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Arduino Connection


New Member
Thread starter #1
How's the pin connection between arduino and GSMSim900D? and view the activity using hyperterminal? thanks:)


Active Member
simple connect RXD of the arduino to the RXD of the GSM 900 and the TXD to the TXD of the thing.
if there is a level converter, like max 232 on the module, use a level converter (max 232) with the arduino too.. if it works in TTL logic, its okay.


New Member
Thread starter #3
i connect the rx-tx of arduino to the, tx-rx of RS232 to ttl converter. just want to test At-commands
how i am gonna connect the GSM? tnx
Last edited:

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