# ADC0 output reading problem

**URL:** <https://forum.legato.io/t/adc0-output-reading-problem/4219>\
**Category:** Uncategorized\
**Created:** [March 22, 2019, 6:34am UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219 "2019-03-22T06:34:29Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![RaghuDM](https://avatars.discourse-cdn.com/v4/letter/r/a3d4f5/32.png) [@RaghuDM](https://forum.legato.io/u/RaghuDM)\
**Post date:** [March 22, 2019, 6:34am UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/1 "2019-03-22T06:34:29Z")

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I am read ADC0 in wp7607, i am getting low digital value, as it is 15 bit resolution, giving 1v to ADC pin digital value should be more than 15000, but i am getting 899 from the adc read

It will be great if somebody helps me in resolving this issue

Thanks  
Raghu DM

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**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\
**Post date:** [March 26, 2019, 2:25pm UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/2 "2019-03-26T14:25:22Z")

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Hi @RaghuDM,  
can you elaborate more your use case , please?  
in which platform is embedded your device? which firmware is used? which legato release?  
how do you proceed to read the ADC?  
Best Regards

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**Author:** ![JayM2M](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@JayM2M](https://forum.legato.io/u/JayM2M)\
**Post date:** [March 27, 2019, 1:29pm UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/3 "2019-03-27T13:29:46Z")

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If you are using Legato API `le_adc_ReadValue()` then the result should be in mV:

> For all platforms, channels are externally available for general use, and by default use 1.8V reference and **return results in mV**

> **[Analog to Digital Converter - Legato Docs](https://docs.legato.io/19_02/platformConstraintsAdc.html)**
>
> legato™ is an open source Linux-based embedded platform designed to simplify connected IoT application development

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**Author:** ![RaghuDM](https://avatars.discourse-cdn.com/v4/letter/r/a3d4f5/32.png) [@RaghuDM](https://forum.legato.io/u/RaghuDM)\
**Post date:** [March 28, 2019, 6:40am UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/4 "2019-03-28T06:40:21Z")

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Ok, Thanks for your Reply

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**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\
**Post date:** [April 4, 2019, 7:48am UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/5 "2019-04-04T07:48:51Z")

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hi @RaghuDM,  
did you solve your issue?  
BR

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**Author:** ![RaghuDM](https://avatars.discourse-cdn.com/v4/letter/r/a3d4f5/32.png) [@RaghuDM](https://forum.legato.io/u/RaghuDM)\
**Post date:** [April 4, 2019, 11:39am UTC](https://forum.legato.io/t/adc0-output-reading-problem/4219/6 "2019-04-04T11:39:32Z")

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Yes, I solved that issue, Thank you