# Failed to install node-red-contrib-pca9685 after installing all all prerequisite

**URL:** <https://discourse.nodered.org/t/failed-to-install-node-red-contrib-pca9685-after-installing-all-all-prerequisite/13987>\
**Category:** General\
**Created:** [4 August 2019 09:35 UTC](https://discourse.nodered.org/t/failed-to-install-node-red-contrib-pca9685-after-installing-all-all-prerequisite/13987 "2019-08-04T09:35:19Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![SonoraTechnical](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/sonoratechnical/32/20033_2.png) [@SonoraTechnical](https://discourse.nodered.org/u/SonoraTechnical)\
**Post date:** [7 October 2020 04:04 UTC](https://discourse.nodered.org/t/failed-to-install-node-red-contrib-pca9685-after-installing-all-all-prerequisite/13987/8 "2020-10-07T04:04:52Z")

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I'd like to follow up with this....

If you follow this thread: [Error installing i2c-bus for PCA9865 node](https://discourse.nodered.org/t/error-installing-i2c-bus-for-pca9865-node/9840/19)

From replies 19-21.. You will see how we are instructed to use a forked node (same fork that dceejay wants rolled back into the master) to utilize the PCA9685 Out node... I did it.... and succeeded testing it by dimming an LED with an inexpensive Adafruit board that utilizes that NXP pwm chip... Check out the thread for a work around...

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_[View the full topic](https://discourse.nodered.org/t/failed-to-install-node-red-contrib-pca9685-after-installing-all-all-prerequisite/13987)._