NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 10 / 57
2.2. Key Features
The following table describes the detailed features of BC66 module.
Table 2: BC66 Key Features
Feature
Details
Power Supply
Supply voltage: 2.1V ~ 3.63V
Typical supply voltage: 3.3V
Power Saving
Maximum power consumption
: 5μA
Typical power consumption: 3.5
μA
Frequency bands
LTE Cat NB1:
B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26*/B28/B66
Transmitting Power
23dBm±2dB
USIM Interface
Support 1.8V USIM card
UART Interfaces
Main UART Port:
Used for AT command communication and data transmission.
By default, the module is in auto-baud mode, and it supports automatic
baud rates not exceeding 115200bps. When powering on the module, the
MCU has to send
AT
command consecutively to synchronize baud rate
with the module.
When
OK
is returned, it indicates the baud rate has been
synchronized successfully. When the module is woken up from PSM or
idle mode, the baud rate synchronized during start-up will be used directly.
Also can be used for firmware upgrade, and in such case, the baud rate is
921600bps by default.
Debug UART Port:
Used for firmware debugging
Default baud rate: 115200bps
Auxiliary UART Port:
Used for firmware debugging
Default baud rate: 115200bps
Network Protocols
UDP/TCP/LwM2M/MQTT/CoAP*/PPP*/TLS*/DTLS*/HTTP*/HTTPS*
SMS*
Text/PDU Mode
Data Transmission
Features
Single-tone: 25.5kbps (DL)/16.7kbps (UL)
Multi-tone: 25.5kbps (DL )/62.5kbps (UL)
AT Commands
3GPP TS 27.005/3GPP TS 27.007 AT commands (3GPP Rel. 13/Rel.14*)
and Quectel Enhanced AT commands
Firmware Update
Upgrade firmware via main
UART
port or DFOTA
