Aug 20, 2012 #1 D ddmukundan Newbie level 3 Joined Aug 17, 2012 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,305 i have aproblem on interfacing GSM module with my dsPIC 30f4013. when i send AT command the it is responding back with the same command i am not getting the response i am sending like this UART_TX[''A'']; UART_TX[''T'']; UART_TX[0X0D]; AFTER THAT I AM WAITING FOR RESPONSE I AM GETTING AT|| ON MY lcd PLS ANY ONE KNOW THIS ISSUE PLS HELP ME
i have aproblem on interfacing GSM module with my dsPIC 30f4013. when i send AT command the it is responding back with the same command i am not getting the response i am sending like this UART_TX[''A'']; UART_TX[''T'']; UART_TX[0X0D]; AFTER THAT I AM WAITING FOR RESPONSE I AM GETTING AT|| ON MY lcd PLS ANY ONE KNOW THIS ISSUE PLS HELP ME
Aug 20, 2012 #2 D DineshSL Advanced Member level 1 Joined May 10, 2010 Messages 403 Helped 121 Reputation 242 Reaction score 116 Trophy points 1,343 Location Sri Lanka Activity points 3,551 If your wiring is ok; Can you try with 0x0A as terminating character instead of 0x0D ? If didn't work try with both of characters at end.
If your wiring is ok; Can you try with 0x0A as terminating character instead of 0x0D ? If didn't work try with both of characters at end.
Aug 20, 2012 #3 E electronicsbasecom Banned Joined Feb 20, 2012 Messages 111 Helped 23 Reputation 46 Reaction score 21 Trophy points 1,298 Activity points 0 Hello, Did you try to communicate with modem without uC, for example with PC. Did u check baudrate? For more shematic is needed.
Hello, Did you try to communicate with modem without uC, for example with PC. Did u check baudrate? For more shematic is needed.
Aug 20, 2012 #4 D ddmukundan Newbie level 3 Joined Aug 17, 2012 Messages 3 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,305 DineshSL said: If your wiring is ok; Can you try with 0x0A as terminating character instead of 0x0D ? If didn't work try with both of characters at end. Click to expand... i connected UART TX to modem RX modem TX to UART RX i tried with AT<CR><LR> also i tried AT<CR> for all these 2 i am getting the echo back. i dont think that if wiring is not ok i wont even get echo back. am i right? - - - Updated - - - electronicsbasecom said: Hello, Did you try to communicate with modem without uC, for example with PC. Did u check baudrate? For more shematic is needed. Click to expand... yes i try to communicate with PC hyperterminal and mikroc UART terminal in both i am getting the correct response. only when i sending using uc i am not getting the response i set the baud rate at 9600 . when i am connecting the uc with pc i am able to transmitt and receive as well
DineshSL said: If your wiring is ok; Can you try with 0x0A as terminating character instead of 0x0D ? If didn't work try with both of characters at end. Click to expand... i connected UART TX to modem RX modem TX to UART RX i tried with AT<CR><LR> also i tried AT<CR> for all these 2 i am getting the echo back. i dont think that if wiring is not ok i wont even get echo back. am i right? - - - Updated - - - electronicsbasecom said: Hello, Did you try to communicate with modem without uC, for example with PC. Did u check baudrate? For more shematic is needed. Click to expand... yes i try to communicate with PC hyperterminal and mikroc UART terminal in both i am getting the correct response. only when i sending using uc i am not getting the response i set the baud rate at 9600 . when i am connecting the uc with pc i am able to transmitt and receive as well
Aug 20, 2012 #5 E electronicsbasecom Banned Joined Feb 20, 2012 Messages 111 Helped 23 Reputation 46 Reaction score 21 Trophy points 1,298 Activity points 0 Than give us your schematic first rather than code.
Mar 31, 2014 #6 D dubey Newbie level 1 Joined Mar 7, 2013 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,285 hello, i have the same problem, that i am getting Eco back my same command that i am sending to sim 900a. i am using mega 16 uc. i have checked all my hardware connection several times they are all correct. can any one have solution??
hello, i have the same problem, that i am getting Eco back my same command that i am sending to sim 900a. i am using mega 16 uc. i have checked all my hardware connection several times they are all correct. can any one have solution??