Creg

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Both AT CREG and AT COPS are standardized by 3GPP and both in the specification 27 007 Although manufacturers might at least theoretically deviate a little or perhaps more likely lag

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Network registration information CREG output depends on modem configuration By sending AT CREG 0 one can disable network registration code which is your case By sending

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The problem now is that I check the registration status with AT CREG which is always CREG 1 0 which means The meaning of this is from documentation CREG y x y 1 Enable

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AT CREG applies to circuit switched services AT CGREG to packet switched GPRS and AT CEREG to EPS LTE The details of which of the above parameters are valid for which

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CSDN Bigtable Bigtable Bigtable GFS Chubby Lock

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Maybe you re not powering it up with enough supply Your module does not automatically register to network It happened to me when I power my sim800l with the arduino 5v it works smoothly at first

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CREG 1 5 which indicates registered as roaming The weirdest thing is that even when CREG states no Network Registration I have network access through the SARA modem In

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The command AT CREG will probably give you CREG 0 3 meaning it couldnt connect AT COPS is a query that yields the possible options for the result of a command or its inputs

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SIM868 CREG 0 0 RT CPIN READY CSQ 14 22 SIM AT CREG 0 0