# I can not connect Rockblock 2v.c with openmv h7

**URL:** <https://forums.openmv.io/t/i-can-not-connect-rockblock-2v-c-with-openmv-h7/7281>\
**Category:** OpenMV Boards\
**Created:** [July 7, 2022, 6:30am UTC](https://forums.openmv.io/t/i-can-not-connect-rockblock-2v-c-with-openmv-h7/7281 "2022-07-07T06:30:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Ertugrul](https://avatars.discourse-cdn.com/v4/letter/e/ce73a5/32.png) [@Ertugrul](https://forums.openmv.io/u/Ertugrul)\
**Post date:** [July 7, 2022, 6:30am UTC](https://forums.openmv.io/t/i-can-not-connect-rockblock-2v-c-with-openmv-h7/7281/1 "2022-07-07T06:30:20Z")

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I can not download firmware for openmv h7. Now ı have firmware 4.3.1(lastest) version and ı try to use uart connection my all wired is true ım sure about that but openmv is not connect with rockblock v2.c over uart do you have any idea

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**Author:** ![iabdalkader](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.openmv.io/iabdalkader/32/1169_2.png) [@iabdalkader](https://forums.openmv.io/u/iabdalkader)\
**Post date:** [July 7, 2022, 7:54pm UTC](https://forums.openmv.io/t/i-can-not-connect-rockblock-2v-c-with-openmv-h7/7281/2 "2022-07-07T19:54:51Z")

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I wouldn’t know why something you’re trying to connect is not working. Try checking TX/RX maybe they’re swapped, and make sure the boards have a common ground (GND-\>GND).

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**Author:** ![Ertugrul](https://avatars.discourse-cdn.com/v4/letter/e/ce73a5/32.png) [@Ertugrul](https://forums.openmv.io/u/Ertugrul)\
**Post date:** [July 19, 2022, 10:29am UTC](https://forums.openmv.io/t/i-can-not-connect-rockblock-2v-c-with-openmv-h7/7281/3 "2022-07-19T10:29:04Z")

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tahnks for reply i did it