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Forum Index : Microcontroller and PC projects : External Networking Option?
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elk1984 Senior Member  Joined: 11/07/2020 Location: United KingdomPosts: 227 |
This is more expensive than the wifi modules I've seen talked about on the forum, but I've just picked up one of these Wimodem units to use with a BBC Master and wondered if it's possible to interface to the CMM2. It has separate power, so the concerns re: overloading the GPIO go away as far as I can tell. I've picked up a DB25 to screw terminal adapter, could this be an option? Take the end off a ribbon, screw into the adapter, off I go? Edited 2021-04-04 00:53 by elk1984 |
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| frnno967 Senior Member Joined: 02/10/2020 Location: United StatesPosts: 104 |
You'll need to either build the RS-232 interface circuit described in the user manual or use a chip like the MAX232 to convert the levels and signaling between TTL and RS-232. Jim's wifi modem is a great device but you can't just hook it up directly. That's why the NodeMCU modules work great, because they're natively TTL signaling and they can be powered from the 5v output of the GPIO and get plenty of power. Jay Crutti: Ham Radio Operator, K5JCJ. Computer Enthusiast. Musician. Engineer. |
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| elk1984 Senior Member Joined: 11/07/2020 Location: United KingdomPosts: 227 |
Thanks, it stays hooked into the Beeb then.  |
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