, and a UART serial port. Figure 2. Module Pin Front Arrangement Figure 3. Module Pin Back Arrangement Figure Figure 4. Block Pinout Diagram ETOR_2019/02/14 Pin Name 1 2 3 4 5 6 7. 8 9 10. 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ANT ADC EN GPIO16 GPIO14 GPIO12 GPIO13 GPIO15 GPIO2 GPIO0 GPIO4 GND GPIO9 GPIO10 GPIO11 GPIO6 GPIO7 GPIO8 GPIO5 GND RX TX 3V3 RST Table 3. Pin Definitions and Function Descriptions Function Wi-Fi Antenna ADC interface, 0-1V input range Chip enable GPIO16 GPIO14 GPIO12: Relay switch, active high GPIO13: Wi-Fi status indicator lamp, connected to LED lamp series current limiting GPIO15 GPIO2: UART1_TX available for burn-write flash memory GPIO0 GPIO4 GND GPIO9 GPIO10 GPIO11 GPIO6 GPIO7 GPIO8 GPIO5 GND UART_RX for writing Flash UART_TX for writing Flash Power Supply External reset signal: active low ETOR_2019/02/14 5. Function description 5.1 Module Function Description The ESP-8285 module can be used as a single-channel switching device, either locally or remotely via APP. The following is a functional description:
1. Distribution network mode: AP configuration mode. Press the key (I00 pull-down, default high) for more than 5s to enter AP distribution network mode. 2. Switch: Under normal condition, click the key (IO0 pull-down more than 100ms) to turn on and off the control relay (IO12 output high/low level);
3. Power-Up Status: Relay power-up is off by default. 5.2 Basic workflow for Wi-Fi modules The device module is a "isolated island of information" when it is not connected to the LAN. The device-side operation, together with the APP setting of Weiyu Wanlian, enables the device to obtain the necessary information for joining the service network, including router SSID, Password, server IP, port number, and so on. Module built-in configuration:
the module is in AP mode, the mobile terminal as a station to join the AP to form a local area network to achieve data interaction. Press the configuration key 5S for a long time to enter the distribution network mode. Click Weiyu Wanlian APP Add Device (iOS mobile terminal needs to manually connect the SSID to which it needs to connect in the Settings menu, such as the hotspot of ETOR-GWM, Password: 11111111, which is not required for Android terminal), enter the SSID and Password of the home router, and complete the online preparation of the device. The device module goes through the following process from power-up to the connection server:
1. Join that configure router to connect to the Internet;
2, connecte that scheduling serv to obtain the information of the long-
connected cloud server;
3. Connecte to a long-connected cloud server;
4. Registration of equipment, bound to the Weiyu Wanlian account;
5. Obtain equipment application parameters and keep them online. Each of the above steps has a backoff policy and a reconnection mechanism when the connection/acquisition fails. Make sure the equipment is stable and real-time online. 5.3 OTA Upgrade The device connects to the upgrade server, remotely updates to the latest version of firmware, and realizes the online upgrade of the device. ETOR_2019/02/14 6. Radio frequency indicators Conditions: VDD=3. 3V 10%, GND=0 V; At room temperature. Table 4. Description of RF metrics Description Input Frequency Output Resistance Input reflection Output Power of PA at 72.2 Mbps Output Power for PA in 802.11 b Mode Sensitivity CCK1Mbps CCK11Mbps 6Mbps (1/2 BPSK) 54Mbps (3/464-QAM) HT20, MCS7 (65 Mbps, 72.2 Mbps) Adjacent frequency suppression OFDM, 6Mbps OFDM, 54Mbps HT20, MCS0 HT20, MCS7 Note:
Minimum Usually Maximum Unit 2412
-
-
15.5 19.5 2484
-
-10 17.5 21.5
-
39 +j6
-
16.5 20.5
-98
-91
-93
-75
-72 37 21 37 20 MHz A) The fact that DB DBm DBm DBm DBm DBm DBm DBm DB DB DB DB 1) 72.2 Mbps was measure in 802.11 n mode with MCS=7 and GI=200uS;
2) Output power up to +21.5 dBm in 802.11 b mode;
ETOR_2019/02/14 7. Dimension drawing Figure 4. Dimension Diagram ETOR_2019/02/14 8. Schematic diagram of peripheral design Figure 5. Peripheral Circuit Schematic The IO0/IO2/IO15/EN and RST pins of the module are internally pulled up and can be powered directly for operation. The mode of the module can be controlled by controlling the level of IO0/IO2/IO15, as shown in the following table:
GPIO15 GPIO0 GPIO2 1 0 0 X 0 1 X 1 1 Mode Uart Download Flash Boot ETOR_2019/02/14 9. Module placement guide The ESP-8285 module can be soldered to the PCB backplane. For optimum RF performance of the end product, please note that the placement of the module on the backplane is designed in a reasonable manner in accordance with this guide. The module uses 2.4 GWi-F The arrangement of the antenna outside the board frame or along the board edge and hollowed out below (at least 5.0 mm from both sides of the PCB antenna to both sides of the base plate) has little effect on the RF performance, which is comparable to the RF performance of the module tested separately. If the design is limited, the PCB antenna must be placed on the backplane. Place the antenna along the edge of the board and hollowed out or uncopper it. This way the RF performance will be somewhat impaired. If the antenna is placed in the backplane, the radio frequency signal can not be well radiated and received. For details of several common placement schemes of the module, please refer to the scheme diagram below. After rigorous RF analysis, the RF performance of various placement schemes in the scheme diagram is analyzed as follows:
1. The RF performance of scenarios 1, 2, and 3 is close. That is, the arrangement of the antenna outside the board frame, or the antenna along the board edge and hollowed out below (at least 5.0 mm from both sides of the PCB antenna to both sides of the base plate) has no significant impact on the RF performance, which is equivalent to the RF performance of the module tested separately. 2. If the design is limited and the PCB antenna must be placed on the backplane, refer to the arrangement in Scheme 4, where the antenna is placed along the edge of the board without copper underneath, which results in some loss of RF performance. Alternatively, the arrangement of scheme 5 may be adopted, and the antenna portion may be separated by an opening in the middle of the plate, but scheme 5 is not recommended if scheme 1-4 may be adopted. 3. Option 6 has the worst RF performance. Because the antenna is placed in the backplane, the radio frequency signal can not be radiated and received well. ETOR_2019/02/14 Guide diagram for placement of modules:
Scenario 1: Single module, no backplanScenario 2: Antenna outside the frame Scenario 3: The antenna is placed along the edge of the plate and hollowed out below the plate. Scenario 4: The antenna is placed along the edge of the plate and there is no copper under it Scheme 5: The antenna board frame is placed and hollowed out below Scheme 6: The antenna is in the board frame (there is no clearance below) Disclaimers and copyright notices The information in this document, including the URL address for reference, is subject to change without prior notice. The Documentation is provided "as is" without any warranty, including any warranty of merchantability, fitness for a particular purpose or non-infringing nature, and any warranty referred to elsewhere in any proposal, specification or sample. This document shall not be liable for any infringement of any patent rights arising out of the use of the information contained herein. This document does not hereby grant any license, express or implied, to use the Intellectual Property Rights by estoppel or otherwise. The Wi-Fi Alliance member logo is owned by the Wi-Fi Alliance. It is hereby declared that the ESP Trademark is the property of the respective owners of all trademarks, trademarks and registered trademarks mentioned in the registered trademarks of Lexin Company. Copyright 2018 Henan Yuntuo. All rights reserved. FCC Statement This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.