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  • boolf commented on Nobilis's instructable GSM/GPRS Module DIY Kit1 year ago
    GSM/GPRS Module DIY Kit

    Very Nice instructable, and appreciated scrutany of the manufacutrers manuls BUT I think the 4K7 resistor you added is put (as I can see in your photos) between pins 12(SIMCLK) and 14(TX) and not as you intended.Please check the pinout by a simple goole search for M590E pinout:

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