Megalin ML-E32/GZ-E32 WiFi Module User Manual

Megalin ML-E32/GZ-E32 WiFi Module

Overview

Introduction
ML-E32 is a wireless serial port module (UART) based on SEMTECH’s SX1278 RF chip. It has multiple transmission modes, working in the 410MHz-441MHz, SX1278, which will bring longer communication distance, and has the advantages of concentrated power density, meanwhile it has a very strong confidentiality. the modules of transmitting power adopt industrial grade crystal oscillators to ensure the stability and consistency, its precision is lower than the widely adopted 10ppm. ML-E32 is in stable bulk production and are widely applied in utility meters, IoT renovation, smart home, etc. The modules feature data encryption and compression. The data transmitted over the air features randomness. The encryption-decryption algorithm makes data interception meaningless. Data compression enables shorter transmitting time and lower rate of being interfered, which increases the reliability and transmitting efficiency.

Features

• Support the global license-free 410-441 MHz band；
• Support air date rate of 0.3kbps-19.2kbps；
• Low power consumption for battery supplied applications；
• Support 3.3V-5.5V power supply, power supply over 5.0 V can guarantee the best performance；
• Industrial grade standard design, support -40-85 °C for working over a long time；

Specification and parameter

Limit parameter

module
Blocking power（dBm）| –| -10| Chances of burn is slim when modules are used in short distance
Operating temperature（℃）| -40| 85| –

Operating parameter

Main parameter| Performance|

Remark

---|---|---
Min| Typ.| Max.
Operating voltage（V）| 3.3| 5.0| 5.2| ≥5.0 V ensures output power
Communication level（V）|

–

|

3.3

|

–

| For 5V TTL, it may be at risk of

burning down

Operating temperature（℃）|

-40

|

–

|

85

| Industrial design
Operating frequency（MHz）| 410| –| 525| Support ISM band
Power consumptio n|

Transmitting current [mA]

|

–

|

106

| Instant power

consumption

|

Instant power consumption

Receiving current [mA]| –| 15| –| –
Turn-off current [μA]| –| 4| –| Software is shut down
Receiving sensitivity（dBm）| -144| -146| -147| Air data rate is 2.4kbps
Air data rate（bps）| 0.3k| 2.4k| 19.2k| Controlled via user’s programming
Main parameter| Description| Remark
---|---|---
TX length| 58 Byte| Maximum capacity of single package
Buffer| 512 Byte| –
Communication interface| TTL| @3.3V
Package| DIP| –
Connector| 2.54mm| –
Size| 21 * 36mm| –
Antenna| SMA-k| 50 ohm impedance

Size and pin definition

1

| ****

M0

| Input

（weak pull-up）

| ****

Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded).

2

| ****

M1

| Input

（weak pull-up）

| ****

Work with M0 to decide 4 working modes of module (not suspended, if not used, could be grounded).

3

| ****

RXD

| ****

Input

| TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be

configured as open-drain or pull-up input.

4

| ****

TXD

| ****

Output

| TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be

configured as open-drain or push-pull output

5

| ****

AUX

| ****

Output

| To indicate module ‘s working status & wakes up the external MCU.

During the procedure of self-check initialization, the pin outputs low level. Can be configured as push-pull output (suspending is allowed).

6| VCC| Input| Power supply ：2.3-5.2V DC
7| GND| Input| Ground
8| Fixed orifice| –| Fixed orifice
9| Fixed orifice| –| Fixed orifice
10| Fixed orifice| –| Fixed orifice

Connect to MCU

2

| ****

For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.

Function description

Fixed transmission

Broadcasting transmission

Broadcasting address

• For example: Set the address of module A as 0xFFFF, and the channel as 0x04;
• When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the purpose of broadcast is realized.

Monitor address

• For example: Set the address of module A as 0xFFFF, and the channel as 0x04;
• When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of monitor is realized.

Reset

When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating mode based on user’s parameters. During the process, the AUX remains low level. After the process completed, the AUX outputs high level and starts to work as per the operating mode combined by M1 and M0. Therefore, users need to wait the AUX rising edge as the start of module’s normal work.

