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192 Threads found on Gsm And Sim
hai, I am using stm32f0xx microcontroller by using neoway n10 gsm module i can send and receiving the sms . I dont know how to connect GPRS to my microcontroller through neoway n10 gsm module of AT commands .. Please tell my how to write a AT commands for neoway n10 gsm (...)
M95 Quectel gsm need fast response and higher baudrate for communication so try to your delay between you successive AT commands and after ctl+z (0x1a) wait for a few ms. and basic thing check your network and sim balance to send a sms properly.
HI all, I am working on a project where i have to interface gsm 800 for sending and receiving messages which works on 5v. i am searching for the gsm Module with my specification, but its not available in the market. so planning to design my own. my specification is to only send any receive messages using TTL ouptuts, and (...)
Do some basic check that your gsm is working and receiving the sms properly.Test and checked with single msg send command from PC and controller.Lcd is working fine try display simple text and initialization all working good. Then you can switch over the receive the (...)
hi, I am using sim 900 module..I can get date and time by setting once device resets,RTC also gets reset.can we get date and time without using RTC i.e by gsm or GRRS: :cry: - - - Updated - - - plz help me
Hi. I found at my workplace an evaluation board based on gsm module sim508 EVB V1.01, manufactured by simCom What seems to be the problem: I have inserted a valid sim card; soon after I activate gsm (by pressing Z1 button ) the gsm_NET led start blinking and then (...)
hello i am balvendra choudhary i made a gsm based project in which i used atmega32 A and gsm sim900. in which response of AT command is OK. when i calling it shows RING on display. during calling the status would be three but its not what is the problem. same code is working with sim300 (...)
After 2days of works with this issue, I found that the GPS works fine. Even MCU can read the data very fine. But the problem is whenever I'm trying to use the gsm part to send that data via SMS, it can not read the GPS data. It reads it as a noise or blank space. Then what may be the solution of this issue? Should I keep a time gap between readin
Hello,i need to maintain gsm signal for the longest time possible,possibly two years straight or so. To do that i am looking for a chip that can fit a gsm sim card or micro sim and it should be callable when i call the number,but of course no one will answer since its a sim card on a (...)
Have you solved this? I'm asking because I have the same problem. My suspicion is the gsm operator blocks inbound TCP connections. But a friend of mine is using a PC with an USB gsm modem configured as a SERVER. and it works! Will try to borrow his sim card to do some tests.
Hello, I have developed a modem application using sim900 modules. The problem is that now i am trying to use 4G LTE sim card and i have not accomplished network registration. If i use a gsm/GPRS sim card it works. What it could be? Thanks for your attention. Ricardo
i am working on my project that switches off and ON home appliances using an android app that creats sms .The app can also request for power being drawn by the appliances through sending texts request that can be red by a gsm module. My gsm module is linked to a pic 18f4550 and my gsm (...)
Hi, im new to the modem world and am currently working on an arduino project that involves a gsm modem. The issue is that i have yet to connect to the t-mobile network that my sim card is for. I have a MTCBA-F-F4. creg?: 0,2, csq: 99,99 (4g coverage in my area). should i be manually selecting the network? should i be setting the Frequency? I (...)
My module is responding for all the at command and sim is registered but i could not able to call and receive the call. what might be the issue? :sad::sad::sad:
Hi All, I am having a sim900 module. I was trying to communicate it with and display the response in LCD. But somehow I was having some issues of getting LCD working all the time. In the mean time I connected the USB of the
I am using Arduino Mega 2560 for a project which requires gsm sim Modules and i am using sim 900A. While trying to call or message , arduino is working that is code is running even the serial monitor displays the working code but there is no call or message. please help117720117721
sim900 it is a gsm module for 800/900/1800/1900 MHz bands, so it will not work on other frequencies. gsm its a half-duplex TDMA system, with RX and TX on different frequencies and times. To boost both signals designing the amplifiers to meets all the gsm network (...)
gsm modems running a TCP/IP stack are usually behind a NAT (Network Address Translation) box so it is generally not possible to conect to a server running on a modem from the external internet
I got two modems (dev boards) Siemens TC35 and sim900A and I cannot get them to send sms. From the research (AT response) it seems that somehow sim cards will not register to network. I bought three sim cards from different networks currently operating in my location. Commands to (...)
I have write a code for sending message form gsm300 using 8051. but it is not working. plz tell me where is the problem? in the program or in ckt? #include #include #include #include #include void delay(unsigned int i); void tx0(unsigned char); void SMSString(unsigned char*text)