GREE GRJWB04-J WiFi Module Owner’s Manual
- June 6, 2024
- Gree
Table of Contents
WiFi Module Manual
Model: GRJWB04-J
FCC ID：2ADAP-GRJWB04J
IC：12478A-GRJWB04J
Gree Electric Appliances, Inc. of Zhuhai
- Please read this manual carefully before operation and keep it well for future reference.
- Due to product improvement, Gree reserves the right to change the contents of this manual without prior notice.
- Gree Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.
General Functions
The wireless module complies with IEEE 802.11 b/g/n standard and it can achieve up to a speed of 65Mbps with a single stream in 802.11n , 54Mbps as specified in IEEE 802.11g, or 11Mbps for IEEE 802.11b to connect to the wireless LAN. This compact module is a total solution for a combination of Wi- Fi 802.11b/g/n technologies with Microcontroller Processor. The main control chip of this module is highly integrated with Bluetooth low-power controller, with a UART interface. It combines Bluetooth protocol, BLE baseband, MODEM, and BLE RF-IN chips. It also supports GATT-based applications and MESH device applications based on BLE users and supports Bluetooth 4.2 low power consumption. This compact module is a total solution for a combination of Wi- Fi 802.11b/g/n technologies with a Microcontroller Processor. The module is specifically developed for embedded system devices. Detailed Instruction of WiFi Module.
Technique Parameters
Table1. Module Parameters
| Categories | Feature | Parameters |
|---|---|---|
| Wireless specification | Operating Bands | FCC:2412 MHz to 2462 MHz for |
802.11b/g/n(HT20)
RED:2412MHz to 2472 MHz for 802.11b/g/n(HT20) 2402MHz to 2480 MHz for BLE
Protocol| IEEE 802.11 b/g/n
frequency modulation mode| CCK、OFDM、GFSK
Receive Sensitivity| 802.11b<-90.5dBm@11Mbps
802.11g<-77.5dBm@54Mbps
802.11n<-72dBm@MCS7
Data Rate| WIFI:
802.11b：1/2/5.5/11 Mbps
802.11g：6/9/12/18/24/36/48/54 Mbps
802.11n(HT20):6.5/13/19.5/26/39/52/58.5/65 Mbps
BLE rate: 1 Mbps
Antenna gain| 1.5 dBi
Impedance| 50-Ohm
electrical specification| Supply Voltage| +5V
Connect| Internal Antenna
Dimensions| 42.6mm×25mm±0.2mm
Operating Temperature| —| 0-50 deg C.
Circuit Description
The WIFI module has an independent power management system, and the system
provides a high quality power supply for the whole module. The Excellent
matching circuit in RF-Front ensures that the signal has minimal signal loss
and radiation. Oscillator Y1 provides the IC U1 with the required oscillation
frequency to enable the IC U1 to work normally. The IC U1 provides the
interfaces for a variety of peripherals (Timer, PWM, Interrupt, AD, the Debug)
from the module to the baseboard. Each peripheral that connects to the MCU I/O
pins can choose between two different I/O pin locations with the provided
flexibility in various applications.
Hereby, [ Gree Electric Appliances, Inc. of Zhuhai ], declares that this[ WiFi
Module ] is in compliance with the essential requirements and other relevant
provisions of RE Directive 2014/53/EU. A copy of the full DoC is attached.
Transmit frequency of EU:
WIFI: 2412-2472MHz
BLE: 2402-2480MHz
Maximum transmit power: <20dBm
Pin Definition
Table2. Pin Definition
| PIN | Name | Mode |
|---|---|---|
| 1 | VCC | +5V |
| 2 | TX | UART_TX |
| 3 | RX | UART_RX |
| 4 | GND | Ground |
Caution: The user is cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules and it contains license-
exempt transmitter(s)/receiver(s) that comply with Innovation, Science and
Economic Development Canada’s license-exempt RSS(s).
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:
— 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.
FCC& IC Radiation Exposure Statement:
This equipment complies with FCC and Canada radiation exposure limits set
forth for an uncontrolled environment. This equipment should be installed and
operated with a minimum distance of 20cm between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter.
Gree Electric Appliances, Inc. of Zhuhai
Adresse: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China, 519070
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