# Fibaro Smart Implant and DS18B20 **URL:** \ **Category:** Questions & Help\ **Created:** [October 22, 2022, 2:43pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001 "2022-10-22T14:43:15Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![spajder\_ua](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/spajder_ua/32/33983_2.png) [@spajder\_ua](https://community.homey.app/u/spajder_ua)\ **Post date:** [October 22, 2022, 2:43pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/1 "2022-10-22T14:43:15Z")
Hi, Does anybody now how to connect more then one DS18B20 to the Smart implant? I can connect one and it shows up fine in homey, but when I try to connect one more and add the device again none of the DS18B20 shows up 😕 ---
**Author:** ![DieJan](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/diejan/32/23130_2.png) [@DieJan](https://community.homey.app/u/DieJan)\ **Post date:** [October 27, 2022, 3:31pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/2 "2022-10-27T15:31:09Z")
Hi, What I notice is that the amount of sensors you can add, depends on the length of the sensor cables but also on the power supply. For example, I was able to add 5 sensors with cables of 3 meter, but not 3 sensors with cables of 10 meter. Also using a power supply of 24V gives better results, with enough power of course. ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 1, 2023, 4:38pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/3 "2023-11-01T16:38:21Z")
Some problem here. With two sensors I cannot even add the device. Might be that the databus is not working correctly, as it needs an pull up resistor of 4,7k Ohm. I have to wait for the delivery of the resistor. ![IMG_2873](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/6/e/6e4c9d6b019ee2e6a286f0058af4b5c2e704fce8.jpeg) ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [November 1, 2023, 5:10pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/4 "2023-11-01T17:10:12Z")
In the **O P E R A T I N G M A N U A L** is the next picture: ( No resistor mentioned ) ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/0/90e3978c0febfe4019480392858893d77bd3b993.png) ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 1, 2023, 5:32pm UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/5 "2023-11-01T17:32:51Z")
With 2 sensors step 5 is not successful. The 1st sensor has 1m cable, the 2nd 3 m. I will test to connect the 3m sensor only. The pull-up is for defining good signals on the databus. These signal, especially the high signal, will get worse with longer lines and multiple sensors. So to exclude this possible cause, I will add this pull-up resistor. By the way, a bus network is shown, but I made it a star. That also has its limitations, making a short bus with long stubs. I will let you know the results. FYI: [https://forum.fibaro.com/topic/52629-tutorial-attaching-ds18b20-temperature-sensors-to-a-smart-implant/](https://forum.fibaro.com/topic/52629-tutorial-attaching-ds18b20-temperature-sensors-to-a-smart-implant/) ---
**Author:** ![Robin\_De\_Lange](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robin_de_lange/32/25173_2.png) [@Robin\_De\_Lange](https://community.homey.app/u/Robin_De_Lange)\ **Post date:** [November 2, 2023, 12:00am UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/6 "2023-11-02T00:00:51Z")
i had this working with 4 sensors and a smart implant, you need to reset the devices and connect all the sensors and than pair the sensor like you normal do to homey, worked for my like this ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 2, 2023, 12:07am UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/7 "2023-11-02T00:07:04Z")
After connecting the second sensor, pairing just fails. When I remove the second sensor, pairing is fine. I will just run some more test to find the problem. ---
**Author:** ![Robin\_De\_Lange](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robin_de_lange/32/25173_2.png) [@Robin\_De\_Lange](https://community.homey.app/u/Robin_De_Lange)\ **Post date:** [November 2, 2023, 1:24am UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/8 "2023-11-02T01:24:18Z")
Yes. But with removing the device it doesnt reset it self. You need to find a way to reset it and than pair it again ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 2, 2023, 7:04am UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/9 "2023-11-02T07:04:26Z")
I found the reset procedure on page 18 and will test it. > **[FGBS-222-EN-T-v1.2.pdf](https://manuals.fibaro.com/content/manuals/en/FGBS-222/FGBS-222-EN-T-v1.2.pdf)** > > 762.00 KB ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [November 2, 2023, 11:37am UTC](https://community.homey.app/t/fibaro-smart-implant-and-ds18b20/71001/10 "2023-11-02T11:37:49Z")
Thanks, It is now working with 2 sensors, 1 sensor with 1 meter cable and 1 sensor with 3 meter cable. I had to follow the procedure a few times. When paring the device, wait for the red led after the you pushed the button 3 times, before pushing the buttons 3 times fast again.