The SIM7028 NB-IoT HAT is an NB-IoT (Narrow-Band Internet of Things) development board for Raspberry Pi. It is designed for applications that need low delay, low power, and low throughput, and is also suitable for IoT applications such as meters, remote control, asset tracking, remote monitoring, remote healthcare, bicycle-sharing, and so on.
Features
Compatible with Raspberry Pi Zero/Zero 2/2B/3B/3B+/4B.
Onboard UART interface for AR command transmission and firmware update.
Onboard control pins for connecting with host boards like Arduino/STM32.
Onboard USB to UART chip, the UART communication pin can be configured via jumper.
Onboard nano SIM card slot, compatible with NB-IoT specific card.
1x LED indicator, easy to monitor the working status. (the STA indicator normally shows the running status of the HAT, the display can be customized to add the STA indicator).
Baudrate: 2400bps ~ 460900bps (115200bps by default).
Control via AT commands (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands).
Supports SIM application toolkit: SAT Class 3, GSM 11.11, USAT.
Comes with online development resources and manuals (examples for Raspberry Pi/Jetson Nano/Arduino/ESP32).
Communication Parameters
Band Support:B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B26/B28/B66/B70/B85
Transmission Power:Class 3 (0.25W@LTE)
Data Rate:UL: ≤159KbpsDL: ≤127Kbps
Other Parameters
Power supply: 2.2V~4.3V
Logic level: 5V / 3.3V (3.3V by default)
Standby mode current: 0.8uA
Sleep mode current: 0.11mA (@DRX=2.56s)
Operation temperature: -40°C ~ 85°C
Storage temperature: -45°C ~ 90°C
Dimensions: 30.2mm x 65mm
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