Last Updated on : 2021-06-09 04:13:30download
WRD8P is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a highly integrated RF chip (RDA5981BM) and several peripheral components, with an embedded Wi-Fi network protocol stack and robust library functions.
WRD8P is embedded with a low-power Arm Cortex-M4 CPU, 2 MB flash memory, and 448 KB static
random-access memory (SRAM), and has extensive peripherals.
WRD8P is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP protocols. You can develop embedded Wi-Fi products as required.
No. | Date | Change Description | Version After Change |
---|---|---|---|
1 | 2019-8-20 | This is the first release. | 1.0.0 |
2 | 2019-09-16 | Update datasheet format | 2.0.1 |
WRD8P has one row of pins with the pin pitch being 1.27mm.
The WRD8P dimensions (W x L x H) are 16mm±0.35mmx24.8±0.35mm×3.5±0.15mm,the PCB thickness is 1.2±0.1 mm and pad spacing is 1.27mm.
Pin No. | Symbol | I/O Type | Function |
---|---|---|---|
1 | 3V3 | P | Power supply pin |
2 | GND | P | Power supply reference ground pin |
3 | GPIO23 | I/O | GPIO_23, a standard PWM pin, which is connected to GPIO23 (pin 33) on the internal IC |
4 | GPIO22 | I/O | GPIO_22, a standard PWM pin, which is connected to GPIO22 (pin 34) on the internal IC |
5 | GPIO24 | I/O | GPIO_24, a standard PWM pin, which is connected to GPIO24 (pin 32) on the internal IC |
6 | GPIO3 | I/O | GPIO_3, a standard PWM pin, which is connected to GPIO3 (pin 23) on the internal IC |
7 | GPIO25 | I/O | GPIO_25, a standard PWM pin, which is connected to GPIO25 (pin 31) on the internal IC |
8 | ADC | AI | ADC pin(1), which is connected to GPADC0 on the internal IC |
9 | TX | O | UART_TX, which is connected to GPIO26 (pin 24) on the internal IC |
10 | RX | I | UART_RX, which is connected to GPIO27 (pin 16) on the internal IC |
Note:
Pin No. | Symbol | I/O Type | Function |
---|---|---|---|
- | TEST | I/O | Used for the module production test |
Note: Test pins cannot be used.
Parameter | Description | Min | Max | Unit |
---|---|---|---|---|
Ts | Storage temperature | -40 | 125 | ℃ |
VBAT | Supply voltage | 3.3 | 4.2 | V |
Electrostatic discharge voltage (Human body model) | TAMB-25℃ | - | 2 | KV |
Electrostatic discharge voltage (Machine model) | TAMB-25℃ | - | 0.5 | KV |
Parameter | Description | Min | Typical | Max | Unit |
---|---|---|---|---|---|
Ta | Operating temperature | -40 | - | 105 | ℃ |
VBAT | Operating voltage | 3.0 | 3.3 | 3.6 | V |
VIL | IO low-level input | 0 | - | VCC*0.3 | V |
VIH | IO high-level input | VCC*0.75 | - | VCC | V |
VOL | IO low-level input | - | - | VCC*0.1 | V |
VoH | IO high-level input | VCC*0.8 | - | VCC | V |
Imax | IO drive current | - | - | 12 | mA |
Symbol | Mode | Rate | Transmit power / Receiving | Average | Typical | Unit |
---|---|---|---|---|---|---|
Tx | 11b | 11Mbps | +16dBm | 280 | 354 | mA |
Tx | 11g | 54Mbps | +13.5dBm | 250 | 300 | mA |
Tx | 11n | MCS7 | +12dBm | 190 | 290 | mA |
RX | 802.11b | 11 Mbit/s | Constant receiving | 80 | 100 | mA |
RX | 802.11g | 54 Mbit/s | Constant receiving | 80 | 100 | mA |
RX | 802.11n | MCS7 | Constant receiving | 80 | 100 | mA |
Working Mode | Working State,Ta=25℃ | Average | Max | Unit |
---|---|---|---|---|
Easy mode | Wi-Fi indicator flashes quickly. | 70 | 100 | mA |
Hotspot mode | Wi-Fi indicator flashes slowly. | 80 | 125 | mA |
Network connection | Wi-Fi indicator is always on. | 70 | 120 | mA |
Network disconnection | Wi-Fi indicator is always off. | 40 | 88 | mA |
Parameter | Description |
---|---|
Working frequency | 2.412~2.484GHz |
Wi-Fi standard | IEEE 802.11b/g/n(Channel 1-14) |
Rate of data transmission | 11b:1,2,5.5, 11 (Mbps) 11g:6,9,12,18,24,36,48,54(Mbps) 11n:HT20 MCS0~7 |
Type of antenna | PCB onboard antenna, gain 1 dBi |
Parameter | Min | Typical | Max | Unit | |
---|---|---|---|---|---|
Average output power of RF, 802.11b CCK Mode | 11M | - | 16 | - | dBm |
Average output power of RF,802.11g OFDM Mode | 54M | - | 13.5 | - | dBm |
Average output power of RF,802.11n OFDM Mode | MCS7 | - | 12 | - | dBm |
