RS232 technical question

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irritantno9
 
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RS232 technical question

Post by irritantno9 »

I'm planning on hooking xbee adapter board to a device that has on-board RS232 output.
I was wondering if there is any way to eliminate the requisite max232 or equivalent intermediary that I believe I need to safely communicate with my device.

Currently the Adafruit Xbee adapter has a 3.3V - 5V buffer chip. I won't be talking to the Xbee with 5V ttl.

I'm just wondering if there is a way to bypass the buffer chip and add the max232 chip to the xbee adapter board to reduce parts count.

anyone care to set me right?

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Re: RS232 technical question

Post by adafruit »

a max232 is absolutely required

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opossum
 
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Re: RS232 technical question

Post by opossum »

Use a 3.3V RS-232 transceiver like the MAX3232 to elimiate the need for the buffer chip.

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irritantno9
 
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Re: RS232 technical question

Post by irritantno9 »

I guess I worded that poorly.

could I substitute the buffer chip on the xbee adapter with the max232?

It seems like too many intermediaries between the xbee and the rs232 equipment.

for testing i'm just clamping a DIP test probe onto the max232 on the unit and pulling the ttl signals off it.

The end product will have to support true rs232 though.

any pointers on transmogrifying the xbee adapter boards to accept the max232?

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