DeLOCK 12951 User Manual

User manual

IoT LoRa Radio Module 868 MHz 20 dB TTL (3.3 V)

Product-No:12951

User manual no:12951-a

www.delock.com

Main parameter

Performance

Notes

Min.

Max.

Power supply（V）

Voltage over 5.2V will cause permanent

Blocking power（dBm）

Chances of burn is slim when modules

Operating temperature

-40

85

-

Main parameter

Performan

ce

Min

Typ.

Max.

Operating voltage（V）

3.3

5.0

5.2

≥5.0 V ensures output power

Communication level（V）

For 5V TTL, it may be at risk of

Operating temperature

-40

-

85

Industrial design

Operating frequency（MHz）

862

-868

893

Support ISM band

Power

Transmitting current [mA]

-

106

-

Instant power consumption

Receiving current [mA]

-

15

-

Max Tx power（dBm）

19.2

-

20.0

-

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

Test condition：clear and open area, antenna gain: 5dBi，

Maximum capacity of single package, automatic

Buffer

512 Btye

-

Modulation

LoRa™

-

1. Specification and parameter

1.1 Limit parameter

（℃）

1.2 Operating parameter

（℃）

0 5.2

- -10

- 3.3 -

damage to module

are used in short distance

Remark

burning down

consumptio

n

Turn-off current [μA]

Distance for reference 3000m

TX length 58 Btye

- 4 - Software is shut down

antenna height: 2.5m，air data rate: 2.4kbps

subcontracting after exceeding

-1-

Communication interface

TTL

@3.3V

Package

DIP

-

Connector

2.54mm

-

Size

21 * 36mm - Antenna

SMA-K

50 ohm impedance

No.

Name

Direction

Function

Input

Work with M1 to decide 4 working modes of module (not suspended, if

2. Size and pin definition

1 M0

（weak pull-up）

not used, could be grounded).

-2-

Input

Work with M0 to decide 4 working modes of module (not suspended, if

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

4

TXD

Output

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

be configured as open-drain or push-pull output

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

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

No.

Description（STM8L MCU）

2 M1

3 RXD Input

5 AUX Output

（weak pull-up）

not used, could be grounded).

be configured as open-drain or pull-up input.

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

3. Connect to MCU

1 The UART module is TTL level.

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

-3-

4. Function description

4.1 Fixed transmission

4.2 Broadcasting transmission

4.3 Broadcasting address

 For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;

-4-

 When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the

purpose of broadcast is realized.

 5.4 Monitor address

 For example: Set the address of module A as 0xFFFF or 0x0000, 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.

4.5 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.

4.6 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.

4.6.1 Indication of UART output

 To wake up external MCU

4.6.2 Indication of wireless transmitting

 Buffer (empty): the internal 512 bytes data in the buffer are written to the RFIC (Auto sub-packaging).

-5-

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

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

 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.

4.6.3 Configuration procedure of module

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

4.6.4 Notes for AUX

No. Description

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

1

high level.

2

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

-6-

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

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

Mode（0-3）

M0

M1

Mode introduction

Remark

0 Normal

0

UART and wireless channel are open, transparent

The receiver must work in mode 0

1 wake up

1

0

UART and wireless channel are open, the only

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

transmitter must be mode 1,

3 sleep

1

sleep mode, receiving parameter setting command is

more details on

3

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

4

user parameters, during which AUX outputs low level.

5. Operating mode

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

transmission is on

difference with mode 0 is that before transmitting data, increasing the wake up code automatically, so that it can

receiving data, UART open and send data.

available.

or mode 1

unable to transmit in this mode.

parameter specification.

5.1 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

-7-

The condition of data packet transmission & AUX function is the same as mode 0. The only difference is that

mode1 and mode 2.

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.

5.2 Normal mode (mode 0)

Transmitting

Receiving

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

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.

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.

5.3 Wake-up mode (mode 1)

Transmitting

Receiving The same as that in mode 0.

5.4 Power-saving mode (mode 2)

Transmitting

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

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,

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

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.

-8-

Transmitting

N/A

Receiving

N/A

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)

When the mode changes from stand-by mode to others, the module will reset its parameters, during which the

rising edge for user.

C0+working

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 ).

( Save the parameters when power-down )

C2+working

Three C1 are sent in hexadecimal format. The module returns the saved parameters

C2 + 5 bytes working parameters are sent in hexadecimal format. 6 bytes in total and

Three C3 are sent in hexadecimal format. The module returns the version

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.

Receiving

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.

5.5 Sleep mode (mode 3)

Parameter setting

Notes

When M1=1, M0=1, module works in mode 3

AUX keeps low level and then outputs high level after reset completed. It is recommended to check the AUX

6. 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

2 C1+C1+C1

3

4 C3+C3+C3

5 C4+C4+C4

parameters

and must be sent in succession.

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

information and they must be sent in succession.

-9-

type

Default parameter values

C0 00 00 1A 17 44

Transmitting power

Instruction format

Description

In sleep mode（M0=1，M1=1），

Instruction format

Description

In sleep mode（M0=1，M1=1）,User gives the module instruction (HEX format): C3 C3

Instruction format

Description

In sleep mode（M0=1，M1=1）,

check, AUX outputs low level. After reset

 Must be 0xC0 or 0xC2

when

6.1 Default parameters

：：

Model Frequency Address Channel Air data rate Baud rate Parity

E32-433T30D 433MHz 0x0000 0x17 2.4kbps 9600 8N1 1W

6.2 Reading operating parameters

User gives the module instruction (HEX format): C1 C1 C1, Module

C1+C1+C1

returns the present configuration parameters. For example, C0 00 00 1A 17 44.

