SerialPort-GSM + Express Server

See https://github.com/zabsalahid/serialport-gsm
Wraps some functionality of the serialport-gsm library in an express server for on-demand access to the GSM modem.

Patches a minor bug in mentioned library regarding ussd handling.

Adds a simple multiline handling implementation as the original library does not support it.

• Read multiline SMS messages
• Read all phonebook entries

List of available routes

Route	Description
/check-sim-status	Gives the status of the SIM card
/read-sms/:id	Reads a specific SMS by ID
/read-sms	Reads all SMS messages
/check-sim-memory	Checks the SIM memory status
/network-signal	Checks the network signal strength
/modem-serial	Checks the modem serial number
/phonebook-storages	Checks the available phonebook storages
/phonebook-entries	Reads the phonebook entries
/send-ussd	Sends a USSD request. Example: /send-ussd?code=%2A100%23 for *100#
/cancel-ussd	Cancels the current USSD request

Additionally, adds access to a couple of modem events on the sever for further processing, e.g. logging or sending to sockets.

Also adds & serves a dummy web interface (WIP) based on webComponents (showelace UI library) that enables to build something more user-friendly.

• Lists all SMS messages
• Renders messages content on button click

Installation

npm install

Usage

• Connect your GSM module (e.g. sim800c over USB)
• Go to modem/modem.js and adjust the serial port to the one your modem is connected to & the serial port settings (or keep the defaults)
• Optionally adjust the port the server listens to in server.js
• Start the server with the following command

npm start

Debugging

To print every response line from the modem to the server console, uncomment the debug import in server.js

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Props to the original author of the serialport-gsm & node-serialport libraries + everyone involved in the chain of dependencies.