engr.waqas
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Hi
I'm using sim908-C and have designed the hardware as described in its hardware design document. My issue is i'm not getting any voltage on SIM VDD and sim908-C is unable to find network i.e. relevant LED blink rate does not decrease.
When I power up the module I see some mV on SIM VDD for very short time then it reduces to 0V.
Please suggest what should I do?
Just for your information !
-I'm powering sim908-C directly from a lead acid 4V battery which can provide 2A burst
-I have tried 100nF and also 200nF capacitor on sim vdd
-100 uF capacitor is placed on sim908-C vdd (very close) as recommend by its hardware design guide
- I have tried another SIM908-C but still no success
Regards
Waqas Shafique
I'm using sim908-C and have designed the hardware as described in its hardware design document. My issue is i'm not getting any voltage on SIM VDD and sim908-C is unable to find network i.e. relevant LED blink rate does not decrease.
When I power up the module I see some mV on SIM VDD for very short time then it reduces to 0V.
Please suggest what should I do?
Just for your information !
-I'm powering sim908-C directly from a lead acid 4V battery which can provide 2A burst
-I have tried 100nF and also 200nF capacitor on sim vdd
-100 uF capacitor is placed on sim908-C vdd (very close) as recommend by its hardware design guide
- I have tried another SIM908-C but still no success
Regards
Waqas Shafique