how to connect pic 16f84a to the gsm modem kit(sim900d)

[dark_ages]

hi,

jst wanna ask what should i do and use to connect the gsm modem kit(sim900d) to the pic16f84a?


Godbless us all!

 

[Takeshi-san]

I guess you need some wires, soldering iron, some luck and don't forget to read datasheet

 

[dark_ages]

thanks for the tip but i guess what you have posted is just a matter of presence of mind.

 

[Takeshi-san]

keyword was datasheet

 

[DineshSL]

Hi dark_ages,

I think your gsm modem kit(sim900d) communicates via RS232-serial. Is it ?
If so, to communicate with a uC; uC should have USART module.

Your uC pic16f84a doesn't have a Hardware-USART; so you may write a software-USART (or use a software-library which most languages have).

No-hassle way for Serial communication is to use Hardware-USART at both ends. You can use pic16F628A which has USART and most of the features in pic16f84a.

Wish you success !

 

[dark_ages]

we're now using pic16f877a, do you know some assembly codes for accessing/controlling the sim900?...just for example in filtering the text message that is received by the GSM or replying using the pic to the text received by the GSM.....tnx

 

[DineshSL]

Hi,

You may find it in this forum (and use search engine);
Wish you luck,

 

[seadolphine2000]

https://www.edaboard.com/threads/198403/#top

Why did you post the same topic twice?!!!!

 

[zula]

why you are looking for assembly codes? is it mandotary?
you can find uart codes to search google. just write these sentence in the google box 'uart communication with 16f877a'.

https://ww1.microchip.com/downloads/en/AppNotes/00774a.pdf
wish you work

 

[MODCHIP]

i hope help you
**broken link removed**

it exactly what you need step by step to work with this sim900d

 

[dark_ages]

i've got the sim900_hd_v1.02.pdf file...now my problem is how to access the activity of GSM modem using the pic16f877a.
any help plz...

tnx for the advice....

 

[zula]

i think you can not do that!

 

[MODCHIP]

i think you will do it with using the ASM programmation

 

[dark_ages]

we're using the mplab ide software to program the pic, but we dont know what we're going to code, what declarations should we make.
is it possible to use AT commands in assembly?
ex. AT+CMGS

 

[homermike]

hey DARK_AGES...contact me if u want ur project to run... im from Cebu Philippines... you can view in youtube my vidz rgrding gsm modules interfacing to PIC using C langauge... just search "homermike" sa youtube...