Parameter:

Input voltage: 5 ~ 18V (low power consumption is 5 ~ 6V)

Input power: ≥10W (peak)

Operating temperature: -40 ~ 85 degree

Usage: serial AT command configuration

Supported frequency band: 850/900/1800 / 1900MHZ

Support network: GSM / GPRS

Transmission rate: up to 85.6kbps

Network protocol: TCP / UDP / FTP / HTTP / SSL, etc.

TCP: Transport layer protocol TCP, enabling relatively reliable data transmission.

UDP: Transport layer protocol UDP, which realizes relatively low traffic transmission.

TEL: can make and receive calls for alarm and monitoring.

SM5: can send and receive short messages for short message alarm, monitoring and remote control.

DTMF: During the call, monitor the key input value of the other party and perform key control.

FIP: File transfer protocol, which can be used for firmware upgrades, etc.

LBS: Base station positioning, obtaining the location information of blanket mobile terminal users through the wireless communication network of blanket mobile operators.

Pin Function:

VIN: power input, support 5 ~ 18V input

GND: ground wire, connected to power ground

TXD: serial data transmission

RXD: Serial data reception

PEN: On-board power supply is enabled to control the core board on and off

NET: network status indication, generally not used, can be left floating

DTR: control module sleep and wake up, generally not used, can be left floating

VBAT: power input, for battery power, can be left unconnected

GND: ground wire, connected to power ground

VEX: core module power output pin, can be used for level conversion circuit

STA: running status indication, generally not used, can be left floating

RI: Ring indication, if not used, it can be left floating

MICN: Negative audio input level, generally not used. Floatable

MICP: positive audio input, generally not used, can be left floating

SPKN: negative audio output level, generally not used, can be left floating

SPKP: positive audio output, generally not used, can be left floating

RTC: power supply pin for RTC, generally not used, can be left floating