Pico-2g-expansion

Pico 2G Expansion

Raspberry Pi Pico 2G Expansion is a QUAD-Band GSM/GPRS/GNSS Expansion designed dedicatedly for Raspberry Pi Pico with UART, USB 2.0 Interface, 850/900/1800/1900 MHz, Bluetooth 3.0 based on SIM868 module to perform easy and efficient communication. Pico 2G Expansion works on the embedded TCP/UDP Protocols with Multi-constellation GNSS receiver support.

Pico 2G Expansion also includes a 1.14-inch display with a resolution of 240 x 135 pixels, 65K RGB colors, and a sharp and vivid exhibiting effect, designed primarily for user engagement via SPI connection by incorporating a GPIO header. The 1.14-inch LCD includes the ST7789 Driver and SPI Interface, decreasing the amount of IO pins required.

Features

• 1.14” LCD
• Low Power Consumption
• 850/900/1800/1900 MHz Frequency band
• Bluetooth 3.0
• LED Indicators
• Serial/USB/SIM868 Selection Jumpers

Specifications

• Operating Voltage - 5V(via USB)
• Communication - UART/USB 2.0
• SIM Module - SIM868
• Compatibility - Raspberry Pi Pico
• Operating Temperature - -400 ~ 800 C
• Dimensions - 68 x 119.64 mm

File:Pico 2g expansion.png

Buy it From : Click Here

Pinout

PICO 2G Board	PICO Pins
VCC	5V
GND	GND
LCD DIN	GP11
LCD CLK	GP10
LCD DC	GP8
LCD CS	GP9
LCD RST	GP12
LCD BL	GP13
SIM868 PWRKEY	GP22
SIM868 TX	GP1
SIM868 RX	GP0

Jumper Selection

SIM868 Operation (Device Selection)
Jumpers 1	Jumper 2	MODE
Short P_TX - U_RX	Short P_RX - U_TX	Pico to USB Communication
Short U_RX - S_RX	Short U_TX - S_TX	USB to SIM868 Communication
Short P_TX - S_RX	Short P_RX - S_TX	SIM868 to Pico Communication
Open	Open	No Communication

Installation

USB to SIM868 Communication

• Connect Selection jumpers for USB to SIM868 communication mode.
• Insert SIM card on SIM card slot, and connect GSM and GSM Antenna on antenna connector.
• Connect USB on the USB port of Pico 2G GSM board.
• Press and hold PWR_KEY to turn on the GSM module (SIM868) and release it once STATUS led turned on.
• Now open any Serial terminal app on (Windows or Linux), Set com port of Pico 2G expansion and baud rate to 9600.
• Now you can send AT commands from the terminal to control your SIM868 Module.

MicroPython

• Connect Pico on Pico 2G Expansion.

• Connect jumper in SIM868 to Pico Communication mode.

• Connect GSM and GPS antenna on Antenna connectors.

• Insert 2G enabled SIM card on sim card port.

• Download or clone the repository of Pico 2G expansion from the below link.

https://github.com/sbcshop/Pico-2G-Expansion

• Now open the below examples code as per their function to test the pico 2G Expansion in Thonny Ide.
  • Make_Call.py : To make calls on a defined number.
  • Send_SMS.py : To send a Text message on the defined number.
  • fetch_gps.py : Fetch the Current GPS NMEA data.
  • BT_Test.py : Discover nearby Bluetooth devices.

• To make call, Open the Make_Call.py file in thonny ide and enter your mobile number from 123456 to the actual number at the end of this code, and timeout to release the code after specified seconds (i.e: 15 seconds in default case).

check_start() # Initialize SIM Module 
network_check() # Network connectivity check
make_call("123456" , 15) # Replace "123456" with Mobile number and 15 with timeout to hang call in seconds

• To send text message, Open the Send_SMS.py and edit the below line to update tesxt message and recipient number from 123456 to recipient Number.

# SMS test
sms_text ="Hello from Pico 2G."
send_sms("123456", sms_text)

Resources

• 'Software
  • SIM868 AT commands Manual

• Github
  • Source Code