AUX description

• AUX Pin can be used as indication for wireless send & receive buffer and self-check.
• It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been sent through UART, or whether the module is still in the process of self-check initialization.

Indication of UART output

To wake up external MCU

Indication of wireless transmitting

• Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub-packaging).
• When AUX=1, the user can input data less than 512 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal 512 bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at this circumstance, it may cause overtime when the module is waiting for the user data, or transmitting wireless sub package.
• When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the last packet of data is still in transmission.

Configuration procedure of module

• Only happened when power-on resetting or exiting sleep mode

Notes for AUX

1

| For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if

it meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs high level.

2

| When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since

AUX outputs high level, the mode switch will be completed.

3

| After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms . If

AUX stays on the high level, the operating mode switch can be affected immediately.

4

| When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will

reset user parameters, during which AUX outputs low level.

Operating mode

There are four operating modes, which are set by M1 and M0, the details are as follows:

transmission is on

| The receiver must work in mode 0 or mode 1
1Wake up| 1| 0| UART and wireless channel are open, the only difference with mode 0 is that before transmitting data, increasing the wake up code automatically, so

that it can awake the receiver under mode 3.

| The receiver could be 0,1 or 2
2 Power saving| 0| 1| UART close, wireless is under air-awaken mode, after receiving data, UART open and send data.| transmitter must be mode 1, unable to transmit in this mode.
3Sleep| 1| 1| sleep mode, receiving parameter setting command is available.| more     details    on     parameter specification.

Mode switch

• The user can decide the operating mode by the combination of M1 and M0. The two GPIO of MCU can be used to switch mode. After modifying M1 or M0, it will start to work in new mode 1ms later if the module is free. If there are any serial data that are yet to finish wireless transmitting, it will start to work in new mode after the UART transmitting finished. After the module receives the wireless data & transmits the data through serial port, it will start to work in new mode after the transmitting finished. Therefore, the mode-switch is only valid when AUX outputs 1, otherwise it will delay.
• For example, in mode 0 or mode 1, if the user inputs massive data consecutively and switches operating mode at the same time, the mode-switch operation is invalid. New mode checking can only be started after all the user’s data process completed. It is recommended to check AUX pin out status and wait 2ms after AUX outputs high level before switching the mode.
• If the module switches from other modes to stand-by mode, it will work in stand-by mode only after all the remained data process completed. The feature can be used to save power consumption. For example, when the transmitter works in mode 0, after the external MCU transmits data “12345”, it can switch to sleep mode immediately without waiting the rising edge of the AUX pin, also the user’s main MCU will go dormancy immediately. Then the module will transmit all the data through wireless transmission & go dormancy 1ms later automatically, which reduces MCU working time & save power.
• Likewise, this feature can be used in any mode-switch. The module will start to work in new mode within 1ms after completing present mode task, which enables the user to omit the procedure of AUX inquiry and switch mode swiftly. For example, when switching from transmitting mode to receiving mode, the user MCU can go dormancy before mode-switch, using external interrupt function to get AUX change so that the mode-switch can be realized.
• This operation is very flexible and efficient. It is totally designed on the basis of the user MCU’s convenience, at the same time the work load and power consumption of the whole system have been reduced and the efficiency of whole system is largely improved.

Normal mode (mode 0)

| When M1 = 0 & M0 = 0, module works in mode 0
---|---

Transmitting

|

The module can receive the user data via serial port, and transmit wireless data package of 58 bytes. When the data inputted by user is up to 58 byte, the module will start wireless transmission. During which the user can input data continuously for transmission.

When the required transmission bytes are less than 58 bytes, the module will wait 3-byte time and treat it as data termination unless continuous data inputted by user. Then the module will transmit all the data through wireless channel.

When the module receives the first data packet from user, the AUX outputs low level.

After all the data are transmitted into RF chip and transmission start , AUX outputs high level.

At this time, it means that the last wireless data package transmission is started, which enables the user to input another 512 bytes continuously. The data package transmitted from the module working in mode 0 can only be received by the module working in mode 0 or 1.

Receiving

|

The wireless receiving function of the module is on, the data packet transmitted from the module working in mode 0 & mode 1 can be received.

