Problems with A / D converter 3008 and Node-Red

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

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

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:

Error: Error: EACCES, Permission denied

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

Greeting Volker

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