# WRL-14131 don't read the tag WRL-14151 **URL:** \ **Category:** NFC & RFID\ **Created:** [March 25, 2022, 4:29pm UTC](https://community.sparkfun.com/t/wrl-14131-dont-read-the-tag-wrl-14151/43661 "2022-03-25T16:29:57Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Gerardo\_C](https://avatars.discourse-cdn.com/v4/letter/g/b5e925/32.png) [@Gerardo\_C](https://community.sparkfun.com/u/Gerardo_C)\ **Post date:** [March 25, 2022, 4:29pm UTC](https://community.sparkfun.com/t/wrl-14131-dont-read-the-tag-wrl-14151/43661/1 "2022-03-25T16:29:57Z")
Hello dear, I share the following question with you to see if you can help us. We would like to implement a project with some RFID products from Sparkfun. In order to make a validation test, we are trying to replicate the instructions detailed in the link [https://learn.sparkfun.com/tutorials/si … 1514984116](https://learn.sparkfun.com/tutorials/simultaneous-rfid-tag-reader-hookup-guide/using-an-external-antenna?_ga=2.100670018.255640424.1521734400-36773866.1514984116) We are using the followings products from Sparkfun: Reader **SEN-14066** Antenna **WRL-14131** Tags **WRL-14151** TNC to RP-SMA **CAB-14132** RP-SMA to UFL **WRL-00662** Arduino UNO We have read the tags with the onboard antenna, but when we test with the external antenna the tags are not detected. Please share with us an instructions set in order to test the external antenna isolated from the system, in order to validate separately if it is OK, and some recommendations to use it. We look forward to your help. ---
**Author:** ![paulvha](https://avatars.discourse-cdn.com/v4/letter/p/65b543/32.png) [@paulvha](https://community.sparkfun.com/u/paulvha)\ **Post date:** [March 25, 2022, 6:11pm UTC](https://community.sparkfun.com/t/wrl-14131-dont-read-the-tag-wrl-14151/43661/2 "2022-03-25T18:11:11Z")
have you changed the solder jumper from onboard to external antenna as mentioned in [https://learn.sparkfun.com/tutorials/si … al-antenna](https://learn.sparkfun.com/tutorials/simultaneous-rfid-tag-reader-hookup-guide/using-an-external-antenna). Else can you share pictures ? ---
**Author:** ![Gerardo\_C](https://avatars.discourse-cdn.com/v4/letter/g/b5e925/32.png) [@Gerardo\_C](https://community.sparkfun.com/u/Gerardo_C)\ **Post date:** [March 30, 2022, 4:41pm UTC](https://community.sparkfun.com/t/wrl-14131-dont-read-the-tag-wrl-14151/43661/3 "2022-03-30T16:41:35Z")
> paulvha: > have you changed the solder jumper from onboard to external antenna as mentioned in [https://learn.sparkfun.com/tutorials/si … al-antenna](https://learn.sparkfun.com/tutorials/simultaneous-rfid-tag-reader-hookup-guide/using-an-external-antenna). Else can you share pictures ? We have made that connection but still the antenna does not receive anything ![Jumper.jpeg](https://canada1.discourse-cdn.com/sparkfun/original/3X/e/2/e2c42e8107d46698a78f55475e55467a605d17b8.jpeg) ---
**Author:** ![paulvha](https://avatars.discourse-cdn.com/v4/letter/p/65b543/32.png) [@paulvha](https://community.sparkfun.com/u/paulvha)\ **Post date:** [March 30, 2022, 5:00pm UTC](https://community.sparkfun.com/t/wrl-14131-dont-read-the-tag-wrl-14151/43661/4 "2022-03-30T17:00:02Z")
It is hard to see the soldering for the switch from internal to external antenna. Can you make a (very) close picture of that ?