After the data packet is received, the AUX outputs low level, 5ms later the module starts to transmit wireless data through serial port TXD pin.

After all the wireless data have been transmitted via serial port, the AUX outputs high level.

Wake-up mode (mode 1)

|

When M1 = 0 & M0 = 1, module works in mode 1

---|---

Transmitting

| The condition of data packet transmission & AUX function is the same as mode 0. The only difference is that the module will add preamble code before each data packet automatically. The preamble code length depends on the wake-up time set in the user parameters. The purpose of the preamble code is waking up the receiving module works in mode 2. Therefore, the data package transmitted from mode 1 can be received by mode 0,

mode1 and mode 2.

Receiving| The same as that in mode 0.

Power-saving mode (mode 2)

| When M1 = 1 & M0 = 0, module works in mode 2
---|---

Transmitting

| UART is closed, the module cannot receive any serial port data from outside MCU.

Hence the function of wireless transmission is not available for the module working in this mode.

Receiving

|

In mode 2, it is required the data transmitter works in mode 1. The wireless module monitors the preamble code at regular time.

Once it gets the preamble code, it will remain as receiving status and waiting for the completion of receiving the entire valid data package.

Then the AUX outputs low level, 5ms later the serial port is open to transmit received wireless data through TXD. Finally, AUX outputs high level after process completed.

The wireless module stays in “power-saving – monitoring” working status (polling).

By setting different wake-up time, the module will have different receiving response delay (2s in maximum) and average power consumption (30uA in minimum).

The user needs to achieve a balance between communication delay time & average power consumption.

Sleep mode (mode 3)

| When M1=1, M0=1, module works in mode 3
---|---
Transmitting| N/A
Receiving| N/A
Parameter

setting

| This mode can be used for parameter setting. It uses serial port 9600 & 8N1 to set module working parameters

through specific instruction format. (pls refer to parameters setting for details)

Notes

| When the mode changes from stand-by mode to others, the module will reset its parameters, during which the AUX keeps low level and then outputs high level after reset completed. It is recommended to check the AUX

rising edge for user.

Command format

In sleep mode（Mode 3：M1=1, M0=1）, it supports below instructions on list. (Only support 9600 and 8N1 format when setting)

No.| Instruction

format

| Illustration
---|---|---
1| C0+working parameters| C0 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and must

be sent in succession, (Save the parameters when power-down ).

2| C1+C1+C1| ( Save the parameters when power-down )
3| C2+working parameters| Three C1 are sent in hexadecimal format. The module returns the saved parameters and

must be sent in succession.

4| C3+C3+C3| C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and must

be sent in succession. ( Do not save the parameters when power-down )

5| C4+C4+C4| Three C3 are sent in hexadecimal format. The module returns the version information and

they must be sent in succession.

Default parameters

| Default parameter values：：C0 00 00 1A 17 44
---|---
Model| Frequency| Address| Channel| Air data rate| Baud rate| Parity|
ML-E32| 433MHz| 0x0000| 0x17| 2.4kbps| 9600| 8N1|

Reading operating parameters

C1+C1+C1

| In sleep mode（M0=1，M1=1），

User gives the module instruction (HEX format): C1 C1 C1, Module returns the present configuration parameters.

For example, C2 00 00 1A 17 44.

Reading version number

C3+C3+C3

| In sleep mode（M0=1，M1=1）,

User gives the module instruction (HEX format): C3 C3 C3,

Module returns its present version number, for example C3 32 xx yy.

32 here means the module model (E32 series); xx is the version number and yy refers to the other module features.

Reset command

C4+C4+C4

| In sleep mode（M0=1，M1=1）,

User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time. During the reset process, the module will conduct self-check, AUX outputs low level. After reset completing, the AUX outputs high level, then the module starts to work regularly which the working mode can be switched or be given another instruction.

