Hello all,
I have an IoT use-case with module fully powered down most of the time.
With low duty cycle I need to power-up and transmit data, everything is working well but I was looking for ways to estimate the radio link quality and it looks like AT+QCSQ does not a great job at it for first seconds after power-up. I check on eval board, spaming “AT+QCSQ” after power-up, and got something similar:
[2021-08-10_18:09:47:728]RDY
[2021-08-10_18:09:48:318]AT+QCSQ
[2021-08-10_18:09:48:318]+QCSQ: “NOSERVICE”
[2021-08-10_18:09:48:318]OK
[2021-08-10_18:09:48:729]AT+QCSQ
[2021-08-10_18:09:48:729]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:48:729]OK
[2021-08-10_18:09:49:073]AT+QCSQ
[2021-08-10_18:09:49:073]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:49:073]OK
[2021-08-10_18:09:49:358]AT+QCSQ
[2021-08-10_18:09:49:358]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:49:358]OK
[2021-08-10_18:09:49:720]AT+QCSQ
[2021-08-10_18:09:49:720]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:49:720]OK
[2021-08-10_18:09:50:096]AT+QCSQ
[2021-08-10_18:09:50:096]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:50:096]OK
[2021-08-10_18:09:50:260]
[2021-08-10_18:09:50:260]APP RDY
[2021-08-10_18:09:50:411]AT+QCSQ
[2021-08-10_18:09:50:411]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:50:411]OK
[2021-08-10_18:09:50:743]AT+QCSQ
[2021-08-10_18:09:50:743]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:50:743]OK
[2021-08-10_18:09:51:042]AT+QCSQ
[2021-08-10_18:09:51:042]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:51:042]OK
[2021-08-10_18:09:51:374]AT+QCSQ
[2021-08-10_18:09:51:374]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:51:374]OK
[2021-08-10_18:09:51:748]AT+QCSQ
[2021-08-10_18:09:51:748]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:51:748]OK
[2021-08-10_18:09:52:308]AT+QCSQ
[2021-08-10_18:09:52:308]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:52:308]OK
[2021-08-10_18:09:52:625]AT+QCSQ
[2021-08-10_18:09:52:625]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:52:625]OK
[2021-08-10_18:09:52:958]AT+QCSQ
[2021-08-10_18:09:52:958]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:52:958]OK
[2021-08-10_18:09:53:290]AT+QCSQ
[2021-08-10_18:09:53:290]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:53:290]OK
[2021-08-10_18:09:53:579]AT+QCSQ
[2021-08-10_18:09:53:579]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:53:579]OK
[2021-08-10_18:09:53:899]AT+QCSQ
[2021-08-10_18:09:53:899]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:53:899]OK
[2021-08-10_18:09:54:216]AT+QCSQ
[2021-08-10_18:09:54:216]+QCSQ: “eMTC”,-125,0,8,0
[2021-08-10_18:09:54:216]OK
[2021-08-10_18:09:54:593]AT+QCSQ
[2021-08-10_18:09:54:593]+QCSQ: “eMTC”,-62,-86,107,-10
It took 5sec after AP READY to get proper values.
Is this normal? Can I do something to have proper reading before? (5sec is way to long in my application ^^)
Thank you, have a good day,