Last Updated on : 2022-08-09 03:22:27download
WR2E is a low-power embedded WiFi module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8710BN) and an external flash chip, with an embedded WiFi network protocol stack and varied library functions.
With the maximum CPU clock rate of 125 MHz, WR2E also contains a low-power ARM CM4F, a WLAN MAC, a 1T1R WLAN module, 256-KB static random-access memory (SRAM), 2-MB ﬂash memory, and extensive peripherals.
WR2E is an RTOS platform that integrates all function libraries of the WiFi MAC and TCP/IP protocols. You can develop embedded WiFi products as required.
WR2E has two lines of pins with a 2-mm pin spacing.
The dimensions of WR2E are 15±0.35 mm (W)×18 ±0.35 mm (L) ×4.9±0.15 mm (H). (In the bottom view, the height of the device is 1.5 mm). The dimensions of WR2E are as follows:
Definitions on interface pins are shown as below:
|1||VD33||P||Power supply pin (3.3V)|
|2||GPIOA_12||I/O||GPIOA_12, a universal GPIO, hardware PWM, IC Pin 17|
|3||GND||P||Power supply reference ground|
|4||GPIOA_19||I/O||GPIOA_19, a universal GPIO, IC Pin 30|
|5||GPIOA_18||I/O||UART0_RXD (user-side serial interface)|
|6||GPIOA_5||I/O||GPIOA_5, a universal GPIO, hardware PWM, IC Pin 28|
|7||GPIOA_23||I/O||UART0_TXD (user-side serial interface)|
|8||ADC||AI||ADC port, the maximum input voltage is 5V|
|9||GPIOA_14||I/O||GPIOA_14, a universal GPIO, hardware PWM, C Pin13|
|10||CHIP_EN||I/O||When software disables the function, connection by a user fails|
|11||GPIOA_15||I/O||GPIOA_15, a universal GPIO, hardware PWM, IC Pin 14|
Note: P indicates power supply pins, I/O indicates input/output pins, and AI indicates analog input pins.
|Parameter||Description||Minimum value||Maximum value||Unit|
|ESD voltage (human body model)||TAMB-25℃||-||2||KV|
|ESD voltage (machine model)||TAMB-25℃||-||0.5||KV|
|Parameter||Description||Minimum value||Typical value||Maximum value||Unit|
|VIL||IO low-level input||-0.3||-||VDD*0.25||V|
|VIH||IO high-level input||VDD*0.75||-||3.6||V|
|VOL||IO low-level output||-||-||VDD*0.1||V|
|VOH||IO high-level output||VDD*0.8||-||VDD||V|
|Imax||IO drive current||-||-||16||mA|
|Cpad||Input pin capacitance||-||2||-||pF|
TX power consumption:
|Working status||Mode||Rate||Transmit power/Receive||Average value||Peak value (Typical value)||Unit|
|Transmit||11 b||11 Mbps||+17 dBm||287||367||mA|
|Transmit||11 b||11 Mbps||+18 dBm||295||382||mA|
|Transmit||11 g||54 Mbps||+15 dBm||255||406||mA|
|Transmit||11 g||54 Mbps||+17.5 dBm||267||428||mA|
|Transmit||11n-HT20||MCS 7||13 dBm||244||395||mA|
|Transmit||11n-HT20||MCS 7||16.5 dBm||257||422||mA|
|Transmit||11n-HT40||MCS 7||13 dBm||220||393||mA|
|Transmit||11n-HT40||MCS 7||16.5 dBm||230||420||mA|
RX power consumption:
WR2E operating current
|Working mode||Working status, Ta = 25°C||Average value||Peak value (Typical value)||Unit|
|Quick connection network state||The module is in the fast network connection state and the WiFi indicator always flashes||115||376||mA|
|Hotspot network configuration state||The module is in the hotspot network configuration state and the WiFi indicator always flashes slowly||60||386||mA|
|Network connection operation state||The module is connected to the network and the WiFi indicator is always on||105||389||mA|
|Disconnected state||The module is disconnected and the WiFi indicator is dark||45||381||mA|
|Frequency range||2.400 to 2.4835 GHz|
|WiFi standard||IEEE 802.11b/g/n (channels 1 to 14)|
|Data transmission rate||11b: 1, 2, 5.5, 11 (Mbps)|
|Data transmission rate||11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps)|
|Data transmission rate||11n: HT20 MCS 0 to 7|
|Data transmission rate||11n: HT40 MCS 0 to 7|
