JP1 Remotes

I've gone down a bit of a rabbit hole here, forgive me as this is my first time doing anything with JP1.x, but first let me explain.

I'm digitising some old VHS tapes with some fairly expensive and out of date equipment. I have a JVC S-VHS player which has incorrectly been enabling S-VHS mode (resulting in garbled image) due to something it's interpreting on two of the tapes. This can apparently be switched off only by sending a special command to the player via a service remote. Of course, service remotes are not generally available and my choices are really to make an arduino with an infrared sender (IR sender not currently available in my country) or another choice, a remote capable of discrete hex codes which I have now purchased.

The remote of course is too new to support old codes like these via simple discrete codes programmed at the remote itself, so then I found I could do it via JP programming. However I have attempted to do a basic connection to the remote and while I can see it is communicating (I can also see I receive data when I press buttons), I am unable to successfully complete 'Download from Remote' in Remote master.

It appears to be a JP1.4 device from the code I got from using the flashing led method (36675) though I'm not sure why others have 6 digits in the other similar remotes in the forum perhaps I'm following an old guide.

To connect to the remote I initially tried MAC, but then moved to linux due to the Mac seemingly not working properly. I could use windows if I must but as far as I can tell the system is working correctly, I've correctly identified the serial port and I know I can get data via that when I press remote buttons so I don't think it's an issue.

I've got two usb to serial devices for this, a Raspberry Pi Debug Probe (using an RP2040 chip)and a Duinotech Arduino Compatible USB to serial adapter with FT232 chip. Neither of these seem to work, though I can see the LED's both sending and receiving data when using certain pinouts.

The pins on the remote (when right way up and viewing through the battery compartment) are in the format:

XXX
1XX

There is a one by that pin, so I guess this to be

456
123.

So far I've found
1=Positive
2=Ground
5&6 are sending signals from button presses but each respond to different buttons
4&3 therefore must be receive and or perhaps a reset from what I'm reading.

Because I'm new here I really don't have any idea what I'm doing with JP connections yet.

My initial questions are, does the arduino device seem like it would work with this chip?

Is there anything special needing to be done for JP1.4? I've read potentially that it may require a reset connection to work properly.

Is there a page with this remote already? Because the ones I've seen so far seem to be different.

Also, are there any must read articles especially that help me navigate this site? I'd really love to get this problem solved!

Thanks!

Marshalleq.

See the first post in https://www.hifi-remote.com/forums/viewtopic.php?t=16360

Here's some of the info in that post:
Pinout is
1-3-5
2-4-6.

Pin 1 should not be connected.
Pin 2 connects to RTS
Pin 3 connects to Ground
Pin 4 connects to TXD
Pin 5 should not be connected
Pin 6 Connects to RXD

We have a RDF file for 366705 (URC-7145 Evolve 4 R02), which means at least one other person has successfully used this remote with RMIR. Actually I think there a number of users with this remote.

Most people use a USB to serial adapter using the FT232 chip. You do need a line to connect RTS-- that's the signal that initiates communication with the remote.

Thanks, but one thing makes me think this is not the same remote - the pin that you call 2 (but is labelled 1 on mine), is connected to the + terminal of the battery compartment. I confirmed this with a multimeter and did a continuity test with the terminal and that pin (as per what I wrote above). As far as I know, the positive pin cannot be anything other than positive? Or can it be RTS? Because that's what you have said it is in your example.

I have disassembled this remote and taken pictures of the inside, however there doesn't seem to be a way to upload images here only link to them so if someone knows a RELIABLE way to host external images (so many of these turn into dead links) please advise.

Anyway, on the inside the remote says

SA070A3679-A

UEBV OFA Evolve 2016 4 Device
URC 11-7145 R00
60062-5038000 V01
May 2016
11HBA
C 94HB
2420
QF21928A
1-4

It also says JP1_4 at the pinout

So this at least explains why it might be different I think as it sounds a lot older and appears to be R00 instead of R02[/img]

I was simply correcting the erroneous idea that the pins are labeled along a row. Go to the link in my first post and scroll down to the fourth group of photos. That shows an exact drawing of the pinout. All JP1 remotes with 6 pin headers have the same pinout. Don't worry about which revision you have. RMIR will figure it out.

marshalleq wrote:I have disassembled this remote and taken pictures of the inside, however there doesn't seem to be a way to upload images here only link to them so if someone knows a RELIABLE way to host external images (so many of these turn into dead links) please advise.

https://www.hifi-remote.com/forums/viewtopic.php?t=6557

marshalleq wrote:... ..
The pins on the remote (when right way up and viewing through the battery compartment) are in the format:

XXX
1XX

There is a one by that pin, so I guess this to be

456
123.
...Marshalleq.

