Huawei EM770W SIM card issues

Hello,

we encountered the following problem with the EM770W: If the SIM card is plugged in after our test system is powered on, it is not recognised in ofono. Even if we restart ofonod after plugging in the SIM card. We use the 2.6.35~rc5 kernel from Meego 1.1 trunk because we encountered problems in the option driver with Kernel 2.6.33.3 (the communication got stuck from time to time). For ofono we use the latest 0.26 and for connman 0.55.

Is this a bug relted to ofono or a limitation of the Huawei hardware?

Regards
Florian Mayer
Mayer Electronics

Hi Florian,

I watch oFono chat with EM770W modem. If I restart ofonod after plugging in the SIM card. We have:

ofonod[7871]: Pcui:< \r\n^SYSINFO:1,0,1,5,255,,4\r\n\r\nOK\r\n ofonod[7871]: Pcui:> AT+CGMI\r
ofonod[7871]: Pcui:< \r\nhuawei\r\n\r\nOK\r\n ofonod[7871]: Pcui:> AT+CGMM\r
ofonod[7871]: Pcui:< \r\nEM770W\r\n\r\nOK\r\n ofonod[7871]: Pcui:> AT+CGMR\r
ofonod[7871]: Pcui:< \r\n11.126.08.01.00\r\n\r\nOK\r\n ofonod[7871]: Pcui:> AT+CGSN\r
ofonod[7871]: Pcui:< \r\n357030020291346\r\n\r\nOK\r\n ofonod[7871]: Pcui:< \r\n^BOOT:20291346,0,0,0,20\r\n

ofonod[7897]: Pcui:< \r\n^RSSI:15\r\n\r\n^SRVST:1\r\n ofonod[7897]: Pcui:< \r\n^MODE:5,4\r\n

However, if I powered on modem with SIM card inserted, I have:

ofonod[7960]: Pcui:> AT+CGSN\r
ofonod[7960]: Pcui:< \r\n357030020291346\r\n\r\nOK\r\n ofonod[7960]: Pcui:< \r\n^RSSI:1\r\n
ofonod[7960]: Pcui:< \r\n^BOOT:20291346,0,0,0,20\r\n ofonod[7960]: Pcui:< \r\n^MODE:3,3\r\n\r\n^SIMST:1\r\n ofonod[7960]: Pcui:> AT+CRSM=176,28590,0,0,1\r
ofonod[7960]: Pcui:< \r\n^SRVST:2\r\n\r\n^MODE:3,3\r\n ofonod[7960]: Pcui:< \r\n+CRSM: 144,0,"03"\r\n\r\nOK\r\n ofonod[7960]: drivers/atmodem/sim.c:at_crsm_read_cb() crsm_read_cb: 90, 00, 1 ofonod[7960]: Pcui:> AT+CPIN?\r
ofonod[7960]: Pcui:< \r\n+CPIN: READY\r\n\r\nOK\r\n
ofonod[7960]: drivers/atmodem/sim.c:at_cpin_cb() crsm_pin_cb: READY

So looks like Huawei modem doesn't send us ^SIMST unsolicited notification in the first case.

Regards,
Zhenhua