TTN Smart Sensor (Digital-Matter)

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function PrintHex(bytes, offset, length) { var output = ""; for (var i = offset; i < offset + length; i++) { var s = bytes[i].toString(16); while (s.length < 2) s = "0" + s; if (output.length === 0) output = output + s; else output = output + s; } return output; } function MakeBitParser(bytes, offset, length) { return { bits: bytes.slice(offset, offset + length), offset: 0, bitLength: length * 8, U32LE: function U32LE(bits) { if (bits > 32) throw ("Invalid argument!"); if (this.offset + bits > this.bitLength) throw ("Read past end of data!"); var out = 0; var total = 0; while (bits > 0) { var byteNum = Math.floor(this.offset / 8); var discardLSbs = this.offset & 7; var avail = Math.min(8 - discardLSbs, bits); var extracted = (this.bits[byteNum] >>> discardLSbs); var masked = (extracted << (32 - avail)) >>> (32 - avail); out |= ((masked << total) >>> 0); total += avail; bits -= avail; this.offset += avail; } return out; }, S32LE: function S32LE(bits) { return (this.U32LE(bits) << (32 - bits)) >> (32 - bits); } }; } function decodeUplink(input) { var p = input.fPort; var b = MakeBitParser(input.bytes, 0, input.bytes.length); var d = {}; if (p === 1) { d._type = "hello"; d.fwMaj = b.U32LE(8); d.fwMin = b.U32LE(8); d.prodId = b.U32LE(8); d.hwRev = b.U32LE(8); d.resetPowerOn = (b.U32LE(1) !== 0); d.resetWatchdog = (b.U32LE(1) !== 0); d.resetExternal = (b.U32LE(1) !== 0); d.resetSoftware = (b.U32LE(1) !== 0); b.U32LE(4); d.watchdogReason = b.U32LE(16); d.initialBatV = Number((2.0 + 0.007 * b.U32LE(8)).toFixed(2)); d.lrHw = b.U32LE(8); d.lrMaj = b.U32LE(8); d.lrMin = b.U32LE(8); } else if (p === 2) { d._type = "downlink ack"; d.sequence = b.U32LE(7); d.accepted = (b.U32LE(1) !== 0); d.fwMaj = b.U32LE(8); d.fwMin = b.U32LE(8); d.prodId = b.U32LE(8); d.hwRev = b.U32LE(8); d.port = b.U32LE(8); d.lrHw = b.U32LE(8); d.lrMaj = b.U32LE(8); d.lrMin = b.U32LE(8); } else if (p === 3) { d._type = "stats"; d.initialBatV = Number((2.0 + 0.007 * b.U32LE(8)).toFixed(3)); d.BatVMax = Number((2.0 + 0.007 * b.U32LE(8)).toFixed(3)); d.wakeupsPerTrip = b.U32LE(8); d.tripCount = 32 * b.U32LE(14); d.uptimeWeeks = b.U32LE(10); d.mAhUsed = 2 * b.U32LE(10); d.percentLora = 100 / 64 * b.U32LE(6); d.percentGnss = 100 / 64 * b.U32LE(6); d.percentWifi = 100 / 64 * b.U32LE(6); d.percentSleep = 100 / 64 * b.U32LE(6); d.percentDisch = 100 / 64 * b.U32LE(6); d.percentOther = 100 - d.percentLora - d.percentGnss - d.percentWifi - d.percentSleep - d.percentDisch; } else if (p === 5) { d._type = "location"; wifiCount = b.U32LE(5); d.inTrip = (b.U32LE(1) !== 0); d.inactive = (b.U32LE(1) !== 0); b.U32LE(3); d.timeSet = (b.U32LE(1) !== 0); d.posSeq = b.U32LE(5); d.wifi = []; for (var i = 0; i < wifiCount; i++) { var rssi = b.bits[2 + i * 7 + 0]; if (rssi >= 128) rssi -= 256; var mac = PrintHex(b.bits, 2 + i * 7 + 1, 6); d.wifi[i] = { rssi: rssi, mac: mac }; } var navBytes = b.bits.slice(2 + wifiCount * 7); if (navBytes.length > 0) { d.nav = PrintHex(navBytes, 0, navBytes.length); } } else if (p == 89) { d._type = "connect"; d.id = PrintHex(b.bits, 0, 6); d.devReset = ((b.bits[6] & 1) !== 0); d.fcntReset = ((b.bits[6] & 2) !== 0); d.fwMaj = b.bits[7]; d.fwMin = b.bits[8]; d.prodId = b.bits[9]; d.hwRev = b.bits[10]; } else if (p == 90) { d._type = "mtu advice"; d.mtu0 = b.U32LE(6); d.mtu1 = b.U32LE(7); d.mtu2 = b.U32LE(7); d.mod1 = b.U32LE(4); d.mod2 = b.U32LE(4); d.mod3 = b.U32LE(4); d.seq = b.U32LE(16); } else if (p == 91) { d._type = "alm cookie req"; d.baseTime = b.U32LE(16); d.baseCrc = "0x" + b.U32LE(16).toString(16); d.codeMask = b.U32LE(8); d.compMask = b.U32LE(8); d.lrHw = b.U32LE(8); d.lrMaj = b.U32LE(8); d.lrMin = b.U32LE(8); } else if (p == 92) { d._type = "alm chunk req"; d.offset = b.U32LE(15); d.count = b.U32LE(13); d.cookie = b.U32LE(4); } else if ((p >= 101) && (p <= 116)) { d._type = "fragments"; d.frameId = p - 101 + 16 * b.U32LE(4); d.total = b.U32LE(5) + 1; d.offset = b.U32LE(7); d.data = PrintHex(b.bits, 2, b.bits.length - 2); if (d.offset == 0) { d.port = b.bits[7]; d.size = d.total * 9 - b.U32LE(4); } } else if (p == 202) { d._type = "time req"; if ((b.bits.length == 6) && (b.U32LE(8) == 0x01)) { d.gpsTime = b.U32LE(32); d.token = b.U32LE(4); d.ansReq = (b.U32LE(1) !== 0); } } else { return { warnings: ['unknown FPort'], }; } return { data: d, }; }