https://devzone.nordicsemi.com/f/nordic-q-a/20904/connecting-old-nokia-3310-to-nrf52Hi, I want to connect old nokia 3310 to NRF52 DK. Please let me know if any one has information about it? Based on my research old nokia phone uses M bus and F bus communication protocol so then how is it possible to connect it to the UART ofen-USTelligent Community 13Wed, 29 Mar 2017 10:16:15 GMThttps://devzone.nordicsemi.com/thread/81638?ContentTypeID=1Wed, 29 Mar 2017 10:16:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1ecad78-f60e-40a6-b79a-3d46e46fdf03Usman Rashid<p>From the phone I will get 3.2 volts. I have to remove MAX232 which is the voltage converter and covert 3.2 to 12 volt.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/81637?ContentTypeID=1Wed, 29 Mar 2017 08:58:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4f8395aa-14f1-4bf5-a1dd-efdf29ae731fWojtek<p>what are the voltage levels expected?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/81635?ContentTypeID=1Wed, 29 Mar 2017 08:57:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cf2fe786-3e56-4934-a271-5421284c76faUsman Rashid<p>I have attached the description now with the above main question. Confused that how can I connect NR52 TO nokia 3310</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/81636?ContentTypeID=1Wed, 29 Mar 2017 08:53:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7bc46aba-5976-4368-8782-63bda227b623Wojtek<p>I don&#39;t think that is nRF5x specific question... You got the protocol description? Not sure about mbus, but f-bus seems to be like uart (dunno about voltage levels...). So, just use uart driver?</p><div style="clear:both;"></div>