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Recent content by Batang

  1. Batang

    sim900 gets restarts every time

    Make sure the strip line and antenna is 50 ohms. A good free tool for strip line calculations is Agilent Technologies AppCAD (now owned by Avago Technologies), download link: Cheers
  2. Batang

    SIM800L network registration problem?

    The reset pin is an emitter follower output. hard strapping it to vcc would have no affect. Cheers
  3. Batang

    How to use Simcom SIM900 Modem and GPRS...

    Rest in peace SIM908!
  4. Batang

    Sensor Issue in Sim 900

    Sounds like you need some RF bypassing on your sensor inputs. You can also try moving the GSM antenna away from your sensor. Cheers.
  5. Batang

    SIM900, STM32F1xx keil project

    I assume that you have already tried to do this yourself and are having problems. Perhaps you should post what you have done already so you can get some advise. Cheers.
  6. Batang

    SIM 900 ON/OFF issue

    Perhaps you should post your circuit as the amount of information you have given so far does not even allow for a guess. Cheers.
  7. Batang

    Is it possible to connect a SIM900 to a remote computer by GPRS?

    The HW Hercules Software software is Freeware and you can get it from the the link: https://www.hw-group.com/products/hercules/index_en.html Cheers.
  8. Batang

    Is it possible to connect a SIM900 to a remote computer by GPRS?

    You will need to write a program that can read data from either a TCP or UDP connection to the computer. If you are using DotNet this is rather simple to do. Also keep in mind that the computer firewall will need the port you are using opened and if the computer is behind a router then you...
  9. Batang

    Is it possible to connect a SIM900 to a remote computer by GPRS?

    Yes you can, but the computer must have either a fixed IP address or a DNS referer. Cheers.
  10. Batang

    [SOLVED] SIM 900 pcb design: "keepout areas under the module"

    Here is an example for the PCB keepout from on of my boards. Cheers
  11. Batang

    [SOLVED] SIM 900 pcb design: "keepout areas under the module"

    DO NOT have any PCB tracks or fills in those areas, follow the SIM900 hardware document for the keep out area sizes. Cheers
  12. Batang

    [SOLVED] Sim900 sms problem; the AT Commands seen in the received SMS

    DO NOT have any PCB tracks or fills in those areas, follow the SIM900 hardware document for the keep out area sizes. Cheers
  13. Batang

    Cannot start SIM900a by software ? Is that the P, DT or DR pin

    In your diagram the SIM900 is powered from 5 volts, this is wrong as the maximum supply voltage for the SIM900 is 4.8 volts. The SIM900 WILL NOT start if the maximum supply voltage is exceeded. With the SIM900 supplied by the correct voltage and the power supply can provide adequate current (2...
  14. Batang

    Using 18f452 send/ receive sms to GSM A900 , mikroC

    @ aviraje8 The only way anyone could help you is if you post your code and circuit. Otherwise your request for help as posted is the same as asking "How long is piece of string". Cheers.
  15. Batang

    current calculation problem in a project

    Use a multimeter. Cheers.

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