STM32M2M Low-Power Wireless System Board

Description

Board Features V2:

• More flexiable board design, modulized functions:
  • RS-232 function presolder module board
  • power supply function by USB-battery charger board.
  • M2M communication function, Currently support M2M communication module board like
    • SIM7020G
    • SIM7070G
    • SIM7080G Board version V2
• Most features similar to V1 board.
  • Based on STM32L151 control chip
  • 1x channel sensor data collection
  • 1x RS233 interface communication
  • 1x M2M Wireless communication
  • USB Charge, battery power supply, low power usage
  • 2x programmable LEDs, and 1x programmable button
• Board image is shown in color green

Documentation of V2 board please see on this page. 

Board Features V1:

• Support communicatoin via
  • BC35G NB IOT low power module
    • Frequency Band: B1 / B3 / B5 / B8 / B20 / B28 (B28 is still developing)
    • Cover many common frequency bands, but please check before order.
    • Communicate via UART3 of STM32
    • Jumper for checking power use.
    • On board extra reserved pins
    • SIM slot on back side of PCB board.
  • RS-232 Port
    • Communicate via UART1 of STM32
    • Jumper for checking power use.
• Control by STM32L151 low power microcontroller
  • Jumper for checking power use.
  • PB0 PB1 PB2 PB9 programmable LED
  • PB12 programmable button
  • Reserved UART2 interface.
  • Program SWD port.
  • On board reserved DHT11 temperature sensor port via PA7
• On board battery charger controller TP4056
  • Charge via micro USB.
  • Battery read via resistor divider by STM32 chip PA0 pin.
  • All battery protection: over current, over voltage, etc.
• For Charge jumper and switch:
  • For charge only: jumper – top, switch – top
  • For battery power only: jumper – Any, switch – bottom
  • For USB power only, removed battery: jumper – bottom, switch – bottom
  • For USB power + charging battery together: jumper – bottom, switch – top

Documentation of V1 board please see on this page. 

Additional information