Gree GRJWB04-J User manual

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 contents of this manual without prior notice.
●Gree Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.

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1、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 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 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 Microcontroller Processor. The module
is specifically developed for embedded system devices. Detailed
Instruction of WiFi Module.

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2、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
physical Dimensions 42.6mm×25mm±0.2mm

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Operating
Temperature -- 0-50 deg C.
3、Circuit Description
Figure1. Circuit Diagram
WIFI module has an independent power management system, and
the system provides a high quality of 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, [ ],declares that this[
] is in compliance with the essential requirements and other
relevant provisions of RE Directive 2014/53/EU. A copy of the full DoC
Gree Electric Appliances,Inc.of Zhuhai WiFi
Module

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is attached.
Transmit frequency of EU:
WIFI: 2412-2472MHz
BLE: 2402-2480MHz
Maximum transmit power: <20dBm
4、Pin Definition
Figure2. Pin Definition
Table2. Pin Definition
PIN Name Mode
1 VCC +5V
2 TX UART_TX
3 RX UART_RX
4 GND Ground

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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
licence-exempt transmitter(s)/receiver(s) that comply with Innovation,
Science and Economic Development Canada’s licence-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.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables
aux appareils radio exempts de licence. L’exploitation est autorisée aux deux
conditions suivantes :
(1) l’appareil ne doit pas produire de brouillage, et
(2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi,
même si le brouillage est susceptible d’en compromettre le fonctionnement.
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

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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.
Déclaration d’IC sur l’exposition aux radiations:
Cet équipement est conforme aux limites d’exposition aux radiations définies
par le Canada pour des environnements non contrôlés. Cet équipement doit
être installé et utilisé à une distance minimum de 20 cm entre l’antenne et votre
corps.
Cet émetteur ne doit pas être installé au même endroit ni utilisé avec une autre
antenne ou un autre émetteur.

Gree Electric Appliances，Inc. of Zhuhai
Adresse:West Jinji Rd,Qianshan,Zhuhai,Guangdong,China, 519070