IOT Gateway | Grep Tech https://www.grep.sg AI Vision, Industrial IoT & Business Solutions Tue, 24 Mar 2026 03:06:24 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://www.grep.sg/wp-content/uploads/2020/04/cropped-gt_new_logo_square-32x32.png IOT Gateway | Grep Tech https://www.grep.sg 32 32 4G Lora Gateway S281 https://www.grep.sg/product/4g-lora-gateway-s281/ https://www.grep.sg/product/4g-lora-gateway-s281/#respond Sat, 13 Nov 2021 03:49:32 +0000 https://www.grep.sg/?post_type=product&p=4229
  • Related Voltage: Recommend: DC 12V/1.5A, range:9-36VDC;
  • RJ45, 10/100M Ethernet interface;
  • Support 100 wireless temperature, temperature and humidity nodes, and 100 RS485 serial port nodes at the same time;
  • Working frequency band: 420MHZ~450MHz (868MHz, 915MHz can be customized);
  • Modbus TCP protocol and Modbus RTU protocol are compatible with transparent transmission;
  • Supports 10 user numbers for receiving device daily reports, dropped calls, serial port data overrun, and specific SMS alarm messages triggered abnormally.
    • ]]>     The 4G Lora Gateway S281 is the latest Lora technology for industrial internet of things solutions. It supports upto 99 wireless temperature humidity modules, the wireless temperature humidity sensor powered up by normal AAA battery, and 99 wireless serial port modules with a monitoring radius of upto 2500m.

    4G Lora Gateway S281 is widely used in agricultural greenhouse temperature and humidity collection and monitoring, chemical plant temperature and humidity collection and monitoring, electroplating plant temperature and humidity collection and monitoring, hospital sites and fruit and vegetable storage warehouses and other places temperature and humidity collection and monitoring. 

    the KPIIOT IoT Cloud Platform and OPC, SCADA and MES systems to build an industiral IoT Solution.

    Specifications:

    Item

     Specification

    CPU

     ARM® Cortex™-M4 32Bits RTOS

    Memory

     Max.2000 records and 500 alarm recorder.

    Cellular

     GSM/3G/4G Lte

    LoRa Frequency

     Default: 420HMz-450MHz,Optional:868MHz or 915MHz

    Related Voltage

     Recommend: DC 12V/1.5A, range:9-36VDC

    Power Consumption

     Standby:12V/130mA; Working:12V/150mA; Charging Battery:12V/180mA

    Backup Battery

     3.7V 900mAH, last about 3 hours.

    USB Port

     Micro USB

    RJ45

     RJ45 10/100M Ethernet interface

    SIMCard

     3V SIM

    Working Temperature

     -10-+70℃

    Humidity

     Related humidity 95%

    Dimension

     88mm*75mm*30mm

    Weight

     450 g

     

    Features:

    • Built-in ARM®Cortex ™ -M4 32-bit RISC core real-time operating system, software watchdog and hardware watchdog to prevent fake crashes;
    • Wide working voltage design, support 9 ~ 36VDC power supply, and anti-reverse protection design;
    • Modular structure design, GSM / 3G / 4G network upgrade only needs to replace the module to realize the network upgrade;
    • Support remote SMS to restart the device and configure device parameters;
    • Using local configuration software, remote SMS, APP to set parameters, easy to operate and easy to use;
    • Supports 10 user numbers for receiving device daily reports, dropped calls, serial port data overrun, and specific SMS alarm messages triggered abnormally;
    • Built-in powerful timer function, support timing automatic reporting, timing SMS daily report, timing online, timing restart and other functions;
    • Modbus TCP protocol and Modbus RTU protocol are compatible with transparent transmission;
    • Ethernet comes with a transformer isolator, 2KV electromagnetic isolation, and shell isolation protection;
    • Adopt time division multiplexing, multi-channel mounting, less interference, more mounting nodes, can support up to 99 temperature and humidity collection points
    • It can monitor the terminal battery level in real time to ensure that the device data does not drop.
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