# Rock Pi i2C in node red

**URL:** <https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844>\
**Category:** General\
**Created:** [18 November 2022 16:46 UTC](https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844 "2022-11-18T16:46:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![LinkView\_Maze](https://avatars.discourse-cdn.com/v4/letter/l/94ad74/32.png) [@LinkView\_Maze](https://discourse.nodered.org/u/LinkView_Maze)\
**Post date:** [18 November 2022 16:46 UTC](https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844/1 "2022-11-18T16:46:21Z")

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Hello

following the shortage of Rpi I wanted to test the RockPI.I did all the installations of Debian and NR.

I want to use the mcp23017-chip node (working perfectly on RPI) but it doesn't work on the RockPI.  
However I chose 0x22 or 21 as it tells me in the command "sudo mraa-i2c detect 0"

avez vous deja essayer de faire cela ou faire fonctionner NR sur Rockpi ?

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**Author:** ![giuseppedevito](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/giuseppedevito/32/72407_2.png) [@giuseppedevito](https://discourse.nodered.org/u/giuseppedevito)\
**Post date:** [11 December 2022 13:47 UTC](https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844/2 "2022-12-11T13:47:06Z")

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The kernel of rockpi os (neither 4.4 nor 5.15) has not  
The mcp23017 driver (aka gpio-mcp23s08 for 4.4, pinctrl-mcp23s08 for 5.10) included neither built-in nor as a loadable module.  
If you try to recompile your kernel including this driver and load the module at boot you Will find the device /sys/class/gpio/gpiochip496 ....but After this, i m experiencing a lot of instability of the the board (a rockpi 4 se) that Is freezing randomly After almost a day of Activity.  
IMHO Rockpi has a long Road ahead (mainly on the documentation) to be compared with the loved RPi

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<div class="post-metadata">

**Author:** ![LinkView\_Maze](https://avatars.discourse-cdn.com/v4/letter/l/94ad74/32.png) [@LinkView\_Maze](https://discourse.nodered.org/u/LinkView_Maze)\
**Post date:** [12 December 2022 13:26 UTC](https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844/3 "2022-12-12T13:26:27Z")

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Thank you for this feedback (even if it does not help my development). Between that and the I2C that works with MRAA not supported by NR

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [10 February 2023 13:27 UTC](https://discourse.nodered.org/t/rock-pi-i2c-in-node-red/70844/4 "2023-02-10T13:27:04Z")

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