# Any idea how to connect Vx3 receiver to fsesc 75350 with only one uart port which is occupied already by the the Bluetooth module
**URL:** https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564
**Category:** Electronics (ESC, remote, batteries)
**Created:** [December 15, 2025, 8:52pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564 "2025-12-15T20:52:20Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@Trikefloats](https://foil.zone/u/Trikefloats)
#### Post date: [December 15, 2025, 8:52pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/1 "2025-12-15T20:52:20Z")
Any idea how to connect Vx3 receiver to fsesc 75350 which has only one uart port that is occupied by the the Bluetooth module . I can probably use the comm port but then I have to modify somehow one of the cables that came with the vx3 and I’m afraid I may destroy the controller if I make a mistake in my cable modification. I’m sure somebody have been on this path before me. Thank you in advance
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### Author:  [@HOF](https://foil.zone/u/HOF)
#### Post date: [December 15, 2025, 10:08pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/2 "2025-12-15T22:08:37Z")
I do not have an answer but will soon face the same issue so if you find out, let us know how you did it!
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### Author:  [@Foilguy](https://foil.zone/u/Foilguy)
#### Post date: [December 15, 2025, 10:43pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/3 "2025-12-15T22:43:23Z")
There should be a cable in your VX3 package that you can use.
Look at wiring diagram for VX3 and same for Comm port of vesc.
The vesc end of cable will have a connector that fits the comm port. It should have 4 wires that supply the TX, RX, GRD and power the receiver needs. Configure VESC for UART control of remote
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### Author:  [@HOF](https://foil.zone/u/HOF)
#### Post date: [December 16, 2025, 10:46am UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/4 "2025-12-16T10:46:08Z")
This is already taken by the Bluetooth module and as far as i know just connecting additional wires to it for the receiver will not work. You showed a simple connection between RX and VESC - which is fine but we need to connect bluetooth module on it as well somehow
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### Author:  [@windego](https://foil.zone/u/windego)
#### Post date: [December 16, 2025, 2:32pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/5 "2025-12-16T14:32:12Z")
There are 2 different rx/tx pairs on the vesc labelled 4 and 6 on the diagram… Mine is all taped up but I have the bt and receiver working as you need. You just need to find the correct cable in the supplied packet. I thnk there are little manuals with he info included.
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### Author:  [@windego](https://foil.zone/u/windego)
#### Post date: [December 16, 2025, 3:03pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/6 "2025-12-16T15:03:15Z")
> **[Having trouble using Flipsky bluetooth?](https://flipsky.net/blogs/vesc-tool/having-trouble-using-flipsky-bluetooth)**
>
> Once in a while we need to deal with troubleshooting like I connected bluetooth just as the diagram on your website, why isn’t it working? Or my phone is not reading the data of the ESC, what’s wrong?
> There are two things you need to...
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### Author:  [@Foilguy](https://foil.zone/u/Foilguy)
#### Post date: [December 16, 2025, 3:27pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/7 "2025-12-16T15:27:09Z")
> [@HOF](#):
>
> This is already taken by the Bluetooth module and as far as i know just connecting additional wires to it for the receiver will not work. You showed a simple connection between RX and VESC - which is fine but we need to connect bluetooth module on it as well somehow
Well I was just answering @Trikefloats question as he said his Bluetooth was already connected 🤨
The Bluetooth and remote receiver both require a TX and RX pair plus GRD and power. The Flipsky receiver diagram shows it requires 5V and I think the Bluetooth module would work at either 3.3 or 5V
I don’t use the Flipsky 75300 but assuming you are and that you are using Flipsky Bluetooth you have two ports on the VESC that have those capabilities ports 5 and 6 in the diagram.
As @windego says just find the correct cable and connect them up.
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### Author:  [@Trikefloats](https://foil.zone/u/Trikefloats)
#### Post date: [December 21, 2025, 9:32pm UTC](https://foil.zone/t/any-idea-how-to-connect-vx3-receiver-to-fsesc-75350-with-only-one-uart-port-which-is-occupied-already-by-the-the-bluetooth-module/25564/8 "2025-12-21T21:32:17Z")
Thank you for the picture. It looks like it’s going to work. Not tested it yet but everything fits. I’m still building the battery pack. Thanks again