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93 lines
3.1 KiB
JavaScript
93 lines
3.1 KiB
JavaScript
// This is for TTNv2 (deprecated)
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// configured for having no Choice of Recipient for CannedMessages
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function Decoder(bytes, port) {
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var data = {}
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function bytesToString(a) {
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return a.map(function(x){ return String.fromCharCode(x) }).join('') // because very OLD js parser
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}
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switch (port) {
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case 1: // Technical Received Acknowledgment '|5||C|'
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// 31 32 33 34 35 20
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data.type = 'ack'
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data.ack = 'recv'
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data.msgid = bytesToString(bytes.splice(0,5))
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data.rssi = bytes.splice(0,1) * 1
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break;
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case 2: // Read and Operational Acknowledgment 'AA|5|' and Operational '33|5|<CustomByte(s)>'
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// AA 31 32 33 34 35
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// operational ack with Payload "test"(maybe you should use a single byte)
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// 33 31 32 33 34 35 54 65 73 74
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data.type = 'ack'
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data.ack = bytes.splice(0,1) == 0xAA ? 'read' : 'operational'
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data.msgid = bytesToString(bytes.splice(0,5))
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if (data.ack === 'operational') {
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data.operationalData = bytesToString(bytes)
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}
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break;
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case 3: // Status & Canned Messages
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break;
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case '4': // Battery and Power Notifications
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// Startup 'FF'
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// Shutdown 'EE'
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// Low Battery 'FD'
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// ChargingOn '|V|CC'
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// ChargingOff'|V|BB'
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break;
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case 5: // OTAStatus + LoneWorker/SOS Trigger + GPS Tracking Port '|G|'
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// GPS Tracking '|G|'
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// SOS Start 'FF|G|'
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// SOS End 'FE|G|'
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// LoneWorker Lack of movement 'FD|G|'
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// LoneWorker Falldetect 'FC|G|'
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// LoneWorker End 'FB|G|'
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// OTA/PagerStatus 'FA|G||V|'
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if (bytes.length !== 9) { // we have more than just the |G| block
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if (bytes.length === 10) {
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switch(bytes[0]) {
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case 0xFF: // SOS Start
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data.type = 'sos'
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data.sos = true
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break;
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case 0xFE: // SOS End
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data.type = 'sos'
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data.sos = false
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break;
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case 0xFD: // LoneWorker Lack of movement
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data.type = 'sos'
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data.sos = false
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data.loneworker = 'lackofmovement'
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break;
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case 0xFC: // LoneWorker Falldetect
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data.type = 'sos'
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data.sos = false
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data.loneworker = 'falldetect'
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break;
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case 0xFB: // LoneWorker End
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data.type = 'sos'
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data.sos = false
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data.loneworker = false
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break;
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}
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bytes.splice(0,1)
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}
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if (bytes.length === 11) { // OTA PagerStatus
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data.type = 'ota'
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data.ota = 'status'
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data.battery = bytes[11]
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bytes.splice(0,1)
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}
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} else { // we are having a normal gps block only
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data.type = 'gps'
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}
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var gpsBlock = bytes.splice(0,9)
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data.latitude = ((gpsBlock[0]<<24)>>>0) + ((gpsBlock[1]<<16)>>>0) + ((gpsBlock[2]<<8)>>>0) + gpsBlock[3]
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data.latitude /= 10e4
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data.longitude = ((gpsBlock[4]<<24)>>>0) + ((gpsBlock[5]<<16)>>>0) + ((gpsBlock[6]<<8)>>>0) + gpsBlock[7]
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data.longitude /= 10e4
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data.lastGPSAcquisition = gpsBlock[8]
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break;
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}
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return data;
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}
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