6.3 Reading version number

C3,Module returns its present version number, for example C3 32 xx yy. the second bytes means

C3+C3+C3

frequency. 32 here means the frequency is 433MHZ, 38 means frequency is 470MHz, 45 means frequency is; 868MHz, 44 means the frequency is 915 MHz, 46 means the frequency is 170MHz; xx is the version number and yy refers to the other module features.

6.4 Reset command

User gives the module instruction (HEX format): C4 C4 C4, the module resets for one time. During

C4+C4+C4

the reset process, the module will conduct selfcompleting, the AUX outputs high level, then the module starts to work regularly which the working mode can be switched or be given another instruction.

6.5 Parameter setting command

No. Item Description Remark

C0: Save the parameters

power-down

C2: Do not save the parameters when power-down

0 HEAD

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

-10-

7

6

UART parity bit

 UART mode can be different between

0

8N1 (default)

0

1

8O1

1

0

8 E1

1

8N1 (equal to 00)

5

4

3

0

1200

0

1

2400

0

1

0

4800

0

1

9600 (default)

1

0

19200

1

0

1

38400

1

0

57600

1

115200

2

1

0

interference performance and longer

0

0.3k

0

1

1.2k

0

1

0

2.4k (default)

0

1

4.8k

1

0

9.6k

1

0

1

19.2k

1

0

19.2k (same to 101)

1

19.2k (same to 101)

General Specifications

Except for E32 (400T20S)

7

6

5

reserved

Communication channel

00H-FFH

1 ADDH

High address byte of module

（the default 00H）

Low address byte of module

00H-FFH

2 ADDL

（the default 00H）

3 SPED

communication parties

TTL UART baud rate（bps）

 UART baud rate can be different

between communication parties

 The UART baud rate has nothing to do

with wireless transmission parameters & won’t affect the wireless transmit / receive features.

Air data rate（bps）

 The lower the air data rate, the longer the

transmitting distance, better anti-

transmitting time

 The air data rate must keep the same for

both communication parties.

4 CHAN

Write 0

00H-1FH, correspond to

-11-

410~441MHz

7

 In fixed transmission mode, the first three

used as high/low address and channel.

The module changes its address and

original setting after complete the

0

Transparent transmission mode

6

IO drive mode (default 1)

 This bit is used to the module internal pull-

1

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

5

4

3

wireless wake-up time

 The transmit & receive module work in

0

250ms (default)

0

1

500ms

0

1

0

750ms

0

1

1000ms

transmit the preamble code of the

time means the monitor interval time

1

0

1250ms

1

0

1

1500ms

1

0

1750ms

2

FEC switch

 After turn off FEC, the actual data

the transmission distance is relatively

0

Turn off FEC

1

0

Transmission power (approximation)

The external power must make sure the

0

30dBm (default)

0

1

27dBm

1

0

24dBm

4-0, channel (410M + CHAN*1M), default 17H（433MHz）

Fixed transmission enabling bit（similar to MODBUS）

bytes of each user's data frame can be

channel when transmit. And it will revert

1 Fixed transmission mode

to

process.

5 OPTION

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

0

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.

inputs

mode 0, whose delay time is invalid &

can be arbitrary value.

 The transmitter works in mode 1 can

corresponding time continuously.

 When the receiver works in mode 2, the

(wireless wake-up). Only the data from transmitter that works in mode 1 can be received.

1 1 1 2000ms

1 Turn on FEC (default)

-12-

transmission rate increases while

anti-interference ability decreases. Also

short.

 Both communication parties must keep

on the same pages about turn-on or turnoff FEC.

ability of current output more than 1A and

ensure the power supply ripple within 100mV.

Low power transmission is not

recommended due to its low power supply

efficiency.

The binary bit of the byte

7

6

5

4

3

2

1

0

Configures by user

0

1

0

1

0

Meaning

UART parity bit 8N1

UART baud rate is 9600

Air data rate is 2.4k

Corresponding hexadecimal

1

A

1 1 21dBm

For example: The meaning of No.3 "SPED" byte:

Support Delock

If you have further questions, please contact our customer support support@delock.de

You can find current product information on our homepage: www.delock.com

Final clause

Information and data contained in this manual are subject to change without notice in advance. Errors and misprints excepted.

Copyright

No part of this user's manual may be reproduced, or transmitted for any purpose, regardless in which way or by which means, electronically or mechanically, without explicit written approval of Delock.

Edition: 05/2019

-13-

Declaration of conformity

Products with a CE symbol fulll the RED directive (2014/53/EU) and RoHS directive (2011/65/EU+2015/863), which were released by the EU-comission.

The declaration of conformity can be downloaded here: http://www.delock.de/service/conformity

WEEE-notice

The WEEE (Waste Electrical and Electronic Equipment)-directive, which became effective as European law on February 13th 2003, resulted in an all out change in the disposal of disused electro devices. The primarily purpose of this directive is the avoidance of electrical waste (WEEE) and at the same time the support of recycling and other forms of recycling in order to reduce waste. The WEEE-logo on the device and the package indicates that the device should not be disposed in the normal household garbage. You are responsible for taking the disused electrical and electronical devices to a respective collecting point. A separated collection and reasonable recycling of your electrical waste helps handling the natural resources more economical. Furthermore recycling of electrical waste is a contribution to keep the environment and thus also the health of men. Further information about disposal of electrical and electronical waste, recycling and the collection points are available in local organizations, waste management enterprises, in specialized trade and the producer of the device.

EU Import: Tragant Handels- und Beteiligungs GmbH Beeskowdamm 13/15, 14167 Berlin, Germany