Neoway M660 User Manual

Also see for M660: At command guide User manual

Neoway M660 User Manual Manual pdf 20 page image

Shenzhen Neoway Technology Co., Ltd. Page 20 of 32Note:Avoid sparks and glitches on UART signals while the module is in a turning on procedure.Avoid sending any data to UART during the beginning of 2 seconds after the module being turnedon.6.4 Sleep mode6.4.1 DTRGenerally DTR is used for sleep mode control. For details, see AT commands manual. Based on thesetting of the selected mode, pulling DTR low will bring the module into relevant power savingmode. Working in this mode, the power consumption is around 2mA, depending on the DRX settingof network.In sleep mode, the module can also respond to the incoming call, SMS, and GPRS data. The hostMCU can also control the module to exit sleep mode by controlling DTR.The controlling of sleep mode:1) Keep DTR high in normal working mode. Activate the sleep mode by using the AT commandAT+ENPWRSAVE=1.2) Pull DTR low, the module will enter sleep mode, but only after process and pending datafinished.3) UART is not available in sleep mode.4) In sleep mode, the module can be woken up by the events of incoming voice call, received data,or SMS. Meanwhile the module will send out the unsolicited messages by the interface of RINGor UART.Upon receipt of the unsolicited messages, the host MCU should pull DTR high firstly, otherwisethe module will resume sleep mode shortly. And then the host MCU can process the voice call,received data, or SMS. After processing is finished, pull DTR low again to put the module intosleep mode.