# Analog inputs error in simulator

**URL:** <https://forum.makecode.com/t/analog-inputs-error-in-simulator/446>\
**Category:** Arcade\
**Created:** [August 14, 2019, 5:59pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446 "2019-08-14T17:59:35Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kjw](https://avatars.discourse-cdn.com/v4/letter/k/e79b87/32.png) [@kjw](https://forum.makecode.com/u/kjw)\
**Post date:** [August 14, 2019, 5:59pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446/1 "2019-08-14T17:59:35Z")

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Using the `feather` extension in `beta beta` (`0.13.22 / 5.19.9`) and attempting to read the analogue inputs in the simulator fails with the (runtime?) error message: `Program Error: Cannot read property 'analogReadPin' of null`. Screenshot of the relevant code and error below:

 ![arcade-Input-Experiment-screenshot-simulatorprogramerror-20190814](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/1X/813c25a164e02906e57bf21ac2f5305c9bc1bc25.png)

This works on the PyGamer - the values look reasonable for the left (from front) D3 and right D2 JST PH 3pin interfaces.

![arcade-Input-Experiment-v1](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/1X/359ebff934a021d7448447a4c775ca975bcaf807.png)

Should I stick a ticket in for this?

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**Author:** ![kjw](https://avatars.discourse-cdn.com/v4/letter/k/e79b87/32.png) [@kjw](https://forum.makecode.com/u/kjw)\
**Post date:** [August 14, 2019, 6:50pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446/2 "2019-08-14T18:50:09Z")

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I’m also getting suspicious of the temperature on the PyGamer always being 21 degrees C.

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**Author:** ![richard](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/richard/32/5417_2.png) [@richard](https://forum.makecode.com/u/richard)\
**Post date:** [August 14, 2019, 8:54pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446/3 "2019-08-14T20:54:19Z")

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Yep! Please post issues on [https://github.com/microsoft/pxt-arcade/issues](https://github.com/microsoft/pxt-arcade/issues)

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<div class="post-metadata">

**Author:** ![kjw](https://avatars.discourse-cdn.com/v4/letter/k/e79b87/32.png) [@kjw](https://forum.makecode.com/u/kjw)\
**Post date:** [August 14, 2019, 9:40pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446/4 "2019-08-14T21:40:37Z")

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Done. [https://github.com/microsoft/pxt-arcade/issues/1210](https://github.com/microsoft/pxt-arcade/issues/1210)

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<div class="post-metadata">

**Author:** ![peli](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/peli/32/12_2.png) [@peli](https://forum.makecode.com/u/peli)\
**Post date:** [March 3, 2020, 6:11pm UTC](https://forum.makecode.com/t/analog-inputs-error-in-simulator/446/5 "2020-03-03T18:11:11Z")

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Fixed in [arcade.makecode.com/beta](http://arcade.makecode.com/beta) .