Click here to Skip to main content
15,868,152 members
Please Sign up or sign in to vote.
1.00/5 (1 vote)
Hi:)
I've problem with SIM900 module.
Seems to me that it's not able to maintain a connection.

What i know this firmware is supporting europe (i come from Poland).
SIM has no PIN code and it's properly working on smartphone.
Firmware version:
SIMCOM_Ltd
SIMCOM_SIM900B
Revision:1137B09SIM900B32_ST


Response for "AT" Command:
OK


It's detecting an operator:
AT+COPS?

+COPS: 0,0,"Orange PL"


But signal quality is 0:
AT+CSQ

+CSQ: 0,0

OK


Led status:
https://www.youtube.com/watch?v=AY6JEwgJMM0&feature=share

Any tips what can be wrong?

What I have tried:

I've tried changing firmware on SIM900. Any results.
Posted
Comments
MateoGlowinski 2-Aug-18 3:09am    
I'm powering it from laboratory power supply which is set to 5V DC and current limitation set to 2A.
Richard MacCutchan 2-Aug-18 3:25am    
I think you need to post this in a hardware forum. QA is for programming issues.
MateoGlowinski 2-Aug-18 3:27am    
Right, i will do that:)
Jochen Arndt 2-Aug-18 3:40am    
Check your antenna connection (socket, plug, cable, and antenna).
MateoGlowinski 2-Aug-18 4:01am    
hm... everything seems stable. I tried with two different antennas (smaller and bigger one)

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)



CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900