Power Supply Mode
- 500mA @ 3.3V
Test based on our current SIM7020E module
| Module | Current | - |
|---|---|---|
| Registeration Mode | ~15mA | - |
| Registered Idle Mode | ~5mA | - |
| PSM mode | 110 ~ 140 0uA |
To enter into PSM mode
- AT+CFUN=0,0 // minimium function mode
- AT+CFUN=1,1 // full working mode
- AT+CPSMS=1 // turn on PSM mode
Quit PSM mode
- Short pulse Boot pin to leave PSM mode
Demo video
- https://www.youtube.com/shorts/S57VZSJNvnw
- Notice in some of our modules, the pull-up resistors are costly to power, which has to be removed for best low power performance.
- Double check if your net work support PSM mode, or EDRX mode, we don't have it here (cn), so can not test
PSM AT commands demo
turn on/off PSM mode examples
AT+CPSMSTATUS=1
OK
//开启 PSM 事件上报
AT+IPR=115200
OK
//固定波特率
AT+CEREG=4
OK
AT+CEREG?
+CEREG:
4,1,"5B57","01A50B1A",9,"00",,,"11100000","1110000
0"
OK
AT+CPSMS=1,,,"01011111","00000001"
OK
+CEREG:
1,"5B57","01A50B1A",9,"00",,,"11100000","11100000
"
+CEREG:
1,"5B57","01A50B1A",9,"00",,,"00000001","11100000
"
+CPSMSTATUS: "ENTER PSM"
//开启 PSM 模式，并且设置 T3412_ext 和 T3324
AT+CEREG?
+CEREG:
4,1,"5B57","01A50B1A",9,"00",,,"00000001","111000
00"
OK
//查询网络配置的定时器
AT+CEREG=0
OK
//禁用网络注册 URC
AT+CPSMS=0
OK
//关闭 PSM
PSM 和 UDP 测试用例
//PSM 和 UDP 测试示例
AT+CPSMSTATUS=1
OK
//开启 PSM 事件上报
AT+IPR=115200
OK
//固定波特率
AT+CPSMS=1,,,"01011111","00000001"
OK
+CPSMSTATUS: "ENTER PSM"
//开启 PSM 模式，并且设置 T3412_ext 和 T3324
+CPIN: READY
+CPSMSTATUS: "EXIT PSM"
//拉低 PWRKEY 从 PSM 唤醒。
//PSM 模式退出时上报 URC。
AT+CSOC=1,2,1
+CSOC: 0
OK
//建立 UDP 连接
AT+CSOCON=0,8309,"117.131.85.139"
OK
AT+CSOSEND=0,0,"Hello Light"
OK
+CSONMI: 0,28,68656C6C6F2053494D3730323045
+CPSMSTATUS: "ENTER PSM"
//发送数据到 UDP 服务器
//从 UDP 服务器接收数据
//如果数据传输完毕，模式将自动进入 PSM 模式
Sleep mode
AT+CSCLK=1 OK //进入慢时钟模式，然后拉高 DTR，模块就会进入休眠模式 //拉低 DTR，模块会退出休眠模式
6.4.2 方法二
//sleep 模式示例 AT+CSCLK=2 OK //自动进入慢时钟模式，当没有外部设备与模块交互时，模块会自动进入休眠模式 //发两次 AT 给模块即可唤醒模块