Not sure why you wish to renumber the jp1 pins in your own order when this site states it should be (when viewing the pins above the battery compartment)
246
135
Where pin1 has 1 or dot and pins 5&6 are nearest the notch.
Eg http://www.hifi-remote.com/wiki/index.php/JP1_Cables
and https://www.ebay.co.uk/itm/326489128150

What's on the sticker in the battery compartment? If it's a R00 variant then it may have 16:9 and 3D keys.
Later variants probably have Home and N instead.

3FG wrote:I was simply correcting the erroneous idea that the pins are labeled along a row. Go to the link in my first post and scroll down to the fourth group of photos. That shows an exact drawing of the pinout. All JP1 remotes with 6 pin headers have the same pinout. Don't worry about which revision you have. RMIR will figure it out.

Thanks very much, this makes more sense as it aligns with my remote, whereas what you wrote above actually contradicts this (you had the top bottom rows opposite), but I understand we don't always remember things in a rush like that and I appreciate the steer thankyou.

The Robman wrote:

marshalleq wrote:I have disassembled this remote and taken pictures of the inside, however there doesn't seem to be a way to upload images here only link to them so if someone knows a RELIABLE way to host external images (so many of these turn into dead links) please advise.

https://www.hifi-remote.com/forums/viewtopic.php?t=6557

Thanks, they have disabled email logins for new users instead locking you into EITHER Apple or Google, neither of which I want to be locked into, so that's not going to work.

rem wrote:

marshalleq wrote:... ..
The pins on the remote (when right way up and viewing through the battery compartment) are in the format:

XXX
1XX

There is a one by that pin, so I guess this to be

456
123.
...Marshalleq.

Not sure why you wish to renumber the jp1 pins in your own order when this site states it should be (when viewing the pins above the battery compartment)
246
135
Where pin1 has 1 or dot and pins 5&6 are nearest the notch.
Eg http://www.hifi-remote.com/wiki/index.php/JP1_Cables
and https://www.ebay.co.uk/itm/326489128150

What's on the sticker in the battery compartment? If it's a R00 variant then it may have 16:9 and 3D keys.
Later variants probably have Home and N instead.

I didn't want to anything, it's just what I was guessing. I am new here and didn't realise there was a standard pinout.

My remote has Home and N keys.

OK, in summary:

My remote pinout is:

2-4-6
1-3-5

As per above:

Pin 1 should not be connected.
Pin 2 connects to RTS
Pin 3 connects to Ground
Pin 4 connects to TXD
Pin 5 should not be connected
Pin 6 Connects to RXD

My serial adapter has:

My Adapter ----- JP1 Interface
1 - Gnd ------ Pin 3 Ground
2 - CTS ------ not connected
3 - 5V ----- not connected
4 - TXD ----- Pin 4 TXD
5 - RXD ----- Pin 6 RXD
6 - DTR ----- Pin 2 RTS

My research shows that DTR can 'sometimes' be used for RTS in serial setups, but could this be the problem? Do you guys have an actual RTS output on your serial adapters? If so, I guess I'm going to have to order something from outside my country which I was trying to avoid in the interest of time. Unless there's an arduino hack I can do.

Because I just get no remotes found all the time. RAW data download also comes up with this error.

marshalleq wrote:

The Robman wrote:

marshalleq wrote:I have disassembled this remote and taken pictures of the inside, however there doesn't seem to be a way to upload images here only link to them so if someone knows a RELIABLE way to host external images (so many of these turn into dead links) please advise.

https://www.hifi-remote.com/forums/viewtopic.php?t=6557

Thanks, they have disabled email logins for new users instead locking you into EITHER Apple or Google, neither of which I want to be locked into, so that's not going to work.

You don't even have to sign up, do you see the green "New Post" box in the upper left corner?



Click on that and it takes you to the page below, where you can paste your image.

I think I need an adapter with RTS pin, so will progress that.