Winsen ZE29A-C2H5OH Alcohol Sensor Module User Manual

Winsen ZE29A-C2H5OH Alcohol Sensor Module

Model No.：ZE29A-C2H5OH
Zhengzhou Winsen Electronics Technology Co., Ltd

Statement

• This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without written permission, any part of this manual shall not be copied, translated, or stored in a database or retrieval system, and also can’t be spread through electronic, copying, or record ways.
• Thanks for purchasing our product. To let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly by the instructions. If users disobey the terms or remove, disassemble, or change the components inside of the sensor, we shall not be responsible for the loss.
• The specifics such as color, appearance, sizes …etc., please in kind prevail.
• We are devoting ourselves to product development and technical innovation, so we reserve the right to improve the products without notice. Please confirm it is the valid version before using this manual. At the same time, users’ comments on the optimized using way are welcome.
• Please keep the manual properly, to get help if you have questions during the usage in the future.

Profile

The ZE29A-C2H5OH electrochemical alcohol sensor module is to detect exhaled alcohol gas. With an electrochemical alcohol sensor as a core part and a built-in temperature compensation sensor, it has high accuracy, high sensitivity, and strong anti-interference ability. It’s integrated with pressure sensor, which can realize blowing action detection to further ensure the accuracy of measurement.
This product is suitable for alcohol detection of drunk driving or before work.

Features

• High-precision and high-sensitivity
• UART output
• Blow interruption alarm
• High stability and strong anti-interference ability

Application

Portable alcohol detector;
Car alcohol testing

Technical Parameters

Display accuracy

| Gas concentration(mg/l)| Accuracy
C＜0.400| ±0.050mg/l
C≥0.400| ±10%
Blow continuity detection| 4 second(can be customized, flow: ≥ 10L/min)
Working temperature| 10℃~40℃
Storage temperature| -10℃~70℃
Module size| 853318mm

DIMENSION

PIN Definition

(voltage input 5V)

2| GND
3| UART (TXD) 3.3V TTL OUTPUT
4| UART (RXD) 3.3V TTL INPUT

Communication protocol

General setting

Frame format

| Command| Function description
---|---|---

SEND

|

Data 0

|

Data 1

|

Data 2

|

Data 3

|

Data 4

|

Data 5

|

Data 6

|

Data 7

|

Data 8

Start| address| command| Data| Check sum
0xFF| 0x01| | Data 1| Data 2| Data 3| Data 4| Data 5|

Return

| Data 0| Data 1| Data 2| Data 3| Data 4| Data 5| Data 6| Data 7| Data 8
Start| Command| Data| Check sum
0xFF| | Data 1| Data 2| Data 3| Data 4| Data 5| Data 6|

1. The module address is fixed as: 0x01.
2. Integer data has the high byte first and the low byte last.
3. Check value algorithm: (negative (data 1 + data 2 + … + data 7)) + 1.
4. Command code:
5. 0x85: Query module status
6. 0x86: read test results
7. 0x87: Switch module working status
8. 0x88: Read blow time
9. 0x89: Set the blowing time
10. 0x90: Read drinking threshold
11. 0x91: Set drunk threshold
12. 0x92: Read blow pressure threshold
13. 0x93: Set blow pressure threshold

Guidelines of Commands

Command ：0x85-Query module status

NO.| Comm

and

| Function description
---|---|---

SEN D

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| address| comm

and

| –| –| –| –| –| Check

sum

0xFF| 0x01| 0x85| 0| 0| 0| 0| 0| 0x7A
EXP.| FF 01 85 00 00 00 00 00 7A

RETU RN

| 0| 1| 2| 3| 4| 5| 6| 7| 8

Start

| comma nd| modul

e status

| ****

–

| ****

–

| ****

–

| ****

–

| ****

–

| Check sum
0xFF| 0x85| 0x31| 0| 0| 0| 0| 0| 0x4A
EXP.| FF 85 31 00 00 00 00 00 4A

Module Status：

• 0x31:In idle state, the module is in the standby state, waiting to receive instructions.
• 0x32: preheating state, in which the module is preheated for 10 seconds, and then automatically enters the ‘waiting for air blowing state’.
• 0x33: waiting for blowing, the module waits for blowing, and automatically enters the ‘blowing state’ after blowing;If there is no air blowing, the module will automatically enter the ‘idle state’ after 1 minute.
• 0x34: in the blowing state, after continuous blowing for 4 seconds, the module automatically enters the ‘calculating state’; Otherwise, the module will enter the ‘blowing interruption state’.
• 0x35: the air blowing is interrupted. After this state lasts for 3 seconds, it will automatically re-enter the ‘preheating state’.
• 0x36: in the calculation state, after this state lasts for 2~5 seconds, it will automatically enter the ‘read result state’.
• 0x37: reading the result state, in which the test result can be read, and it will automatically enter the ‘idle state’ after 20 seconds.

