TEKTELIC - Finch Indoor Panic Button

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/** * ## PORTS ## * - 10: Sensor data from the MCU, battery gauge and accelerometer * - 25: Report discovered BLE devices * - 100: Response to configuration and control commands */ function Decoder(bytes, port) { const decoded = []; if (port === 10) { for (let i = 0; i < bytes.length; ) { const channel = bytes[i++]; const type = bytes[i++]; // battery status - 1byte unsigned if (channel === 0x00 && type === 0xba) { const value = bytes.readUInt8(i++); decoded.push({ variable: "battery_status_life", value: 2.5 + (value & 0x7f) * 0.01, unit: "V" }); } // acceleration alarm status - 1byte unsigned else if (channel === 0x00 && type === 0x00) { const value = bytes.readUInt8(i++); decoded.push({ variable: "acceleration_alarm", value: value === 0x00 ? 0 : 1 }); } // acceleration vector = 6bytes signed else if (channel === 0x00 && type === 0x71) { const valuex = bytes.readInt16BE(i); i += 2; const valuey = bytes.readInt16BE(i); i += 2; const valuez = bytes.readInt16BE(i); i += 2; decoded.push({ variable: "acceleration_vector_xaxis", value: valuex * 0.001, unit: "g" }); decoded.push({ variable: "acceleration_vector_yaxis", value: valuey * 0.001, unit: "g" }); decoded.push({ variable: "acceleration_vector_zaxis", value: valuez * 0.001, unit: "g" }); } // mcu temperature - 2b signed else if (channel === 0x00 && type === 0x67) { const value = bytes.readInt16BE(i); i += 2; decoded.push({ variable: "temperature", value: value * 0.1, unit: "°C" }); } } } else if (port === 25) { const type = bytes[0]; switch (type) { case 0x0a: decoded.push({ variable: "message_type", value: "basic mode" }); for (let i = 1, j = 1; i < bytes.length; j++) { const bd_addr = bytes.readUIntBE(i, 6); i += 6; const rssi = bytes.readInt8(i++); decoded.push({ variable: `bd_addr${j}`, value: bd_addr.toString(16).toUpperCase().padStart(12, "0") }); decoded.push({ variable: `rssi${j}`, value: rssi }); } break; case 0xb0: decoded.push({ variable: "message_type", value: "whitelisting mode, range 0" }); for (let i = 1, j = 1; i < bytes.length; j++) { const bd_addr_lap = bytes.readUIntBE(i, 3); i += 3; const rssi = bytes.readInt8(i++); decoded.push({ variable: `bd_addr_lap${j}`, value: bd_addr_lap.toString(16).toUpperCase().padStart(6, "0") }); decoded.push({ variable: `rssi${j}`, value: rssi }); } break; case 0xb1: decoded.push({ variable: "message_type", value: "whitelisting mode, range 1" }); for (let i = 1, j = 1; i < bytes.length; j++) { const bd_addr_lap = bytes.readUIntBE(i, 3); i += 3; const rssi = bytes.readInt8(i++); decoded.push({ variable: `bd_addr_lap${j}`, value: bd_addr_lap.toString(16).toUpperCase().padStart(6, "0") }); decoded.push({ variable: `rssi${j}`, value: rssi }); } break; case 0xb2: decoded.push({ variable: "message_type", value: "whitelisting mode, range 2" }); for (let i = 1, j = 1; i < bytes.length; j++) { const bd_addr_lap = bytes.readUIntBE(i, 3); i += 3; const rssi = bytes.readInt8(i++); decoded.push({ variable: `bd_addr_lap${j}`, value: bd_addr_lap.toString(16).toUpperCase().padStart(6, "0") }); decoded.push({ variable: `rssi${j}`, value: rssi }); } break; case 0xb3: decoded.push({ variable: "message_type", value: "whitelisting mode, range 3" }); for (let i = 1, j = 1; i < bytes.length; j++) { const bd_addr_lap = bytes.readUIntBE(i, 3); i += 3; const rssi = bytes.readInt8(i++); decoded.push({ variable: `bd_addr_lap${j}`, value: bd_addr_lap.toString(16).toUpperCase().padStart(6, "0") }); decoded.push({ variable: `rssi${j}`, value: rssi }); } break; default: break; } } return decoded; } const data = payload.find((x) => x.variable === "payload" || x.variable === "payload_raw" || x.variable === "data"); const port = payload.find((x) => x.variable === "port" || x.variable === "fport"); if (data) { const serie = data.serie || new Date().getTime(); const bytes = Buffer.from(data.value, "hex"); payload = payload.concat(Decoder(bytes, Number(port.value))).map((x) => ({ ...x, serie })); }