MrYu New Member Jan 24, 2013 #1 How's the pin connection between arduino and GSMSim900D? and view the activity using hyperterminal? thanks
How's the pin connection between arduino and GSMSim900D? and view the activity using hyperterminal? thanks
magvitron Active Member Jan 24, 2013 #2 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.
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.
MrYu New Member Jan 25, 2013 #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: Jan 25, 2013
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
magvitron Active Member Jan 25, 2013 #5 just sent some arbitary sms. like "AT+CMGRS... " refer documentation.