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prehensile/features.md

Last active December 29, 2018 18:38
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Specs for SIM800 board GSM-GPRS-V4.72, designed by UNV. Copypasted from ebay for reference.
Raw
features.md

Features

NOTE: Not my specs, copypasted from ebay for reference.

  • Serial interface: TTL/USART serial support.
  • Antenna circuit: Three common antenna interfaces (SMA interface only soldered)
  • Two way power interface: DC IN 5 v DC power supply OR 3.5-4.2 V power supply, suitable for lithium battery power supply applications.
  • Audio interface: increased by 3.5 MM audio interface, easily implement voice calls, voice broadcast, etc.
  • SIM booth: new mainstream type metal MICRO thrust booth, strong and durable.
  • LED indicator light: onboard two LED indicators. Allows you to monitor module working condition.
  • PCB show: each interface screen printing mark, convenient for secondary development, the design fully follow SIM800 / A hardware design manual.
  • Antenna Included!
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pins.md

Pin Assignment

NOTE: Not my specs, copypasted from ebay for reference.

  • DCIN: 5V DC power input. Used to power development board
  • GND: systematic
  • 3V9: input power supply range: 3.5-4.2V
  • VDD: TTL serial port used to match the output of the high voltage value
  • RXD: SIM800 data receiving end, you need to contact the sender of the external system
  • TXD: SIM800 data transmitting side, the receiving side needs to access external systems
  • GND: GND with other systems without any distinction
  • RST: SIM800 reset, active low effective duration 600MS
Raw
specifications.md

Specifications

NOTE: Not my specs, copypasted from ebay for reference.

  • Support 3.3V / 5V TTL level control, convenient and a variety of commonly used single-chip, such as ARDUINO / 51 / STM32 and other communications
  • The module lists TX / RX / GND separately, and is convenient for use
  • With a standard serial interface, can be easily controlled by PC or debugging
  • With headphone and microphone interface, can easily test the GSM voice call function
  • With SIM card electrostatic protection chip, plug the SIM card when the static electricity generated protection
  • All available SIM800 pins are available for easy development of various SIM800 applications
  • With RTC backup battery
  • With NET_STA indicator, easy to watch the current SIM800 state
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