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Recent content by Ichan

  1. I

    GPS Tracker using SIM908

    Hi Echo Wang, Nice to get in touch with Simcom expert, I just sent you a private message for further discussion. Thx, Ichan.
  2. I

    GPS Tracker using SIM908

    Hi Echo Wang, thanks for your respond. The problem solved, my bad to miss interpret the output of AT+CGPSINF=0 command - here is my answer of my own similar question on other forum https://www.sonsivri.to/forum/index.php?topic=44973 The AT+CGMR command give me Revision:1137B03SIM908M64_ST, is...
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    GPS Tracker using SIM908

    Hi Echo wang, Looks like you know much about SIM908. I am struggling for several days now where the gps coordinate given by my SIM908 very much not accurate, it shows my home missed about 20km on google maps! What could be the cause? I use 3-5V ceramic patch antenna with GPS-VANT-IN pin...
  4. I

    What's the best way to get 3.3V from a 5V circuitry?

    How about using 3.3v for whole circuit? -ichan
  5. I

    SIM900 Customer Flash Loader

    Chipseller, you are very helpful - thank you. Thedinuka, nice to know someone with the same interest - my applications mostly about remote sensing. -Ichan
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    SIM900 Customer Flash Loader

    Thanks a lot Chipseller. i will try it soon as i got my SIM900. I am successfully build the sample project of embedded AT with DevIDE that you give, but the CoreSW version is 1137B01V02SIM900M64_ST_EAT - with the B01 in it I think it is an old one, do you have a newer version? -ichan
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    SIM900 Customer Flash Loader

    Well the truth is I don't have it yet, I use many sim300d and in the near future I will need to use sim900d with MMS. As the mms thing is newly available (?) then I am afraid if i buy some sim900 locally it will be with the non mms firmware. Anyone experienced with embedded AT of sim900? That...
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    SIM900 Customer Flash Loader

    Hi chipseller, Would you please upload latest sim900 firmware with MMS support? What is the difference between M64 and M32 firmware? Thanks a lot in advance. -ichan
  9. I

    Pcb Assembly cost in Asia

    Hi Miskol, From the links that you gave I can guess where you come from, then best regards from the neighbor. I am actually setting up this kind of service and need to know the market prices, please have a visit: **broken link removed** There is cost calculator for pcb assembly, it is not...
  10. I

    Pcb Assembly cost in Asia

    Thank you very much for the link good to know it, but i am looking for pcb Assembly not the pcb itself. -ichan
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    Pcb Assembly cost in Asia

    Hi, I am looking for information about low to medium volume Pcb assembly cost in Asia where the components mostly SMD. Considered low volume if the board qty < 1000, and medium volume if the board qty is above 1000 and up to 10000. Searching the web didn't give enough clue, hoping someone with...
  12. I

    which to choose? sim com or quectel gsm module?

    Using mother language in a global forum considered as a bad manner! Translation: Just use sim com, i dont understand either... anyway. Simcom is a lot more famous then quectel, means it's been used and proved by many people around the world. But Quectel (M10 for example) has one big wining...
  13. I

    Pic !8f4550 I want to blink some led

    From your picture, the code is written for Hi-Tech PICC18 compiler but the compiler used is Mplab C18. You use wrong language toolsuit. -ichan
  14. I

    PIC16F628A not working for LED blinking

    I was including a wrong proteus file, here is the right one. -ichan
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    PIC16F628A not working for LED blinking

    Here it is, mplab project + proteus dsn. No need to sorry... :) -ichan
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