INTOIOT YN3731B LED Display Ultrasonic Liquid Level Indicator Module
Fa'amatalaga o oloa
- Igoa o oloa: YN3731 LED Display Ultrasonic Liquid Level Indicator Module
- File Fa'aliliuga: V25.6.11
- Output Methods: RS485, 4-20mA, DC0-10V, and more
Fa'atonuga o le Fa'aaogaina o Mea
Filifiliga Oloa
The product comes in different models based on the output method:
- YN3731B: RS-485
- YN3731M: 4-20mA
- YN3731V10: DC0-10V
Tele oloa ma Fa'apipi'i
Refer to the product manual for detailed instructions on wiring and installation.
Fesootaiga Fesootaiga
The product uses the RS-485 MODBUS-RTU standard protocol format. The default device address is 1.
Faitauga Faamatalaga
- Send the inquiry frame with Function code 0x03 to read data.
- Example command to read data of device No. 1: 01 03 00 00 00 01 84 0A
- The device will respond with data in hexadecimal format.
Fa'amatalaga Tulaga masani
This table provides information on register addresses, data types, and value ranges for configuration.
Faitau ma Suia le tuatusi o le masini
To query the device address if unknown, use the command FA 03 00 66 00 01 71 9E.
Vaega Fa'atekinisi
| Parakalafa fa'apitoa | Fa'atatauga |
| lautele | 0~5.0m |
| sa'o | ±5mm |
| Fa'afeso'ota'i | RS485/4-20mA/DC0-10V |
| Malosiaga | DC6~24V 1A |
| Malosiaga | DC12~24V 1A |
| Tafe le vevela | -30~80 ℃ |
| Susū galue | 5%RH~90%RH |
Filifiliga Oloa
Product Design RS485, 4 20mA, DC0 10VMultiple output methods, the products are divided into the following models depending on the output method.
| Fa'ata'ita'iga o oloa | metotia faatino |
| YN3731B | RS-485 总线 |
| YN3731M | 4-20mA |
| YN3731V10 | DC0-10V |
Tele o oloa
In the case of broken wires, wire them as shown in the figure. If the product itself has no leads, the core color is for reference.
Fa'aaogā Fa'atonuga
Ultrasonic liquid level sensors are mainly used in hydrological monitoring, urban pipe networks, and water level measurement in firewater tanks.

Lisi o oloa
Fesootaiga Fesootaiga
O lo'o fa'aaogaina e le oloa le RS485 MODBUS-RTU standard protocol format, ma o fa'atonuga uma po'o fa'atonuga tali o lo'o i fa'amaumauga hexadecimal. Pe a tuua e le masini le falegaosimea, o le tuatusi o le masini e le mafai ona maua o le 1, ma o le faaletonu o le baud rate o le: mo modules ma mea e le puʻeina: 9600, 8, n, 1 (mo oloa faʻamaumauga, o le faaletonu o le: 115200, 8, n, 1).
Faitau fa'amaumauga (Function code 0x03)
Le faavaa su'esu'e (i le hexadecimal). ExampLe o le auina atu: Ina ia fesiligia 1 fasi pepa o le masini Numera 1, e auina atu e le komepiuta talimalo le poloaiga: 01 03 00 00 00 01 84 0A .
| tuatusi | Code galuega | Tulaga amata | Umi o fa'amaumauga | Su'ega |
| 01 | 03 | 00 00 | 00 01 | 84 0A |
For a correct inquiry frame, the device will respond with data: 01 03 02 02 18 B9 2E, and the response format is:
| tuatusi | Code galuega | Umi | Faʻamatalaga 1 | Su'ega |
| 01 | 03 | 02 | 02 18 | B9 2E |
- Faʻamatalaga faʻamatalaga: O faʻamaumauga i le poloaiga o loʻo i le hexadecimal. Aveina Fa'amatalaga 1 e pei o se fa'ata'ita'igaample, 02 18 liua i le tau decimal o le 536. Fa'apea o le fa'asili fa'asili o fa'amaumauga o le 100, o le tau moni o le 536/100 = 5.36, ae o isi e mafai ona fa'atusalia.
