Questions tagged [sim900]

GSM/GPRS module from the manufacturer SIMCom

8 questions with no upvoted or accepted answers
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SIM900 questions

I am trying to use this RPi addon http://imall.itead.cc/raspberry-pi-gsm-add-on.html connected to an RPi running raspbian to send data from a temp sensor to a http service. For this I use pppd to ...
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0answers
49 views

SIM800L microphone problem

I want to feed SIM800L a microphone signal. I found this page in the datasheet and it worked but I need more a sensitive microphone. I want to hear voices in room as much as possible, like a spy bug. ...
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Cannot send SMS with SIM900 GSM module

I have a little problem using GSM SIM900 module connected to the Arduino the call is working alright but it doesn't send me SMS I don't know why. This is my code: ...
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0answers
404 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, ...
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0answers
39 views

sim900a not responding?

I'm using the sim900A module to try interface with mega 2560 controller using serial1 send SMS to my mobile but it will respond nothing, below I have attached a picture of the gsm module and code ...
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0answers
42 views

SD card sharing between atmega2560 and sim800

I am designing a data logging system that uploads its data via 2G, and downloads new firmware from a server to the SD card, which the mcu boots from. So far, I have achieved Over The air update by ...
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1answer
22 views

send data to server using GET method and sim900a

I am trying to send my data to HTTP server using GET method. When i am sending some hardcoded data manually it is getting stored in database successfully. ...
0
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0answers
235 views

SIM808 Constantly send unwanted message

I have set the baud rate of sim808 module to 57600 and with a USB2TTL module connect it to my PC. Everything works fine and the module recognize the AT-Command except that constantly send the ...