NB-IOT Network Module BC26, R2

Description

• Based on Quectel BC26 NB-IOT module
• Current supported bands: H-FDD B1/ B3 / B5 / B8 / B20
• Developing bands: B2* / B12*/ B13*/ B17* /B18*/ B19*/ B25*/ B26*/ B28*/ B66*
• The BC26 module is available in an LCC chip package and has an ultra-small size of 17.7mm × 15.8mm × 2.0mm to maximize the end-user requirements for small form factor modules and provide customers with a reliable connection.
• BC26 provides a wealth of external interfaces (serial port, SPI, ADC, etc.) and protocol stack (UDP/TCP/LwM2M, etc.)

Module Features:

• Lead out all pins and interface:
  • Pin definition please refer to board or attached image.
  • Pin Pitch 2.54mm
• On board 5.5V – 3.3V LDO reguator for power supply, low Iq 25uA
• On board logic shifter:
  • Can use regualtor 3.3V as logic volatge, or use external +5V logic voltage
  • Default logic use 5V
  • Included pins: Reset, netlight status, main serial port txd and rxd, PSM_EINT, RI, AUX txd and rxd.
  • All on board front right side.
• On board netlight status LED (default off)
• Antenna connector friendly, default placed IPEX connector, can remove and replace SMA or through-pin connector.
• Back side SIM card package is NANO SIM.
• Tested low power PSM mode, power use 60uA 3.3V. And 5mA for AT+CFUN=0.

Jumper Setup:

• Front two-way jumper: connect VIN power supply IN to +5V and Logic 5V, connected default.
• Back three-way jumper: Select logic 3.3V or 5V, 5V default.
• Back two-way jumper: Enable auto boot on power up. Enable default.

R2 Version Update:

• Remove the auto boot jumper, please only use boot pin to high ttl to boot up module.
• 3-way jumper to select reset / interrupt EINT.  EINT to quit low power mode.
• Lead out USB pins as SMD pads, but this is no need in most cases.

BC26 Features:

• Power supply voltage range: 2.1V ~ 3.63V
• Typical supply voltage: 3.3V
• Maximum current consumption under PSM: 5μA
• Typical current consumption under PSM: 3.8μA
• LTE Cat NB1: B1/B2*/B3/B5/B8/B12*/B13*/B17*/B18*/B19*/B20/B25*/B26*/B28*/B66*
• Transmit power  23dBm±2dB
• USIM interface  Supports 1.8V USIM card
• Main serial port:
  • Used for AT command transmission and data transmission;
  • After the module is powered on, it defaults to the adaptive baud rate mode (supports adaptive synchronization of the baud rate below 115200bps); the MCU needs to continuously send AT commands and modules to synchronize the baud rate. After returning OK, the synchronization is successful; after the wake-up wakes up the module The baud rate of successful synchronization after booting is used directly, without resynchronization.
  •  Can also be used for local software upgrade; default support 921600bps baud rate
• Debug serial port:
  • Used for software debugging to obtain the underlying log
  • Default baud rate: 115200bps
• Auxiliary serial port:
  • Used for software debugging to obtain the underlying log
  • Default baud rate: 115200bps
• Network protocol feature UDP/TCP/CoAP/LwM2M/SNTP/MQTT/PPP/TLS*/DTLS*/HTTP*/HTTPS*/FTP*
• SMS*  Text and PDU mode
• Data transmission characteristics
  • Single-tone: 25.5 kbps (downstream), 16.7 kbps (upstream)
  • Multi-tone: 25.5 kbps (downstream), 62.5 kbps (upstream)
• AT command
  • 3GPP TS 27.005 and 3GPP TS 27.007 defined commands (3GPP Rel.13/Rel.14*), and new AT commands for remote communication

Note:

• To use or test low power mode and function, do not use auto power on setup.

Additional information