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Arduino Uno R3

Arduino UNO in Bangladesh The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller.

Price BDT 399
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AI-thinker A9G GSM/GPRS+GPS/BDS Development Board

The A9G development board is a multifunctional development board based on AI Thinker’s A9G GPRS/GSM + GPS/ BDS module.

You can use it to verify the basic communication and peripheral functions of A9G module. It has the basic phone/SMS, GPRS networking communications and GPS/BDS dual mode positioning function. There are lithium battery charge management, microphone, speaker interface, USB communication interface, multiple user keys/ led, TF card slot, acceleration sensor, SPI interface, I2C2 interface, ADC interface on the boards, so you can develop different functions with this board.

BDT 1,799
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Description

Applications

  • Remote monitoring intercom with GSM and microphone/speakers,
  • Remote monitoring camera with GPRS + TF + camera extension board,
  • Wechat payment slot machine scheme with the slot machine function.
  • Anti-theft tracking device with GPRS + GPS and accelerometer
  • Supports voice call and SMS message.
  • Supports GSM/ GPRS frequency: 850/ 900/ 1800/ 1900 MHz.
  • Supports GPRS data service, the maximum download data rate is 85.6 Kbps, upload data is 42.8 Kbps.
  • Supports GSM07.07, 07. 05 AT commands and Ai-Thinker explosion command.
  • Supports 3 serial ports, one download serial port, one AT command port.

  • Specifications
  • Size: 19.2mm x 18.8mm x 3mm
  • Working temperature: -30 ℃-80℃
  • Working voltage: 3.5v – 4.2v (it’s best to power by 4v)
  • Power voltage: >3.5 Volts
  • Low power consumption:
  • Sensitivity GPIO level: 2.8 volts

Pinout

A9G-GSM-GPRS-GPS-BDS5

Connections

  • Connect USB-TTL with 4 wires when debugging, VUSB-5V; GND-GND; AT_TX-RX; AT_RX-TX
  • Or power supply by USB, then connect another three lines, GND-GND; AT_TX-RX; AT_RX-TX
  • Or power by lithium battery, VBAT-(3.3v-4.2) V; GND-GND; AT_TX-RX; AT_RX-TX; (VBAT power supply, need to press power_key button for about 2s)

Power On

  • A9G development board can be powered by USB or lithium battery.
  • It does not require any operation when powered 1-2s.
  • Please press the Rst_Key button to reset.
  • The module enters AT command mode by default.

NOTE: The board needs 2A supply with 100uF and 10uF over VCC and GND

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