KIM1 connection to ESP32

[polperez22]

Hi there,
I'm trying to send data with my KIM1 shield v3 with my ESP32 and I'm having some trouble. I'm using UART module to communicate with the KIM1 but I don't get any response so I'm guessing it's not well communicated.
Does someone know if I should be using a different module for my KIM1 or how can I get to send my data?
Thanks

[scruss]

Please, document/link what you mean as a "KIM1".

To me, it's a very old 6502 cpu trainer made by MOS (then later by Commodore) that uses high voltage (non-TTL) RS-232 serial communication

[polperez22]

My bad sorry. Here you have the link to the oficial product: https://connect.kineis.com/kim1/kim1

[davefes]

Thought I had a good look around their website ... where is a datasheet for this device?

I see it is a 5V device have you got the voltage levels setup correctly to interface to this device with an ESP32?

[davefes]

Is this the device:
https://telemetry.groupcls.com/argos-solutions/argos-products/modems/kim1-interface-board/

[polperez22]

Yes it's that device. On the link I sent you you can have the datasheet and the integration manual.

[polperez22]

Here's the datasheet: https://static.helpjuice.com/helpjuice_production/uploads/upload/image/10644/direct/1658412966976-KINEIS-SP-20-0147%20KIM1%20Datasheet%20v2.0.pdf. You can use this as the differences between both versions are so light.

[davefes]

I expect 100-200 pages for a datasheet. I found a one page datasheet.

[davefes]

Working with arduino ide is simpler bc this device has its own library.

Reading through it.

[davefes]

Do you have it connected to the ESP32 as per Fig 1 in the Integration Manual?

[davefes]

Have you done a loop-back test to verify that the ESP32 UART is working?

[davefes]

Connect TXD and RXD together on the ESP32.

     #  do a loop-back test first

        msg = 'Test'
        ser.write(msg)
        print('message written')

        while True:
            new_msg = ser.read()
            if not  new_msg:
                break

        print(new_msg + '\n')

Back in a few hours.

[davefes]

Looking at the Arduino library line 188 in KIM.cpp should be fairly easy to port to Micropython. Not that I understand the for loops. It looks like you have to send the command multiple times?? sendATCommand will be a bigger porting job.

Good luck!