Parameter setting command

0

|

HEAD

|

Fix 0xC0 or 0xC2, it means this frame data is control command

| l   Must be 0xC0 or 0xC2 C0: Save the parameters when power-down

C2: Do not save the parameters when

power-down

1

|

ADDH

|

High address byte of module （the default 00H）

|

00H-FFH

2

|

ADDL

|

Low address byte of module （the default 00H）

|

00H-FFH

3

|

SPED

| 7| 6| UART parity bit|

l  UART mode can be different between communication parties

0| 0| 8N1 (default)
0| 1| 8O1
1| 0| 8 E1
1| 1| 8N1 (equal to 00)
5| 4| 3| TTL UART baud rate（bps）|

l  UART baud rate can be different between communication parties

l  The UART baud rate has nothing to do with wireless transmission parameters & won’t affect the wireless transmit / receive features.

0| 0| 0| 1200
0| 0| 1| 2400
0| 1| 0| 4800
0| 1| 1| 9600 (default)
1| 0| 0| 19200
1| 0| 1| 38400
1| 1| 0| 57600
1| 1| 1| 115200
2| 1| 0| Air data rate（bps）| l  The lower the air data rate, the longer

the     transmitting    distance,    better

0| 0| 0| 0.3k
| | 0| 0| 1| 1.2k| anti-interference    performance and longer transmitting time

l  The air data rate must keep the same for both communication parties.

---|---|---|---|---|---|---
0| 1| 0| 2.4k (default)
0| 1| 1| 4.8k
1| 0| 0| 9.6k
1| 0| 1| 19.2k
1| 1| 0| 19.2k (same to 101)
1| 1| 1| 19.2k (same to 101)
| | General Specifications| Except for ML-E32 (400T20S)

4

|

CHAN

| 7| 6| 5| reserved| Write 0
Communication channel| 00H-1FH, correspond to 410~441MHz
4-0, channel (410M + CHAN*1M), default 17H（433MHz）

5

|

OPTION

| 7| Fixed transmission enabling bit（similar to MODBUS）| l  In fixed transmission mode, the first three bytes of each user’s data frame can be used as high/low address and channel. The module changes its address and channel when transmit. And it will revert to original setting after complete the process.
0| Transparent transmission mode

1

|

Fixed transmission mode

6| IO drive mode (default 1)| l   This bit is used to the module internal pull-up resistor. It also increases the level’s adaptability in case of open drain. But in some cases, it may need external

pull-up resistor.

1| TXD and AUX push-pull outputs, RXD pull-up inputs

0

|

TXD、AUX open-collector outputs, RXD open-collector inputs

5| 4| 3| wireless wake-up time| l  The transmit & receive module work in mode 0, whose delay time is invalid & can be arbitrary value.

l  The transmitter works in mode 1 can transmit the preamble code of the corresponding time continuously.

l  When the receiver works in mode 2, the time means the monitor interval time (wireless wake-up). Only the data from transmitter that works in mode 1 can be

received.

0| 0| 0| 250ms (default)
0| 0| 1| 500ms
0| 1| 0| 750ms
0| 1| 1| 1000ms
1| 0| 0| 1250ms
1| 0| 1| 1500ms
1| 1| 0| 1750ms

1

|

1

|

1

|

2000ms

2| FEC switch| l  After turn off FEC, the actual data transmission rate increases while anti-interference ability decreases. Also the transmission distance is relatively short.

l   Both communication parties must keep

0| Turn off FEC

1

|

Turn on FEC (default)

| | | | on the same pages about turn-on or

turn-off FEC.

---|---|---|---|---
|

For example: The meaning of No.3 “SPED” byte:

The binary bit of the byte| 7| 6| 5| 4| 3| 2| 1| 0
Configures by user| 0| 0| 0| 1| 1| 0| 1| 0
Meaning| UART parity bit 8N1| UART baud rate is 9600| Air data rate is 2.4k
Corresponding hexadecimal| 1| A

Hardware design

• It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, and the module needs to be reliably grounded.；
• Applicable FCC rules, This module is granted by Single Modular Approval. It complies to the requirements of FCC part 15C, section 15.231 rules
• Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse connection may cause permanent damage to the module；
• Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the maximum value the module will be permanently damaged；
• Please check the stability of the power supply, the voltage cannot be fluctuated frequently；
• When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so the whole machine is beneficial for long-term stable operation.；
• The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other parts with large electromagnetic interference.；
• High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part of the module and routed in the Bottom Layer；
• Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer or other layers, which will affect the module’s spurs and receiving sensitivity to varying degrees；
• It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect the performance. It is recommended to keep them away from the module according to the strength of the interference. If necessary, appropriate isolation and shielding can be done；
• Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog, power traces) around the module that will greatly affect the performance of the module. It is recommended to stay away from the module according to the strength of the interference. If necessary, appropriate isolation and shielding can be done.
• If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a risk of damage)；
• The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good antenna extension cable to extend the antenna to the outside；
• The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly weakened.