|Antenna type||Onboard PCB antenna with a gain of 2.5 dBi|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|Average RF output power, 802.11b CCK Mode 1 M||-||17.5||-||dBm|
|Average RF output power, 802.11g OFDM Mode 54 M||-||14.5||-||dBm|
|Average RF output power, 802.11n OFDM Mode MCS 7||-||13.5||-||dBm|
|EVM@802.11b CCK 11 Mbps Mode 17.5 dBm||-||-10||dB|
|EVM@802.11g OFDM 54 Mbps Mode 15.0 dBm||-||-29||dB|
|EVM@802.11n OFDM MCS7 Mode 14.0 dBm||-||-30||dB|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|PER<8%, RX sensitivity, 802.11b CCK Mode 1 M||-||-91||-||dBm|
|PER<10%, RX sensitivity, 802.11g OFDM Mode 54M||-||-75||-||dBm|
|PER<10%, RX sensitivity, 802.11n OFDM Mode MCS7||-||-72||-||dBm|
WR2E uses only an onboard PCB antenna with a gain of 2.5 dBi.
To ensure optimal WiFi performance when the WiFi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts.
The mechanical dimensions of the PCB of WR2E are 15±0.35 mm (W)×18±0.35 mm (L) ×0.8±0.1 mm (H).
The following figure shows the mechanical dimensions of WR2E.
Note: The default dimensional tolerance is ±0.35 mm. If you have specific requirements on dimensions, make them clear in the datasheet after communication.
The following figure is a schematic diagram of WR2E which shows where pins are.
WR2E PCB footprint is shown as below:
Set oven temperatures according to the following temperature curve of wave soldering. The peak temperature is 260°C±5°C.
Recommended soldering temperature:
|Suggestions on oven temperature curve of wave soldering||Suggestions on manual soldering temperature|
|Preheat temperature||80 to 130 °C||Soldering temperature||360±20°C|
|Preheat time||75 to 100s||Soldering time||＜3s/point|
|Peak contact time||3 to 5s||NA||NA|
|Temperature of tin cylinder||260±5°C||NA||NA|
Storage conditions for a delivered module:
The moisture-proof bag is placed in an environment where the temperature is below 40°C and the relative humidity is lower than 90%.
The shelf life of a dry-packaged product is 12 months from the date when the product is packaged and sealed.
There is a humidity indicator card (HIC) in the packaging bag.
|Product model||MOQ (pcs)||Shipping packaging method||Modules per reel||Reels per carton|
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
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.
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:
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body.
This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except in accordance with FCC multi-transmitter product procedures. Additional testing and equipment authorization may be required to operate simultaneously with other radios.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end-user.
The host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
The end-user manual shall include all required regulatory information/warning as shown in this manual, including: This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body.
This device has got an FCC ID: 2ANDL-WR2E. The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WR2E”
This device is intended only for OEM integrators under the following conditions:
As long as the 2 conditions above are met, further transmitter tests will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
Declaration of Conformity European notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EU, 2011/65/EU. A copy of the Declaration of conformity can be found at https://www.tuya.com.
This product must not be disposed of as normal household waste, in accordance with the EU directive for waste electrical and electronic equipment (WEEE-2012/19/EU). Instead, it should be disposed of by returning it to the point of sale, or to a municipal recycling collection point.
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