Features:
1. SIM7028 NB-IoT HAT is a small size, low power consumption and powerful Raspberry Pi HAT with NB-IoT (narrowband Internet of Things) function, supports global frequency bands, supports TCP, UDP, LWM2M, COAP, DTLS, DNS, NTP, PING, HTTP(S), MQTT(S), TLS/SSL, etc.
2. Designed for applications requiring low latency, low power consumption, and low throughput. It is also suitable for instrumentation, remote control, asset tracking, remote monitoring, telemedicine, shared bicycles, etc.
3. Standard Raspberry Pi 40PIN GPIO expansion header, supports Raspberry Pi series boards and Jetson Nano, etc.
4. Support TCP, UDP, LWM2M, COAP, DTLS, DNS, NTP, PING, HTTP(S), MQTT(S), TLS/SSL, etc.
5. Onboard Type-C interface for software debugging
6. Onboard UART control pin for connecting to Arduino/STM32 and other motherboards
7. 1x LED indicator light to easily monitor working status
8. Onboard USB to UART chip, UART communication pins can be configured through jumpers
9. Onboard nano SIM card slot, compatible with NB-IoT dedicated card
10. Baud rate: 2400bps-460900bps (default 115200bps)
11. Control via AT commands (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT commands)
12. Support SIM application toolkit: SAT Class 3, GSM 11.11, USAT
13. Comes with online development resources and manuals (Raspberry Pi/Jetson Nano/Arduino/ESP32 examples)

Product parameters:
1. Frequency band: B1/B2/B3/B4/B5/B8/B12/B13/B14/B17/B18/B19/B20/B25/B26/B28/B66/B70/B85
2. Data rate:
Less than or equal to 159Kbps (uplink)
Less than or equal to 127Kbps (downstream)
3. Power supply: 5V
4. Logic level: 5V/3.3V (default 3.3V)
5. Total current (idle mode): 4mA
6. Single module current (VBAT=3.3V):
Idle mode: 2.8mA
PSM mode: 0.8uA
DRX mode: 0.11mA@idle (DRX=2.56s)
eDRX mode: 0.018mA@idle (eDRX=163.84s; PTW=25.6s)
7. Product size: 65 x 23.2mm
8. Weight: 60g