Sim Reader Connection Problem

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riscphree
 
Posts: 7
Joined: Mon Jun 02, 2008 12:53 am

Sim Reader Connection Problem

Post by riscphree »

I saw there was another post with someone having the same problem. The error is:

Traceback (most recent call last):
File "pySimReader.py", line 267, in buttonConnectReader
File "pySIMserial.pyc", line 111, in connectReader
File "pySIMserial.pyc", line 158, in openSession
TypeError: ord() expected a character, but string of length 0 found

I'm going to assume the problem is with my soldering since I didn't do a very good job at all. But here is a top and bottom picture of the kit.



top
bottom

grenhac
 
Posts: 7
Joined: Sat Sep 13, 2008 4:47 pm

Post by grenhac »

I think the soldering looks okay.

It looks like some of the resistors have different values than those listed in the parts list. I've left out the gold band from the colour codes.
  • R1 - Should be a 1M (Brown Black Green) you have 1.5k (Brown Green Red)
    R2 - Should be 1.0K (Brown Black Red) you have 1.5k (Brown Green Red)
    R3, R4, R5 and R6 - Correct 10K
    R7 and R8 - Should be 1.0K (Brown Black Red) you have 1.5k (Brown Green Red)
Not sure if any of this was deliberate hacking but these deviations from the kit are likely to have a negative affect, especially R1 that has a much smaller resistance than specified.

I suggest replacing the resistors with correct values and trying again. I'm not sure if any damage will have been caused to the other components. Someone with a better understanding of the circuit may be able to advise.

adafruit
 
Posts: 12151
Joined: Thu Apr 06, 2006 4:21 pm

Post by adafruit »

ya R1 will definately make it not work!

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