Dear readers,
as the Enfora GSM 1308 (http://www.testech-elect.com/enfora/) is the standard modem of our Peruvian partner company we will use this item for a telemtry project.
We try to establish the connection following the "CS-GPRS Communications Package" User Guide via Device Configuration Utility software.
* Has anybody any experience if a "Null-Modem-Adapter" is necessary to connect Logger with modem via RS232 port?
* And does anybody know why the CR1000 Logger in the first step of communication send an "A" to the modem whereas our modem would need an "AT"
Thanks for any help!
Please reference this thread already already started
http://www.campbellsci.com/forum/messages.cfm?threadid=0EEE806B-07C3-0D3D-B1FC4391399F8B45
Of note:
"The logger will send AAAAAA etc with any GPRS modem if it does not echo back the first A (which is standard "Hayes" modem dialling protocol). You cannot stop that code except by having a modem that responds as it should.
If the modem is connected correctly to the logger it will not send these strings but simply send the dial command you specify (the first letter of which is normally "A").
Can I suggest you check the wiring between the modem and the logger. You will need some form of null modem cable or interface if connecting to the CS I/O port.
We do have people using modems other than those we supply for GPRS use. If you buy the package from us though it normally works out of the box."
Thanks for your fast reply and helpful information!