Fa'amatalaga Tulaga masani
| Tuatusi Fa'atonu | Tuatusi Resitala | Tusi Resitala Faʻamatalaga | Ituaiga Fa'amatalaga | Tulaga Taua |
| 40001 | 00 00 | Faitau Na'o | 0~65535 | |
| 40101 | 00 64 | Fa'ata'ita'iga Code | Faitau-na'o | 0~59999 |
| 40102 | 00 65 | Aofa'i Numera o
Mea e fua ai |
Faitau-na'o | 1~1600 |
| 40103 | 00 66 | Tulaga o masini | Faitau/Tusi | 1~249 |
| 40104 | 00 67 | Fua Faatatau o Baud | Faitau/Tusi | 0~6 |
| 40105 | 00 68 | Fesootaiga
Faiga |
Faitau/Tusi | 1 Fesili |
| 40106 | 00 69 | Ituaiga Protocol | Faitau/Tusi | 1 MODBUS-RTU |
Faitau ma sui le tuatusi o le masini
- Faitau pe fesiligia le tuatusi o le masini
- Afai e te le iloa le tuatusi masini o loʻo i ai nei ma e naʻo le tasi le masini i luga o le pasi, e mafai ona e fesiligia le tuatusi o le masini e ala i le faʻatonuga FA 03 00 66 00 01 71 9E.
Tulaga masini Code galuega Tulaga amata Umi o fa'amaumauga Su'ega FA 03 00 66 00 01 71 9E - FA, o le 250, o le tuatusi lautele. A e le iloa le tuatusi, e mafai ona e faʻaogaina le 250 e maua ai le tuatusi o le masini. 00 66 o le resitala o le tuatusi o le masini.
- Mo se fa'atonuga fesili sa'o, o le a tali mai le masini. Mo exampLe, o faʻamatalaga tali o le: 01 03 02 00 01 79 84. O le faʻasologa o faʻamatalaga o loʻo faʻaalia i le laulau o loʻo i lalo:
Tulaga masini Code galuega Tulaga amata ID tuatusi Su'ega 01 03 02 00 01 79 84 - I faʻamatalaga tali, o le muamua byte 01 o loʻo faʻatusalia le tuatusi moni o le masini o loʻo iai nei.
- Afai e te le iloa le tuatusi masini o loʻo i ai nei ma e naʻo le tasi le masini i luga o le pasi, e mafai ona e fesiligia le tuatusi o le masini e ala i le faʻatonuga FA 03 00 66 00 01 71 9E.
- Change the device address.
- Mo example, if the current device address is 1 and you want to change it to 02, the command is: 01 06 00 66 00 02 E8 14.
Tulaga masini Code galuega Resitala tuatusi Tuatusi autu Su'ega 01 06 00 66 00 02 E8 14 - A maeʻa le suiga, o le a toe faʻafoʻi e le masini le faʻamatalaga: 02 06 00 66 00 02 E8 27. O le faʻavasegaina o suʻesuʻega o loʻo faʻaalia i le laulau o loʻo i lalo:
Tulaga masini Code galuega Resitala tuatusi Tuatusi autu Su'ega 02 06 00 66 00 02 E8 27 - In the response data, after the modification is successful, the first byte is the new device address. Generally, after the device address is changed, it takes effect immediately. At this time, users need to modify the query commands in their software accordingly.
- Mo example, if the current device address is 1 and you want to change it to 02, the command is: 01 06 00 66 00 02 E8 14.
Read and modify the baud rate.
