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=== PSM 状态 === * PSM: 网络协议栈、射频全关,硬件外设未断电,可发 AT * PSM≠深度睡眠;只有深度休眠时模组功耗最低,约 3uA 1) 模组进入了 PSM 状态不一定能进深度睡眠,进入 PSM 后再进入深度睡眠必须满足两个条件:① AT+SM=UNLOCK_FOREVER 使能深度睡眠 ② 断开模组 TCP 连接 2) 使用模组 wakeup_in 引脚唤醒深度睡眠后,模组仍处于 PSM 状态,若要退出 PSM 需要 MCU 发送有网络交互(如 AT+PING AT+MIPLUPDATE 等)的指令 <source lang=bash> AT+CPSMS=0 # disable the use of PSM AT+CPSMS=1 # enable the use of PSM AT+CPSMS? +CPSMS: 1,,,"00100011","00100010" </source> T3412 = 1h x 3, T3324 = 1min x 2 * T3412: Requested extended periodic TAU value (GPRS Timer 3 information element) * T3324: Requested Active Time value (GPRS Timer 2 information element) <source lang=bash> AT+CPSMS=1,,,"T3412","T3324" # 使能模组 PSM 功能,并根据需要设置模组 T3324 的值,T3324 和 T3412 值的编码格式参考 GPRS timer 3(AT 文档附录),当前模组端只能设置 T3324 值,其值开卡时已固定,模组端无法修改 AT+CEREG=5 # 确认 PSM 参数是否设置成功 AT+CEREG? +CEREG: 5,1,"5F12","01248A1C",9,"00",0,0,"00100010","00100011" # 参考 AT 手册,最后两个参数分别代表 T3324 和 extended periodic TAU value(T3412) </source> 高 3 位为单位,低 5 位为值: Table 10.5.163a/3GPP TS 24.008: GPRS Timer 3 information element (T3412) <source lang=bash> 8 7 6 0 0 0 value is incremented in multiples of 10 minutes 0 0 1 value is incremented in multiples of 1 hour 0 1 0 value is incremented in multiples of 10 hours 0 1 1 value is incremented in multiples of 2 seconds 1 0 0 value is incremented in multiples of 30 seconds 1 0 1 value is incremented in multiples of 1 minute 1 1 0 value is incremented in multiples of 320 hours (NOTE) 1 1 1 value indicates that the timer is deactivated. </source> '''NOTE:''' This timer value unit is only applicable to the T3312 extended value IE and T3412 extended value IE (see 3GPP TS 24.301 [120]). If it is received in an integrity protected message, value shall be interpreted as multiples of 320 hours. Otherwise value shall be interpreted as multiples of 1 hour. * e.g. "01000111" equals 70 hours Table 10.5.172/3GPP TS 24.008: GPRS Timer 1/2 information element (T3324) <source lang=bash> Bits 6 to 8 defines the timer value unit for the GPRS timer as follows: 8 7 6 0 0 0 value is incremented in multiples of 2 seconds 0 0 1 value is incremented in multiples of 1 minute 0 1 0 value is incremented in multiples of decihours 1 1 1 value indicates that the timer is deactivated. Other values shall be interpreted as multiples of 1 minute in this version of the protocol. </source> * e.g. "00100100" equals 4 minutes [[文件:M5311-T3324-T3412.jpg]] '''当前模组端只能设置 T3324 值,T3412 值开卡时已固定 , 模组端无法修改''' [[文件:10086.NB-IoT.Modes.png | 600px]] 如下命令注销,设备即从 OneNet 下线: AT+MIPLCLOSE = 0 <br>
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