# INA219 measurement problem above 16V

**URL:** <https://discourse.nodered.org/t/ina219-measurement-problem-above-16v/85373>\
**Category:** General\
**Tags:** function-node, flowfuse\
**Created:** [9 February 2024 15:30 UTC](https://discourse.nodered.org/t/ina219-measurement-problem-above-16v/85373 "2024-02-09T15:30:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![noctis-61](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/noctis-61/32/88170_2.png) [@noctis-61](https://discourse.nodered.org/u/noctis-61)\
**Post date:** [9 February 2024 15:30 UTC](https://discourse.nodered.org/t/ina219-measurement-problem-above-16v/85373/1 "2024-02-09T15:30:28Z")

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Hello Guys,

I have a problem with the voltage measurement in Node-RED with the INA219 flow  
([node-red-contrib-easybotics-ina219-sensor (node) - Node-RED](https://flows.nodered.org/node/node-red-contrib-easybotics-ina219-sensor))

The voltage changes when it reaches approx. 16V and goes negative.  
How can I solve the problem? Do you have a suggestion for me?

I would look forward to an answer, thank you very much and greetings.

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [9 February 2024 15:46 UTC](https://discourse.nodered.org/t/ina219-measurement-problem-above-16v/85373/2 "2024-02-09T15:46:15Z")

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Probably the same issue that was reported (and unresolved) over 3y ago: [Wrong voltage calculation · Issue #9 · easybotics/node-red-contrib-easybotics-ina219 · GitHub](https://github.com/easybotics/node-red-contrib-easybotics-ina219/issues/9)

You could attempt a DIY solution:

Include this [library](https://www.npmjs.com/package/ina219-async) in a function node setup tab and write code for reading your sensor (the README has code examples)

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 May 2024 15:47 UTC](https://discourse.nodered.org/t/ina219-measurement-problem-above-16v/85373/3 "2024-05-09T15:47:02Z")

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