Put the EC25 to sleep with Arduino

IoT Modules LTE Standard Module
1

Hi,
I’m doing some experiments with a MiniPCIe EC25-E and a STM32 board. I want to put the EC25-E to sleep and I’m using the EC2x&EG9x Power Management Application Note. I’m following section 4.2 that instruct how to put it in sleep mode through UART port.

My problem is that is not working. I send the following AT commands through UART (in the same order):

  sendATComm("AT+QURCCFG=\"urcport\",\"uart1\"", "OK\r\n");
  delay(200);
  sendATComm("AT+QCFG=\"apready\",1,0,800", "OK\r\n");
  delay(200);
  sendATComm("AT+QCFG=\"urc/ri/smsincoming\",\"pulse\",1000,1", "OK\r\n");
  delay(200);  
  sendATComm("AT+QCFG=\"risignaltype\",\"physical\"", "OK\r\n");
  delay(200);
  sendATComm("AT+QSCLK=1", "OK\r\n");
  delay(200);
  digitalWrite(DTR,HIGH);

all AT commands get the OK response.
How do I know is not in sleep mode? I’m monitoring the current consumption and after these commands, I don’t see a drop. I always about 70mA. According to the design guide the current consumption in sleep mode should be about 5mA.
Any help would be appreciated

2

Hi,
Sorry for replying you so late. When you enter the sleep mode, the serial port will not respond to the AT command. You can try whether the AT command can be sent to judge whether you enter the sleep mode. On the other hand, you can check whether cables are correctly connected between the module and the host, as described in the guide document.