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2
votes
1answer
295 views

What is the best way to receive unsolicited response from GSM SIM900 in PIC18

I am using PIC18F2520 and trying to communicate with GSM SIM900. I am using UART interrupt to receive data from the GSM. I am ...
0
votes
2answers
296 views

Unable to receive response from SIM900

I am trying to communicate to SIM900 with PIC18F2520. I am able to send AT commands using UART but I also want to receive its ...
1
vote
1answer
208 views

How to wait for '>' in SIM900 message format

Hello all I am trying to send sms using SIM900 and PIC18F2520. I have button attached to pin of MCU. So whenever the button is ...
1
vote
0answers
384 views

Error sending SMS to SIM900 in PIC

I am trying to interface SIM900 with PIC18F2520. I need to send SMS to a particular cell number. According to AT commands, ...
1
vote
3answers
4k views

How to simplify UART interrupt handlers on Tiva TM4C with SIMcom 900

UARTIntHandler0 interfaces to the USB UART for debugging. UARTIntHandler1 interfaces to the SIM900 GSM module. The purpose of ...
1
vote
3answers
2k views

Connecting SIM900 to STM32F4 Nucleo

I'm trying to connect Simcom SIM900 to Nucleo-F411RE using the following configuration for USART1: ...
5
votes
1answer
1k views

Error interfacing GSM sim900 with atmega32 [closed]

Hi all I am trying to interface GSM SIM900 with atmega32. I have a written a code in which if a user press a push button, a call will be made to a pre defined number. If we want to change the pre ...
1
vote
1answer
206 views

Error getting data from GSM SIM900

I am interfacing with GSM SIM900. I wrote a program so that I can read the SMS in SIM900. I have made a function to transmit and receive. Whenever msg comes, GSM responds with ...
0
votes
1answer
682 views

Error communicating with GSM SIM900 with AVR.?

I am trying to interface GSM SIM900 with AVR Controller. Till now I have done programming which transmit the command ATD and it makes a call to my cell. GSM response to this command by sending OK. I ...
0
votes
3answers
2k views

SIM908 GPS STATUS “Location Unknown” Error

I'm using a SIM908 module on a custom board and am having trouble getting the GPS location from it. Everything else works on the module. I can send SMS, make calls and send and receive data from a ...