Command： 0x86-Read Test Result

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Addre ss| Comman d| –| –| –| –| –| Check sum
0xFF| 0x01| 0x86| 0| 0| 0| 0| 0| 0x79
EXP.| FF 01 86 00 00 00 00 00 79

Return

| 0| 1| 2| 3| 4| 5| 6| 7| 8

Start

| Comm and| ****

Alcohol content

| ****

–

| ****

–

| ****

–

| Alarm Status| Check sum
0xFF| 0x86| High Byte| Low Byte| 0| 0| 0| 0|
EXP.| FF 86 00 5A 00 00 00 02 1E

Alcohol content: 0x005a (hexadecimal) =90 (decimal) unit: mg/100ml

Alarm status:

• 0x00: no alcohol, alcohol content <20mg/100ml.
• 0x01: drinking, 20mg/100ml ≤ alcohol content ＜ 80mg/100ml.
• 0x02: drunk, alcohol content ≥ 80mg/100ml.

Note ：This command can only be read when the module is in the ‘read result state’.
Command ：0x87-Switch module working status

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Address| Command| Target Status| –| –| –| –| Check sum
0xFF| 0x01| 0x87| 0x31| 0| 0| 0| 0| 0x47
EXP.| FF 01 87 31 00 00 00 00 47

Return

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Comma nd| Switching Result| –| –| –| –| –| Check sum
| 0xFF| 0x87| 0x01| 0| 0| 0| 0| 0| 0x78
---|---|---|---|---|---|---|---|---|---
EXP.| FF 87 01 00 00 00 00 00 78

Destination state: the state to be entered
Switching result: 0x01: switching succeeded 0x02: switching failed

The three switchable states are as follows:

1. in the idle state (0x31), it can be switched to the warm-up state (0x32).
2. In the read result state (0x37), it can be switched to the idle state (0x31).
3. In the reading result state (0x37), it can be switched to the preheating state (0x32).

Command ：0x88-Read blowing time

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Address| Comman d| –| –| –| –| –| Check sum
0xFF| 0x01| 0x88| 0| 0| 0| 0| 0| 0x77
EXP.| FF 01 88 00 00 00 00 00 77

Retur n

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Comma nd| Blowing time| –| –| –| –| –| Check sum
0xFF| 0x88| 0x04| 0| 0| 0| 0| 0| 0x74
EXP.| FF 88 04 00 00 00 00 00 74

• Blowing time : the blowing time set by the current module. When the continuous blowing time reaches this time, the electromagnet will act to sample the gas. Unit: s. The range of this parameter is 1~10.

Command： 0x89-Set the blowing time

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Address| Comma nd| Blowing time| –| –| –| –| Check sum
0xFF| 0x01| 0x89| 0x04| 0| 0| 0| 0| 0x72
EXP.| FF 01 89 04 00 00 00 00 72
---|---

Return

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Comma nd| Setting Result| –| –| –| –| –| Check sum
0xFF| 0x89| 0x01| 0| 0| 0| 0| 0| 0x76
EXP.| FF 89 01 00 00 00 00 00 76

• Blowing time : the blowing time set by the current module. When the continuous blowing time reaches this time, the electromagnet will act to sample the gas. Unit: s. The range of this parameter is 1~10.
• Setting result : 0x01: setting succeeded 0x02: setting failed

Command ：0x90-Read drinking threshold

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Address| Comma nd| –| –| –| –| –| Check sum
0xFF| 0x01| 0x90| 0| 0| 0| 0| 0| 0x6F
EXP.| FF 01 90 00 00 00 00 00 6F

