DWIZ-ADAPT

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Re: DWIZ-ADAPT

Postby woodygb » 19 Jun 2021, 13:17

Dynamic has TWO different program interface variants.

One is simple and just requires a RS232 - USB and 3 wires.... the other requires a homebrew electronic interface.

Which one you want depends on the Dynamic model are you wanting to program.

So ...what model of Dynamic are you wishing to program?
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Re: DWIZ-ADAPT

Postby woodygb » 19 Jun 2021, 13:32

Found a post that mentions your model...

I have an Invacare Orion with a Rhino2 control unit DS90


So you need the option recently made by MXDrew .

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Re: DWIZ-ADAPT

Postby MXDrew » 19 Jun 2021, 16:59

I can confirm that it is easy to make and works well.
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Re: DWIZ-ADAPT

Postby Kaschperlpropper » 22 Jun 2021, 06:33

First of all, thanks for the very good help.
What is the value of the first diode at the top?
Thank you very much...
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Re: DWIZ-ADAPT

Postby woodygb » 22 Jun 2021, 08:17

1N4148

You can leave the diode out if you want .... I put one in as a polarity safety measure.
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Re: DWIZ-ADAPT

Postby Kaschperlpropper » 29 Jun 2021, 16:25

Hello everybody. i have now soldered the board together.
but do not get a connection to the control unit.
In the wizard I see in the status line at the bottom on the right side how
the software queries different ports but no connection is made.
now I have a few more questions ...
1: When I measure the data pin and minus with the oscilloscope,
I get the signals from the control unit which can be seen in the photos. But no signals
From the pc.
2: what should the signals from the laptop look like after the circuit board?
I have the feeling that nothing arrives from the laptop via the circuit board.
I've already swapped tx and rx to see if it works. it doesn't work
3: I measure directly at the rs232 connector pin 3 and minus I see a signal every time the port swapped
i have checked the circuit board several times. everything should be right
4: is it important which usb. rs232 cable i use? actually I should have the right cable because I measure at pin 3 and minus a clean signal which changes as soon as the port is changed by the software.
Thank you very much for your help
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Re: DWIZ-ADAPT

Postby woodygb » 29 Jun 2021, 17:03

You need to use one of these...other types simply do not work.

https://www.amazon.co.uk/gp/product/B0753GY7FR
https://www.amazon.co.uk/gp/product/B079X3SWHV
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Re: DWIZ-ADAPT

Postby woodygb » 29 Jun 2021, 19:23

3: I measure directly at the rs232 connector pin 3 and minus I see a signal every time the port swapped...
4: is it important which usb. rs232 cable i use? actually I should have the right cable because I measure at pin 3 and minus a clean signal which changes as soon as the port is changed by the software.


..Are you trying to use a RS232-USB Cable with a DB9 plug like this? .... If so ,why?.
It isn't shown on the drawing!

Image

The adapter uses TTL level signals.
https://www.sparkfun.com/tutorials/215
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Re: DWIZ-ADAPT

Postby gcebiker » 30 Jun 2021, 08:32

Wouldn't that RS232 cable just replace your Red RS232 to USB board you are using woody ?
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Re: DWIZ-ADAPT

Postby woodygb » 30 Jun 2021, 09:16

gcebiker wrote:Wouldn't that RS232 cable just replace your Red RS232 to USB board you are using woody ?


I will attempt to make it clearer... One uses TTL Signal Logic the other uses RS232 signal logic .

TTL serial & RS232 serial are NOT the same or compatible , their high and low signals are the opposite of each other.

THIS Adapter uses TTL serial logic signals .

This method of serial communication is sometimes referred to as TTL serial (transistor-transistor logic). Serial communication at a TTL level will always remain between the limits of 0V and Vcc, which is often 5V or 3.3V. A logic high ('1') is represented by Vcc, while a logic low ('0') is 0V.



usb ttl serial.jpg


THIS adapter uses RS232 SERIAL logic signals

RS-232 (Recommended Standard 232) telecommunications standard. By the RS-232 standard a logic high ('1') is represented by a negative voltage – anywhere from -3 to -25V – while a logic low ('0') transmits a positive voltage that can be anywhere from +3 to +25V. On most PCs these signals swing from -13 to +13V.


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Re: DWIZ-ADAPT

Postby woodygb » 30 Jun 2021, 11:28

gcebiker wrote:Wouldn't that RS232 cable just replace your Red RS232 to USB board you are using woody ?
The board in the pic IS NOT RS232 it is TTL.

It uses a FT232RL Mini USB to TTL Serial Converter Adapter Module 3.3V 5.5V .
E.G. https://www.amazon.co.uk/gp/product/B0753GY7FR

Revised drawing.

ttl Dynamic adapter.jpg
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Re: DWIZ-ADAPT

Postby MXDrew » 04 Jul 2021, 20:30

woodygb wrote:You need to use one of these...other types simply do not work.

https://www.amazon.co.uk/gp/product/B0753GY7FR
https://www.amazon.co.uk/gp/product/B079X3SWHV



The above boards are the only interface to use. I know as I tried an expensive one I already had and no luck ordered one of the cheap ones and it works every time.
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