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Showing results for tags 'sim900'.
Found 4 results
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Hello Im trying to send sms message by sending AT commands from MSP40F5529 to SIM900 (by Simcom). physical connections: Rx(P3_4) to Tx, Tx(P3_3) to Rx, GND to GND. When I plug the micro-usb cable and turn the serial monitor on ,I can see the commands and messages well. I scoped the signal from the UART pins of the MSP and I saw noting changes (constant 0) - the pins do not react to my code. this is my code (i print int 55 in order to see some changes in the uart pins value ,which didnt happend) : void setup(){ Serial.begin(9600); } void sendsms(){ Serial.println(
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Hello Im trying to send sms message by sending AT commands from MSP40F5529 to SIM900 (by Simcom). physical connections: Rx(P3_4) to Tx, Tx(P3_3) to Rx, GND to GND. I scoped the Rx and Tx pins and they both have constant voltage value of 2.7 (logical 1) When I plug the micro-usb cable and turn the serial monitor on ,I can see the commands and messages well. this is my code (i print int 55 in order to see some changes in the uart pins value ,which didnt happend) : void setup(){ Serial.begin(9600); } void sendsms(){ Serial.println("AT\r"); delay(1000); Serial.prin
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Hello, I am using msp430g2553 mcu and I interfaced that mcu with gsm sim900 successfully. Now I am facing some strange behavior in the code. When I write the loop as follows: void loop() { String buffer = readSIM900A(); String msgOn = buffer; String number1 = "8320389582"; //problem String number2 = "9106555707"; //problem String number3 = "9979933498"; //problem if (buffer.startsWith("\r\n+CMT: ")) { Serial.println(buffer); buffer.remove(0,12); buffer.remove(10); Serial.println(buffer);
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For the AT commands from energia's serial monitor it appears as some characters missing!!! Any solutions? Below is my output: AT+CREG? +CREG: 0,1 OK AT+CREG=? +CREG: (0-2) O AT+CFUN=? +CFUN: (0,1,4),(-) K
