# Control I2C relay board in Node Red Dashboard using in Smartphone

**URL:** <https://discourse.nodered.org/t/control-i2c-relay-board-in-node-red-dashboard-using-in-smartphone/7208>\
**Category:** Dashboard\
**Created:** [24 January 2019 13:02 UTC](https://discourse.nodered.org/t/control-i2c-relay-board-in-node-red-dashboard-using-in-smartphone/7208 "2019-01-24T13:02:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Varul92](https://avatars.discourse-cdn.com/v4/letter/v/b4bc9f/32.png) [@Varul92](https://discourse.nodered.org/u/Varul92)\
**Post date:** [24 January 2019 13:02 UTC](https://discourse.nodered.org/t/control-i2c-relay-board-in-node-red-dashboard-using-in-smartphone/7208/1 "2019-01-24T13:02:31Z")

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Hi, in my earlier post I got to know about displaying the Node-Red dashboard in Smartphone, As for making it works with the smartphone, as well as the Laptop, it should be running on the same network, but whenever I am trying access the dashboard IP: [http://127.0.0.1:1880/ui/#/0](http://127.0.0.1:1880/ui/#/0) in the smartphone, Then the connection error message is displayed.

In my project, I am using the I2C Relay board which is connected with Arduino and with the help of serial node and button I am trying to switch on the relays

Any kind of suggestion on this one will be a great help.

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [24 January 2019 13:12 UTC](https://discourse.nodered.org/t/control-i2c-relay-board-in-node-red-dashboard-using-in-smartphone/7208/2 "2019-01-24T13:12:02Z")

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127.0.0.1 is the local loopback address of the device that is running node-red.  
On your smartphone you should use the assigned IP address of that device instead (something like 192.168.0.x)

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**Author:** ![Varul92](https://avatars.discourse-cdn.com/v4/letter/v/b4bc9f/32.png) [@Varul92](https://discourse.nodered.org/u/Varul92)\
**Post date:** [24 January 2019 13:20 UTC](https://discourse.nodered.org/t/control-i2c-relay-board-in-node-red-dashboard-using-in-smartphone/7208/3 "2019-01-24T13:20:01Z")

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Thank you so much for reply, Now I open it on my smart phone