FAQ

Communication range is too short

• The communication distance will be affected when an obstacle exists.
• Data lose rate will be affected by temperature, humidity, and co-channel interference.
• The ground will absorb and reflect wireless radio waves, so the performance will be poor when testing near ground.
• Seawater has a great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
• The signal will be affected when the antenna is near metal object or put in a metal case.
• The power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the distance).
• The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the transmitting power.
• Due to antenna quality or poor matching between antenna and module.

The module is easy to damage

• Please check the power supply source, ensure it is 3.3V-5.2V, voltage higher than 5.2V will damage the module.
• Please check the stability of the power source, the voltage cannot fluctuate too much.
• Please make sure antistatic measures are taken when installing and using, high-frequency devices have electrostatic susceptibility.
• Please ensure the humidity is within a limited range, some parts are sensitive to humidity.
• Please avoid using modules under too high or too low temperatures.

BER(Bit Error Rate) is high

• There are co-channel signal interference nearby, please be away from interference sources or modify frequency and channel to avoid interference;
• Poor power supply may cause messy code. Make sure that the power supply is reliable.
• The extension line and feeder quality are poor or too long, so the bit error rate is high;

Production guidance

This type is the full-sized module, when the welder welds the module, he must be welding according to the anti-static regulation. This product is allergic to static, randomly welding the module will have the chance of damaging it permanently.

Antenna recommendation

The antenna is an important role in the communication process. A good antenna can largely improve the communication system. Therefore, we recommend use authorization antenna for wireless modules with excellent performance and reasonable price. If not authorization, it couldn’t use.

Package for batch order

OEM Guidance

1. Applicable FCC rules
   This module is granted by Single Modular Approval. It complies to the requirements of FCC part 15C, section 15.231 rules.

2. The specific operational use conditions This module can be used in IoT devices. The input voltage to the module is nominally 5V DC. The operational ambient temperature of the module is 0 to 55 degree C.

3. The notch of the RF module faces outside edge of main board, and the male header corresponds exactly to the pins of the main board;

4. Install the structural cover.

5. Fix the SMA head of the ML-E32 to the structure cover;

6. Press the RF antenna to the corresponding interface position of the ML-E32 module;
   Attention:

7. The SMA head of the RF module faces outwards.

8. Do not insert the male socket and pins of the module incorrectly.

9. Limited module procedures: N/A

10. Trace antenna design: N/A

11. RF exposure considerations. The modular transmitter complies with any applicable RF exposure requirements in its final configuration.

12. Antenna Antenna type: Rod antenna; Peak gain: 2.00dBi

13. Label and compliance information An exterior label on OEM’s end product can use wording such as the following: “Contains Transmitter Module FCC ID: 2AXWEML32E” or “Contains FCC ID: 2AXWEML32E”

14. nformation on test modes and additional testing requirements

15. The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter,perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions).

16. The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance.

17. If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference have been corrected.

18. Additional testing, Part 15 Subpart B disclaimer The final host/module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through (a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation When testing the host product, all the transmitters must be operating.The transmitters can be enabled by using publicly-available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory 50 devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content.

FCC Warnin

Any 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. 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.

Revision history

Contact us

For customer service, please contact your local distributor or contact our following offices:

sales@megalinsource.com Taipei, Taiwan Shenzhen/Suzhou, China + 886-2-86984181 Ext. 53 + 86-755-2774-6923.

For technical support, please contact us at following address:

service@megalinsource.com Taipei, Taiwan

+886-2-86984181 Ext. 32

References

• 傳鼎國際有限公司

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