Jul 8, 2012 #1 B BALAJI RAMASAMY Newbie level 1 Joined Jul 8, 2012 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,285 Hi I need an help,that how to interface GSM(sim 300), with pic 16f877a.I have source code but i need an idea in hardware part.
Hi I need an help,that how to interface GSM(sim 300), with pic 16f877a.I have source code but i need an idea in hardware part.
Jul 8, 2012 #2 A arbabar Member level 2 Joined Aug 11, 2011 Messages 46 Helped 5 Reputation 10 Reaction score 5 Trophy points 1,288 Location Islamabad Activity points 1,640 BALAJI RAMASAMY said: Hi I need an help,that how to interface GSM(sim 300), with pic 16f877a.I have source code but i need an idea in hardware part. Click to expand... you can connect GSM modem with pic16f877 by using serial communication (rs-232) protocol. you need to convert TTL to pc-level voltage for that purpose you need max-232 level conversion Ic. Db-9 can b use as connector on both side. main componet 1- pic16f877. 2-max-232 voltage level conversion.(see data sheet for max-232 basic working circuit) 3-db-9connector the tx pin of the controller input to max-232 and then its output will go to the rx pin of the gsm modem using db-9 connector. similarly the rx pin of the controller will connect to the tx of gsm modem via Max 232 using db-9 connector. db-9 pin 5 is gound. db-9 pin 2 is recieve. db-9 pin 3 is transimit. see data sheet of db-9 thankx arbabar
BALAJI RAMASAMY said: Hi I need an help,that how to interface GSM(sim 300), with pic 16f877a.I have source code but i need an idea in hardware part. Click to expand... you can connect GSM modem with pic16f877 by using serial communication (rs-232) protocol. you need to convert TTL to pc-level voltage for that purpose you need max-232 level conversion Ic. Db-9 can b use as connector on both side. main componet 1- pic16f877. 2-max-232 voltage level conversion.(see data sheet for max-232 basic working circuit) 3-db-9connector the tx pin of the controller input to max-232 and then its output will go to the rx pin of the gsm modem using db-9 connector. similarly the rx pin of the controller will connect to the tx of gsm modem via Max 232 using db-9 connector. db-9 pin 5 is gound. db-9 pin 2 is recieve. db-9 pin 3 is transimit. see data sheet of db-9 thankx arbabar