# Change modbus address

**URL:** <https://discourse.nodered.org/t/change-modbus-address/89767>\
**Category:** General\
**Created:** [25 July 2024 20:08 UTC](https://discourse.nodered.org/t/change-modbus-address/89767 "2024-07-25T20:08:42Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jupiter8](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@jupiter8](https://discourse.nodered.org/u/jupiter8)\
**Post date:** [25 July 2024 20:08 UTC](https://discourse.nodered.org/t/change-modbus-address/89767/1 "2024-07-25T20:08:42Z")

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Hi, i'm tring to change the modbus address of a sens0483 wind speed sensor and i can't make it with the modbus write node. Here' the datasheet:  
 ![IMG_2868](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/c/8/c89b35e3f3904f212e2c19e9bcd044ec7a957889.jpeg)  
I tried all combination possible and i understant that 0x10 is 16 but there is another datasheet that says 0x1000 wich is 4096.  
[https://wiki.dfrobot.com/RS485\_Wind\_Speed\_Transmitter\_SKU\_SEN0483#target\_7](https://wiki.dfrobot.com/RS485_Wind_Speed_Transmitter_SKU_SEN0483#target_7)  
Also whatever length i try to inject it alaways complain with

```auto
Error: Quantity should be less or equal to register payload array length: undefined Addr: 16 Q: 1

```

I also found the array to send with an arduino to change to address 3 it looks like this:  
{0x00, 0x10, 0x10, 0x00, 0x00, 0x01, 0x02, 0x00, 0x03, 0xFA, 0x00}

I'm a bit lost to say the least.

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**Author:** ![magicfire](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/magicfire/32/93420_2.png) [@magicfire](https://discourse.nodered.org/u/magicfire)\
**Post date:** [27 July 2024 05:28 UTC](https://discourse.nodered.org/t/change-modbus-address/89767/2 "2024-07-27T05:28:19Z")

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have you tried node-red-node-serialport?

 ![1722058058552](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/a/8ad1b9e552410ddb6d6f7863535d65055fd05233.jpeg)

 ![1722058071048](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/b/1b81461633087c199d510896f1beceda3d28ab8c.jpeg)

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<div class="post-metadata">

**Author:** ![jupiter8](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@jupiter8](https://discourse.nodered.org/u/jupiter8)\
**Post date:** [27 July 2024 14:57 UTC](https://discourse.nodered.org/t/change-modbus-address/89767/3 "2024-07-27T14:57:48Z")

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thanks, i finally did it with an arduino but this could work, i will test it.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [25 October 2024 14:58 UTC](https://discourse.nodered.org/t/change-modbus-address/89767/4 "2024-10-25T14:58:33Z")

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