# Node modbus v.5.15 not support node.js 16.9.1

**URL:** <https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432>\
**Category:** General\
**Created:** [29 November 2021 04:14 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432 "2021-11-29T04:14:00Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![sarawut](https://avatars.discourse-cdn.com/v4/letter/s/848f3c/32.png) [@sarawut](https://discourse.nodered.org/u/sarawut)\
**Post date:** [29 November 2021 04:14 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/1 "2021-11-29T04:14:00Z")

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Hi all,  
I have question for when i install node.js v.16.9.1 and after that install modbus in plellte menu. It shown error not support please see picture need to install modbus v.6+ please help me for this case.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/2/42864abbd4a24f43e6d5dbc7a98f4f922038f9b9.png)

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [29 November 2021 08:45 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/2 "2021-11-29T08:45:28Z")

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Well as it says you can either go back and install nodejs 14 or you can raise an issue against that node on github and ask if the author will update it to support node16.

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**Author:** ![sarawut](https://avatars.discourse-cdn.com/v4/letter/s/848f3c/32.png) [@sarawut](https://discourse.nodered.org/u/sarawut)\
**Post date:** [29 November 2021 09:25 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/3 "2021-11-29T09:25:25Z")

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Thank you for your answer. How to downgrade node v 16 to 14

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [29 November 2021 10:08 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/4 "2021-11-29T10:08:59Z")

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Assuming you're using 64bit windows then uninstall the existing node.js and then get the 14.x package - [https://nodejs.org/dist/latest-v14.x/node-v14.18.1-x64.msi](https://nodejs.org/dist/latest-v14.x/node-v14.18.1-x64.msi)

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [29 November 2021 11:08 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/5 "2021-11-29T11:08:18Z")

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After downgrading nodejs you must also rebuild all nodes. To do that, go into your .node-red folder and run  
`npm rebuild`

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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:** [28 January 2022 11:09 UTC](https://discourse.nodered.org/t/node-modbus-v-5-15-not-support-node-js-16-9-1/54432/6 "2022-01-28T11:09:02Z")

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