# Problems with A / D converter 3008 and Node-Red

**URL:** <https://discourse.nodered.org/t/problems-with-a-d-converter-3008-and-node-red/18112>\
**Category:** General\
**Created:** [18 November 2019 19:35 UTC](https://discourse.nodered.org/t/problems-with-a-d-converter-3008-and-node-red/18112 "2019-11-18T19:35:53Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![seppel1078](https://avatars.discourse-cdn.com/v4/letter/s/e8c25b/32.png) [@seppel1078](https://discourse.nodered.org/u/seppel1078)\
**Post date:** [18 November 2019 19:35 UTC](https://discourse.nodered.org/t/problems-with-a-d-converter-3008-and-node-red/18112/1 "2019-11-18T19:35:53Z")

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Hi,

I would like to read the values of my MCP3008 via Node-Red. By Python script I get to the values so everything is already connected and configured correctly.

I installed Node-Red as an instance of IOBroker

This node was installed: [https://flows.nodered.org/node/node-red-node-pi-mcp3008](https://flows.nodered.org/node/node-red-node-pi-mcp3008)

If I activate the node in Node-Red this error message appears in the log of IOBroker:

```auto
node-red.0	2019-11-17 23:13:26.200	error	17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.200	error	17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.200	error	17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.200	error	(3702) 17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.196	error	17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.196	error	17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.196	error	(3702) 17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied
node-red.0	2019-11-17 23:13:26.193	error	(3702) 17 Nov 23:13:26 - [error] [pimcp3008:c67d27b1.34a37] Error: Error: EACCES, Permission denied

```

and in the debug of Node-Red comes:

```auto
Error: Error: EACCES, Permission denied

```

because someone can start something and tell me where the problem lies?

Greeting Volker

---

<div class="post-metadata">

**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:** [18 November 2019 22:31 UTC](https://discourse.nodered.org/t/problems-with-a-d-converter-3008-and-node-red/18112/2 "2019-11-18T22:31:44Z")

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You may be best asking the IObroker folk. Not sure anyone here knows how they have configured permissions for things like gpio pins.