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How to wire up GSM Modem(DCE) With MAX485

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Sultanpepper123:
I am trying yo figure out how to directly connect a GSM modem (say SIM800) with a MAX485 . The purpose of this is to make an RS485 GSM Modem. I am struggling how to wire it up, do i wire the CTS of the DCE(Modem) to the RE/DE pin together ?

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