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@vladaman
Created April 8, 2020 13:18
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EFTPOS - Protocol test connection V. 3.00 (revision:07) - https://en.wikipedia.org/wiki/EFTPOS - simple test to communicate with MyPAX S800 Terminal
var net = require('net');
var HOST = '192.168.9.111';
var PORT = 20008;
const STX = 0x02; // Start transaction
const ETX = 0x03; // End transaction
const SEP = 0x1C; // Field separator
var client = new net.Socket();
client.connect(PORT, HOST, function() {
console.log('CONNECTED TO: ' + HOST + ':' + PORT);
let str = "POST03S00A234567890123456KSTEST06 123412340000";
let c = Buffer.from(str);
let msg = Buffer.concat([c, Buffer.from([ETX])]);
let d = Buffer.concat([Buffer.from([STX]), msg]);
let lrcByte = calculateLRC(msg);
let payload = Buffer.concat([d, Buffer.from([lrcByte])]);
console.log(payload.toString('hex'));
client.write(payload);
});
// Add a 'data' event handler for the client socket
// data is what the server sent to this socket
client.on('data', function(data) {
console.log('DATA RESPONSE: ', data.toString('hex'));
// Close the client socket completely
client.destroy();
});
// Add a 'close' event handler for the client socket
client.on('close', function() {
console.log('Connection closed');
});
function calculateLRC(bytes) {
var lrc = 0;
for (var i = 0; i < bytes.length; i++) {
lrc ^= bytes[i];
}
return lrc;
}
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