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Hi, I have got some PIR sensors (RE200B) with BISS0001 PIR ICs. I have build the circuit as per the datasheet of BISS0001 IC. I am facing a weird problem on my breadboard where I have made this circuit which is that this circuit is very moody. It works fine sometimes, i.e. only triggers as...
I have the PC connected parallel to PIN2 of modem (MODEM TX). Nothing comes out with regards the new message. My code is slightly different, it does not wait for +CMTI.
After certain number of seconds it repeats the CMGR command to see if any new message is there.
I am having a very strange problem with my SIM300 modem. It takes 1-2 messages and then stops responding. I mean there is no indication of new messages from the MODEM. So my PIC sends AT+CMGR=1,1 and module keeps replying with OK.
Only first 1-2 messages go through after that have to restart...
If anyone is watching this thread, please respond..........
I got my modem today. A very strange problem I am facing:
After this:
at+cipstart="TCP","72.14.215.99","80"
OK
CONNECT OK
at+cipsend
> GET Preferences HTTP/1.1^m^j^m^j^z
----------------
I get CLOSED & the modem stops responding...
Having a similar problem, MODEM connects, CIPSEND gives > (I input data here) get a reply CLOSED and modem Hangs. Searched the forum with sim300 hangs and other terms but no relevant results. Can someone help why this is happening? Thanks in advance
Is this circuit better than using MAX232? Is there any other solution as well? My pcb has less space and max232 fits perfectly.
Nandhu thanks for the reply as well, I tried that already. but :(
Hi, I am having problems interfacing my sim300 Modem (NOT module) to my 16F877A. I am using max232 level converter. When I connect my modem to PC serial port, it works fine.
Also when I connect my PIC to my PC via Max232, it works fine as well.
But I dont get any reply from my modem when I...
Hi
I am newbie and need some help from experts here. I have an sim300z module. I have got the power supply arranged for it. I need help in attaching an MIC to the MICIP & MICIN. I have read te datasheet but I dont know what is "difference circuit" and also if the RI pin goes low for longer (I...
Hi thanks for the effort but this is not what I am looking for. I already have made a working system. Just confused about if I should buy a sim 300 module or modem?
Does module comes with sim card holder or is put seperately? and also is it easy to connect a PIC (via max232) to the module or...
Hello everyone
Can someone tell me please where can I get best priced GSM/GPRS Sim300 modem (RS232) & a well priced GPS receiver in INDIA.
I am trying to put together a tracking system.
Many thanks
moc3021
Hello everyone
I am new to this forum and need help in doing a fan/light dimmer project. Problem is that I dont have a clue of where to begin. I have searched the net to find schematics to connect the above three, nothing is satisfactory. So reading posts in this forum it looks like...
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