- Faitau le paud rate
- O le faaletonu o le gaosiga o le gaosiga o le masini o le 9600. Afai e te manaʻomia le suia, e mafai ona e faia le suiga suiga e tusa ai ma le laulau o loʻo i lalo ma le fesoʻotaʻiga fesoʻotaʻiga talafeagai. Mo example, to read the baud rate ID of the current device, the command is: 01 03 00
67 00 01 35 D5. The format analysis is as follows.Tulaga masini Code galuega Tulaga amata Umi o fa'amaumauga Su'ega 01 03 00 67 00 01 35 D5 - Faitau le code baud rate o le masini o iai nei. Fa'ailoga o le fua o le Baud: 1 mo le 2400; 2 mo le 4800; 3 mo le 9600; 4 mo le 19200; 5 mo le 38400; 6 mo le 115200.
- Mo se fa'atonuga fesili sa'o, o le a tali mai le masini. Mo exampLe, o faʻamatalaga tali o le: 01 03 02 00 03 F8 45. O le faʻavasegaina o suʻesuʻega o loʻo faʻaalia i le laulau o loʻo i lalo:
Tulaga masini Code galuega Umi o fa'amaumauga Faailoga o fua faatatau o le Baud Su'ega 01 03 02 00 03 F8 45 - E tusa ai ma le numera o le paud rate, o le 03 o loʻo faʻatusalia ai le 9600, o lona uiga o le taimi nei o le paud rate o le masini e 9600.
- O le faaletonu o le gaosiga o le gaosiga o le masini o le 9600. Afai e te manaʻomia le suia, e mafai ona e faia le suiga suiga e tusa ai ma le laulau o loʻo i lalo ma le fesoʻotaʻiga fesoʻotaʻiga talafeagai. Mo example, to read the baud rate ID of the current device, the command is: 01 03 00
- Suia le paud rate.
- Mo example, to change the baud rate from 9600 to 38400, that is, change the code from 3 to 5, the command is: 01 06 00 67 00 05 F8 16.
Tulaga masini Code galuega Resitala tuatusi Fuainumera pa'u sini Su'ega 01 06 00 67 00 05 F8 16 - Suia le baud rate mai le 9600 i le 38400, o lona uiga, sui le code mai le 3 i le 5. O le a aoga vave le baud rate. I le taimi nei, o le a le toe tali mai le masini, ma e manaʻomia ona toe faʻaleleia le faʻatonuga o fesili mo le paʻu o le masini.
- Mo example, to change the baud rate from 9600 to 38400, that is, change the code from 3 to 5, the command is: 01 06 00 67 00 05 F8 16.
Faitau ma sui le tau fa'asa'oga (e aoga mo nisi oloa)
- Faitau le tau faasa'oga
- A i ai se mea sese i le va o faʻamaumauga ma le faʻasologa o faʻamatalaga, e mafai ona tatou faʻaitiitia le faʻaaliga faʻaalia e ala i le fetuunaʻi o le "tau faʻasaʻo". O le fetu'una'iga o le eseesega o le fa'asa'oga e fa'aopoopo pe to'ese 1000, o lona uiga, o le tau o le 0 - 1000 po'o le 64535 - 65535.ample, when the displayed value is 100 less than the actual value, we can correct it by adding 100. The command is: 01 03 00 6B 00 01 F5 D6. In the command, 100 is the hexadecimal value 0x64. If you need to decrease the value, you can set a negative value. For example, - 100 e fetaui ma le tau hexadecimal FF 9C. Ole fua fa'atatau ole 100 – 65535 = 65435, ona fa'aliliu lea ile hexadecimal, ole 0x FF 9C. Ole tau ole fa'asa'oga ole masini e amata ile 00 6B. Matou te ave le parakalafa muamua o se example mo se fa'ata'ita'iga. A tele fa'amaufa'ailoga, o metotia mo le faitau ma le fa'aleleia o le tau fa'asa'oga e tutusa.