Retur n

| 0| 1| 2| 3| 4| 5| 6| 7| 8

Start

| ****

Comman d

| drinking threshol d| Drunke nness threshol d| ****

–

| ****

–

| ****

–

| ****

–

| ****

Check sum

0xFF| 0x90| 0x14| 0x50| 0| 0| 0| 0| 0x0C
EXP.| FF 90 14 50 00 00 00 00 0C

• Drinking threshold : the threshold for judging drinking alarm, 0x14 (hexadecimal) =20 (decimal), unit: mg/100ml. The parameter range is: 15~220mg/100ml
• Drunkenness threshold: the threshold for judging drunkenness alarm, 0x50 (hexadecimal) =80 (decimal), unit: mg/100ml, the parameter range is: 15~220mg/100ml

Command ：0x91-Set drunk threshold

NO.

| Comm and| ****

Function Description

---|---|---

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
---|---|---|---|---|---|---|---|---|---

Start

| ****

Address

| ****

Comma nd

| ****

drinking thresho ld

| Drunke nness thresho ld| ****

–

| ****

–

| ****

–

| ****

Check sum

0xFF| 0x01| 0x91| 0x14| 0x50| 0| 0| 0| 0x0A
EXP.| FF 01 91 14 50 00 00 00 0A

Return

| 0| 1| 2| 3| 4| 5| 6| 7| 8

Start

| Comma nd| Setting result| ****

–

| ****

–

| ****

–

| ****

–

| ****

–

| Check sum
0xFF| 0x91| 0x01| 0| 0| 0| 0| 0| 0x6E
EXP.| FF 91 01 00 00 00 00 00 6E

• Drinking threshold : the threshold for judging drinking alarm, 0x14 (hexadecimal) =20 (decimal), unit: mg/100ml
• Drunkenness threshold : the threshold for judging drunkenness alarm, 0x50 (hexadecimal) =80 (decimal), unit: mg/100ml
• Setting result: 0x01: setting succeeded 0x02: setting failed
• Note : the range of alcohol and intoxication threshold can be set as 15~220mg/100ml, and the alcohol and intoxication threshold must be greater than the alcohol threshold.

Command： 0x92-Read blow pressure threshold

SEND

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Addres s| Command| –| –| –| –| –| Check sum
0xFF| 0x01| 0x92| 0| 0| 0| 0| 0| 0x6D
EXP.| FF 01 92 00 00 00 00 00 6D

Retur n

| 0| 1| 2| 3| 4| 5| 6| 7| 8
Start| Comma nd| Pressure threshold| –| –| –| –| –| Check sum
0xFF| 0x92| 0x08| 0| 0| 0| 0| 0| 0x66
EXP.| FF 92 08 00 00 00 00 00 66

• Pressure threshold: the threshold value for detecting the blowing pressure, 0x08 (hexadecimal) =8 (decimal), with a range of 5~200
• Command： 0x93-Set blow pressure threshold
• Pressure threshold: the threshold value for detecting the blowing pressure, 0x08 (hexadecimal) =8 (decimal), with a range of 5~200
• Setting result: 0x01: setting succeeded 0x02: setting failed

Note:

1. The module needs to be used in conjunction with the blowpipe when using it. The blowpipe structure must be designed by the customer.
2. Pay attention to the connection of the 5V power supply.
3. In the mold design, the alcohol sensor needs to be fixed on the structure to prevent the alcohol sensor from loosening after long-term work, which will cause failure.
4. When designing the blowpipe structure, two points need to be paid special attention to. One is that a barrier is needed in the blowpipe to generate piezoresistance. In addition, the blowing direction of the blowpipe needs to be fixed, that is, the pressure sampling hole needs to be in the front and the alcohol sampling hole is behind in the blowing direction.
5. The module must not be used in an environment containing corrosive gas, which will damage the sensor.
6. The air inlet of the sensor on the module must not be blocked or polluted.
7. The module must not be subjected to excessive impact or vibration.
8. After long-term use in a high-concentration gas environment, the time for the sensor to recover to its initial state is slow.

Zhengzhou Winsen Electronics Technology Co., Ltd
Add : No.299, Jinsuo Road, National Hi-Tech Zone, Zhengzhou 450001 China
Tel: +86-371-67169097/67169670
Fax: +86-371-60932988
E-mail : sales@winsensor.com
www.winsen-sensor.com
Tel: 86-371-67169097/67169670
Fax : 86-371-60932988
Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!

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