Comms Link and Bluetooth

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olivierg
Posts: 36
Joined: Sat Jan 02, 2021 3:53 pm

Re: Comms Link and Bluetooth

Post by olivierg »

The case is degigned:
IMG_20210221_084503.jpg
The top of the box remains to be drawn.
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

It looks beautiful.
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

olivierg wrote: Wed Feb 17, 2021 11:06 pm Hello,

Today i have tested solution:
The transfert with PSI2WIN works.

How to:
1) Cut the +5V power from PSION in comms-link DB. (You can place schottky diode between connector and PCB).
2) Connect the 5V from PCB to 5V on Bluetooth adapter. (USB).
3) Connect RX,TX and GND to DB connector.
4) set the 9600 8N1 and no protocol
5) Launch term in PSION and test connection (Type AT -> Response OK)
6) Connect to Windows.
6a) For check, launch terminal software on windows (like Coolterm), type any char on booth device.
7) Quit terminal on booth device, and change the protocol in comm's link in PSION
8) Launch PSI2WIN with correct com port and start.

Now you can recieve and send file using comm's link menu.
I have tested with OPL and blocnote file.

With this modification of comm's link, normaly any software works.
The initial problem is the loss of signal states when no communication program is running on the PSION, the software in the comm's link ROM is programmed to shut down the comm's link hardware to save the battery.

Thanks
Olivier
Good evening Olivier. I have tried to do what you describe here. I cannot type at Term of Psion's II. When I launch Psi2Win and choose the correct com port, the red light on the bluetooth module stops blinking quickly. That means that there is a connection with the PC's bluetooth. I set up the protocol to "PSION" and try to send a file from Psion II to PC . But nothing happened.
I use HC-06 module.
Did you use only the JDY-31 module, or you have had successful communication with other modules too?
olivierg
Posts: 36
Joined: Sat Jan 02, 2021 3:53 pm

Re: Comms Link and Bluetooth

Post by olivierg »

I did the test with a BC-04. (the RS232 interface you mentioned on eBay).
If you don't have an answer in the Term psion before making the BT connection, it's not good.
Check connnection. With term 9600 8N1 protocol None.
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

olivierg wrote: Wed Feb 17, 2021 11:06 pm Hello,

Today i have tested solution:
The transfert with PSI2WIN works.

How to:
1) Cut the +5V power from PSION in comms-link DB. (You can place schottky diode between connector and PCB).
2) Connect the 5V from PCB to 5V on Bluetooth adapter. (USB).
3) Connect RX,TX and GND to DB connector.
4) set the 9600 8N1 and no protocol
5) Launch term in PSION and test connection (Type AT -> Response OK)
6) Connect to Windows.
6a) For check, launch terminal software on windows (like Coolterm), type any char on booth device.
7) Quit terminal on booth device, and change the protocol in comm's link in PSION
8) Launch PSI2WIN with correct com port and start.

Now you can recieve and send file using comm's link menu.
I have tested with OPL and blocnote file.

With this modification of comm's link, normaly any software works.
The initial problem is the loss of signal states when no communication program is running on the PSION, the software in the comm's link ROM is programmed to shut down the comm's link hardware to save the battery.

Thanks
Olivier
Good morning Olivier.
Could you please post a photo (or some photos)
that we can see the connection of the successful transmition.
I can't have a successful test connection (Type AT -> Response OK) using Psion's "Term" and I want to see what I do wrong.
Best regards.
Nick.
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

This is the connection I do.
Attachments
DSC_0407.JPG
DSC_0406.JPG
DSC_0404.JPG
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

And another one photo of the connection.
Attachments
DSC_0408.JPG
olivierg
Posts: 36
Joined: Sat Jan 02, 2021 3:53 pm

Re: Comms Link and Bluetooth

Post by olivierg »

Hi Nick,

It's not good. You connect the RS232 signal (+ 12V / -12V) to a 3v3 / 0V input. You have to make the connection on the DB 9 connector. Like This:
IMG_20210224_091036.jpg
Cut power pin on CL:
IMG_20210224_091740.jpg
Pickup +5V and connect to CL: (Do not pay attention to the 3 wires (Brown, Orange and black), that was another test).
IMG_20210224_091758.jpg

Bye
Olivier
NickKostelidis
Posts: 101
Joined: Wed Jan 27, 2021 8:23 am
Location: Athens - Greece
Contact:

Re: Comms Link and Bluetooth

Post by NickKostelidis »

olivierg wrote: Wed Feb 24, 2021 9:35 am Hi Nick,

It's not good. You connect the RS232 signal (+ 12V / -12V) to a 3v3 / 0V input. You have to make the connection on the DB 9 connector. Like This:
IMG_20210224_091036.jpg

Cut power pin on CL:
IMG_20210224_091740.jpg

Pickup +5V and connect to CL: (Do not pay attention to the 3 wires (Brown, Orange and black), that was another test).
IMG_20210224_091758.jpg


Bye
Olivier
Thank you Olivier.
I have a few questions.
1. If we want to use another module like JDY 31 or HC-05,   we have to use the  standard pins they have on board?
2. In this case is it ok to use a 3.7V battery or we must find a 5V battery?
I ask this because the 14500 battery you are going to use is max 4.2V.
3. Why is it absolutely necessary to cut the power pin on CL?
Isn't enough to supply CL with power from the battery?
Attachments
JDY-31.jpg
olivierg
Posts: 36
Joined: Sat Jan 02, 2021 3:53 pm

Re: Comms Link and Bluetooth

Post by olivierg »

1) Yes, but without the adapter that you used as an example.
2) No, in schematic 2 chips: 1 for charging battery and another for convert 3.7v to 5V (DC-DC).
3) Because you can not send 5V from USB to PSION, not good idea.
And you did not understand yet, that the CL is not permanently powered. If you exit the term menu for example it is off and you lose the connection with the BT module.

You don't have to worry about the battery and the module, they will be included and soldered in the version I am developing.
Unless you do it yourself, but it takes some knowledge of electronics and it will be wonky.
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