Tulaga masini Code galuega Tulaga amata Umi o fa'amaumauga Su'ega 01 03 00 6B 00 01 F5 D6 - Mo se fa'atonuga fesili sa'o, o le a tali mai le masini. Mo example, o faʻamatalaga tali: 01 03 02 00 64 B9 AF. O lo'o fa'aalia le au'ili'iliga o le fa'asologa i le siata lenei:
Tulaga masini Code galuega Umi o fa'amaumauga Fa'asa'oga taua Su'ega 01 03 02 00 64 B9 AF - I faʻamatalaga tali, o le muamua byte 01 o loʻo faʻatusalia le tuatusi moni o le masini o loʻo i ai nei, ma 00 6B o le resitala mo le faʻasaʻoga o le suiga muamua o le setete. Afai o le masini e tele faʻamaufaʻailoga, o le faʻaogaina o metotia mo isi faʻasologa e tutusa. E masani lava, o masini vevela ma le susu e iai lenei parakalafa, a'o masini moli e masani lava e leai.
- A i ai se mea sese i le va o faʻamaumauga ma le faʻasologa o faʻamatalaga, e mafai ona tatou faʻaitiitia le faʻaaliga faʻaalia e ala i le fetuunaʻi o le "tau faʻasaʻo". O le fetu'una'iga o le eseesega o le fa'asa'oga e fa'aopoopo pe to'ese 1000, o lona uiga, o le tau o le 0 - 1000 po'o le 64535 - 65535.ample, when the displayed value is 100 less than the actual value, we can correct it by adding 100. The command is: 01 03 00 6B 00 01 F5 D6. In the command, 100 is the hexadecimal value 0x64. If you need to decrease the value, you can set a negative value. For example, - 100 e fetaui ma le tau hexadecimal FF 9C. Ole fua fa'atatau ole 100 – 65535 = 65435, ona fa'aliliu lea ile hexadecimal, ole 0x FF 9C. Ole tau ole fa'asa'oga ole masini e amata ile 00 6B. Matou te ave le parakalafa muamua o se example mo se fa'ata'ita'iga. A tele fa'amaufa'ailoga, o metotia mo le faitau ma le fa'aleleia o le tau fa'asa'oga e tutusa.
- Change the correction value.
- Mo example, if the current state variable value is too small and we want to increase its real value by 1, the command to correct the current value by adding 100 is: 01 06 00 6B 00 64 F9 FD.
Tulaga masini Code galuega Resitala tuatusi Tuatusi autu Su'ega 01 06 00 6B 00 64 F9 FD - A maeʻa le taʻaloga, o le a toe faʻafoʻi e le masini faʻamatalaga: 01 06 00 6B 00 64 F9 FD. A mae'a le suiga, e aoga loa le parakalafa.
- Mo example, o le laina o le 0 ~ 5% RH, o le analog output o le 4 ~ 20mA faailoilo o loʻo i ai nei, susu ma le taimi nei O le faʻatusatusaga o fesoʻotaʻiga e pei ona faʻaalia i le fua faʻatatau: C = (A2-A1) * (X-B1) / (B2 -B1) + A1, pe a A2 o le maualuga pito i luga, A1 o le pito i lalo o le laina, B2 o loʻo i ai nei galuega faʻatapulaʻa pito i luga, B1 o le pito i lalo, X o le tau o le susu o loʻo faitau nei, ma C o le fuafuaina. tau o lo'o iai nei. O le lisi o tau fa'aaoga masani e fa'apea:
taimi nei(mA) SusūValue (%RH) Fa'asologa Fa'atatau 4 0.0 (5-0)*(4-4)÷(20-4)+0 5 0.3 (5-0)*(5-4)÷(20-4)+0 6 0.6 (5-0)*(6-4)÷(20-4)+0 7 0.9 (5-0)*(7-4)÷(20-4)+0 8 1.3 (5-0)*(8-4)÷(20-4)+0 9 1.6 (5-0)*(9-4)÷(20-4)+0 10 1.9 (5-0)*(10-4)÷(20-4)+0 11 2.2 (5-0)*(11-4)÷(20-4)+0 12 2.5 (5-0)*(12-4)÷(20-4)+0 13 2.8 (5-0)*(13-4)÷(20-4)+0 14 3.1 (5-0)*(14-4)÷(20-4)+0 15 3.4 (5-0)*(15-4)÷(20-4)+0 16 3.8 (5-0)*(16-4)÷(20-4)+0 17 4.1 (5-0)*(17-4)÷(20-4)+0 18 4.4 (5-0)*(18-4)÷(20-4)+0 19 4.7 (5-0)*(19-4)÷(20-4)+0 20 5.0 (5-0)*(20-4)÷(20-4)+0 - E pei ona faʻaalia i le fua faʻatatau i luga, pe a fua le 8mA, o loʻo iai nei o le 5.25% RH.