Frequency error | - | -20 | - | 20 | ppm |
Parameter | Min | Typical | Max | Unit | |
---|---|---|---|---|---|
PER<8%, RX Sensitivity, 802.11b CCK Mode | 11M | - | -84 | - | dBm |
PER<10%, RX Sensitivity, 802.11g OFDM Mode | 54M | - | -72 | - | dBm |
PER<10%, RX Sensitivity, 802.11n OFDM Mode | MCS7 | - | -69 | - | dBm |
WRD8P uses an onboard PCB antenna(default way).
To ensure optimal Wi-Fi performance when the Wi-Fi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts.
To prevent adverse impact on the antenna radiation performance, avoid copper or traces along the antenna area on the PCB. Ensure that there are no substrate media above or below the antenna and that copper is at a certain distance away from the antenna to maximize the antenna radiation performance.
The stamp-hole module must be mounted by the SMT machine. After being unpacked, it must be soldered within 24 hours. Otherwise, it must be put into the drying cupboard where the RH is not greater than 10%, or it needs to be packaged under vacuum again and the exposure time needs to be recorded (the total exposure time cannot exceed 168 hours).
Storage conditions for a delivered module are as follows:
The module needs to be baked in the following cases:
Baking settings:
Important: If this batch of modules is not baked within 168 hours, do not use the wave soldering to solder them. Because these modules are 3-level moisture-sensitive components, they are very likely to get damp when exposed outside. In this case, if they are soldered at high temperatures, it may result in component failure or poor soldering.
In the whole production process, take electrostatic discharge (ESD) protective measures.
To guarantee the passing rate, it is recommended that you use the SPI and AOI to monitor the quality of solder paste printing and mounting.
Perform mounting with the SMT based on the following reflow oven temperature curve. The highest temperature is 245°C. The reflow temperature curve is as below:
A: Temperature axis
B: Time axis
C: Liquidus temperature: 217 to 220°C
D: Ramp-up slope: 1 to 3°C/s
E: Duration of constant temperature: 60 to 120s; the range of constant temperature: 150 to 200°C
F: Duration above the liquidus: 50 to 70s
G: Peak temperature: 235 to 245°C
H: Ramp-down slope: 1 to 4°C/s
Note: The above curve is just an example of the solder paste SAC305. For more details about other solder pastes, please refer to Recommended oven temperature curve in the solder paste specifications.
Product number | MOQ (pcs) | Shipping packaging method | Modules per reel (pcs) | Packaging reels per box (reels) |
---|---|---|---|---|
WRD8P | 3600 | Carrier tape and reel packing | 900 | 4 |
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this device.
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 device has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if not installed and used following 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 device does cause harmful interference to radio or television reception, which can be determined by turning the device 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 device complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This device should be installed and operated with a minimum distance of 20cm between the radiator and your body.
Important Note
This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except following FCC multi-transmitter product procedures. Additional testing and device 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 with 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/warnings 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-WRD8P. The end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WRD8P”.
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna and users, and the transmitter module may not be co-located with any other transmitter or antenna.
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.
The device could be used with a separation distance of 20cm to the human body.
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