I have an SL8090 attached to the SL series development kit. The modem has been inserted and the onboard switches are set as specified in “AirPrime_SL_Series_Mechanical_Socket_Development_Kit_Quick_Start_Guide_Rev3_0.pdf”. I’m hoping to use this modem to replace our aging WISMO228 design and bring 3G capability to our telemetry.
I’ve been connecting to the SL8090 via the development board UART and I’m having some problems (they seem to exist via USB as well).
I can’t get the modem to echo characters sent to it. I’ve sent ATE1 which the modem acknowledges but then doesn’t act on. I’ve tried an AT&W to save the configuration followed by a reset to no effect.
The modem interface seems to go into some kind of sleep mode after a couple of seconds. When this happens an has to be sent before an AT command is registered. I’ve check the modem isn’t set for auto baud detection just incase this was the cause. Is there a way to stop this?
The modem returns an error when I try an enable AT+CFUN=1. There’s a SIM card attached and AT+CPIN returns “Ready”. AT+CSQ returns 99,99 which would indicate no signal although there clearly is when I survey the site with my phone.
I hope someone can help, it’s driving me nuts I can’t get past the basics to start experimenting with the PAD commands!