- Mo example, o le tele o le 0 ~ 5% RH, o le gaioiga analog o 0 ~ 10V DC0-10Vvoltage faailo, susu ma DC0-10Vvoltage O le fa'atusatusaga o feso'ota'iga o lo'o fa'aalia i le fua fa'atatau: C = (A2-A1) * (X-B1) / (B2-B1) + A1, pe a A2 o le maualuga o le susu, A1 o le pito i lalo o le laina, B2 o le DC0-10Vvoltage fa'agata pito i luga, B1 o le tapula'a pito i lalo, X o le tau susū o lo'o faitauina nei, ma C o le DC0-10Vvol fuafuaina.tage taua. Ole lisi o tau fa'aaoga masani e fa'apea:
DC0-10Vvoltagu (V) SusūValue (%RH) Fa'asologa Fa'atatau 0 0.0 (5-0)*(0-0)÷(10-0)+0 1 0.5 (5-0)*(1-0)÷(10-0)+0 2 1.0 (5-0)*(2-0)÷(10-0)+0 3 1.5 (5-0)*(3-0)÷(10-0)+0 4 2.0 (5-0)*(4-0)÷(10-0)+0 5 2.5 (5-0)*(5-0)÷(10-0)+0 6 3.0 (5-0)*(6-0)÷(10-0)+0 7 3.5 (5-0)*(7-0)÷(10-0)+0 8 4.0 (5-0)*(8-0)÷(10-0)+0 9 4.5 (5-0)*(9-0)÷(10-0)+0 10 5.0 (5-0)*(10-0)÷(10-0)+0 - As shown in the above formula, when measuring 5V, the current DC0-10V voltage 2.5% RH.
- Mo example, if the current state variable value is too small and we want to increase its real value by 1, the command to correct the current value by adding 100 is: 01 06 00 6B 00 64 F9 FD.
Fa'ailoga
This document provides all information about the product, does not grant any license to intellectual property, does not express or imply, and prohibits any other means of granting any intellectual property rights, such as the statement of sales terms and conditions of this product, or other issues. No liability is assumed. Furthermore, our company makes no warranties, express or implied, regarding the sale and use of this product, including the suitability for the specific use of the product, the marketability, or the infringement liability for any patent, copyright, or other intellectual property right etc. Product specifications and product descriptions may be modified at any time without notice.
Faafesootai matou
- Kamupani: Shanghai Sonbest Industrial Co., Ltd INTOIOT Brand Division Address: Building 8, No. 215 Northeast Road, Baoshan District, Shanghai, China
- Web: http://www.intoiot.cn
- Web: http://www.intoiot.com
- SKYPE: soobuu
- imeli: sale@sonbest.com
- Telefoni: 86-021-51083595 / 66862055/66862075/66861077
FAQ
- How do I select the appropriate output method for my application?
Refer to the product model specifications to choose the output method that best suits your requirements. - What is the default device address and baud rate?
The default device address is 1, and the default baud rate varies based on the product series.
Pepa / Punaoa
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