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Oct 07, 2020, 10:15 AM
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Jumper R1 uninverted smartport works with f4


Today I decided to start a blog here. Over the past few days I managed to modify a jumper R1 to work with uninverted S.port to a Noxe V1 F4. After a bit of investigation I saw a few ppl on this site had tried but failed to modify/connect the rx correctly.
The problem with this receive is that the uninverted point is driven by a c04 inverter. 1 Option would be to replace the C04 with a C05 and a pull up resistor. The easier option is to remove both C04 inverters and place a jumper between pin 2 and pin 5 on pads of both removed C04s.
I've attached a pic of the mods. It is pretty messy due to PCB damage but you should get the idea
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Oct 08, 2020, 03:26 AM
Registered User
Hi, thanks for sharing.
I have the same problem with the Jumper R1 + and the Omnibus F4 nano v6.0
Does your solution work with the R1 + (plus)?
Oct 08, 2020, 03:53 AM
Registered User
Thread OP
Quick update, I said bridge pin2 and pin 5, that should be pin 2 and pin4. Pin 5 is vcc.
Also if you connect to both TX and RX pin on the FC you should not need a pull up resistor.
Here is a pic shpwing poll from RX and response from FC.
Oct 09, 2020, 01:12 AM
Registered User
Quote:
Originally Posted by picoely
Hi, thanks for sharing.
I have the same problem with the Jumper R1 + and the Omnibus F4 nano v6.0
Does your solution work with the R1 + (plus)?
Thanks


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