@ncd-io/node-red-enterprise-sensors
Version:
You can install this library through the Palette Manager in Node-Red's UI.
380 lines (368 loc) • 9.51 kB
JavaScript
const { toMac, signInt, msbLsb } = require('../utils');
// --- 1. DEFINE LOCAL FUNCTIONS ---
// These are defined as local variables so they can call each other easily.
module.exports = (globalDevices) => {
const get_write_buffer_size = (firmware) => {
return 18;
};
const get_config_map = (firmware) => {
console.log('Generating sync map for firmware version', firmware);
return {
"core_version": {
"read_index": 3,
"descriptions": {
"title": "Core Version",
"main_caption": "The version of the core communication stack."
},
"validator": {
"type": "uint8"
},
"tags": [
"system"
]
},
"firmware_version": {
"read_index": 4,
"descriptions": {
"title": "Firmware Version",
"main_caption": "The application-specific firmware version."
},
"validator": {
"type": "uint8"
},
"tags": [
"system"
]
},
"sensor_type": {
"read_index": 5,
"descriptions": {
"title": "Sensor Type",
"main_caption": "The hardware identifier for the specific sensor model."
},
"validator": {
"type": "uint16be"
},
"tags": [
"system"
]
},
"tx_lifetime_counter": {
"read_index": 7,
"descriptions": {
"title": "Sampling Interval",
"main_caption": "Set how often will the sensor transmit measurement data. Note: For this sensor, this value functions as the sampling interval rather than a traditional delay.",
"sub_caption": "Default value: 20 milliseconds."
},
"validator": {
"type": "uint32be"
},
"tags": [
"diagnostics"
]
},
"hardware_id": {
"read_index": 11,
"length": 3,
"descriptions": {
"title": "Hardware ID",
"main_caption": "A unique 3-byte hardware identifier."
},
"validator": {
"type": "buffer"
},
"tags": [
"system"
]
},
"network_id": {
"read_index": 14,
"write_index": 3,
"length": 2,
"descriptions": {
"title": "Network ID",
"main_caption": ""
},
"default_value": "7fff",
"validator": {
"type": "hex",
"length": 4
},
"html_id": "pan_id",
"tags": [
"communications"
]
},
"destination_address": {
"read_index": 16,
"write_index": 5,
"length": 4,
"descriptions": {
"title": "Destination Address",
"main_caption": ""
},
"default_value": "0000ffff",
"validator": {
"type": "mac",
"length": 8
},
"html_id": "destination",
"tags": [
"communications"
]
},
"node_id": {
"read_index": 20,
"write_index": 9,
"descriptions": {
"title": "Node ID",
"main_caption": ""
},
"default_value": "0",
"validator": {
"type": "uint8",
"min": 0,
"max": 255,
"generated": true
},
"html_id": "node_id",
"tags": [
"generic"
]
},
"report_rate": {
"read_index": 21,
"write_index": 10,
"descriptions": {
"title": "Delay",
"main_caption": ""
},
"default_value": 3,
"validator": {
"type": "uint32be"
},
"html_id": "delay"
},
"sensor_interface_ch1": {
"read_index": 25,
"write_index": 14,
"descriptions": {
"title": "Set RTD Wire Type",
"main_caption": "The wire type of RTD Sensor Probe to be connected."
},
"default_value": 0,
"validator": {
"type": "uint8",
"min": 0,
"max": 2,
"generated": true
},
"options": {
"0": "2 Wires",
"1": "3 Wires",
"2": "4 Wires"
},
"html_id": "rtd_type_39"
},
"sensor_range_ch1": {
"read_index": 26,
"write_index": 15,
"descriptions": {
"title": "Set RTD Range",
"main_caption": "Type of PT Sensor Probe to be connected."
},
"default_value": 0,
"validator": {
"type": "uint8",
"min": 0,
"max": 1,
"generated": true
},
"options": {
"0": "PT 100",
"1": "PT 1000"
},
"html_id": "rtd_range_39"
},
"sensor_interface_ch2": {
"read_index": 25,
"write_index": 16,
"descriptions": {
"title": "Set RTD Wire Type - Channel 2",
"main_caption": "The wire type of RTD Sensor Probe to be connected in Channel 2."
},
"default_value": 0,
"validator": {
"type": "uint8",
"min": 0,
"max": 2,
"generated": true
},
"options": {
"0": "2 Wires",
"1": "3 Wires",
"2": "4 Wires"
},
"html_id": "rtd_wire_type_ch2_54"
},
"sensor_range_ch2": {
"read_index": 26,
"write_index": 17,
"descriptions": {
"title": "Set RTD Range - Channel 2",
"main_caption": "Type of PT Sensor Probe to be connected in Channel 2."
},
"default_value": 0,
"validator": {
"type": "uint8",
"min": 0,
"max": 1,
"generated": true
},
"options": {
"0": "PT 100",
"1": "PT 1000"
},
"html_id": "rtd_range_ch2_54"
}
};
};
const sync_parse = (rep_buffer) => {
let response = {
'human_readable': {},
'machine_values': {}
};
// Get the map based on the sensor type byte
const sync_map = get_config_map(rep_buffer[4]);
for (const [key, config] of Object.entries(sync_map)) {
// Destructure 'type' from inside 'validator' and rename 'read_index' to 'idx'
const { read_index: idx, length, validator: { type } = {}, converter, options } = config;
// If for some reason a config doesn't have a validator/type, skip it
if (!type) continue;
switch (type) {
case 'uint8':
response.machine_values[key] = rep_buffer[idx];
break;
case 'uint16be':
response.machine_values[key] = rep_buffer.readUInt16BE(idx);
break;
case 'uint32be':
response.machine_values[key] = rep_buffer.readUInt32BE(idx);
break;
case 'buffer':
response.machine_values[key] = rep_buffer.subarray(idx, idx + length);
break;
case 'hex':
response.machine_values[key] = rep_buffer.subarray(idx, idx + length).toString('hex');
break;
case 'mac':
response.machine_values[key] = rep_buffer.subarray(idx, idx + length).toString('hex');
break;
}
let human_value = response.machine_values[key];
if(options && options[response.machine_values[key]]){
human_value = options[response.machine_values[key]];
}else{
if(converter && converter.multiplier){
human_value = human_value * converter.multiplier;
}
if(converter && converter.units){
human_value = human_value + converter.units;
}
}
response.human_readable[key] = human_value;
}
if (Object.hasOwn(response.machine_values, 'destination_address') && response.machine_values.destination_address.toLowerCase() === '00000000') {
console.log('##############################');
console.log('#########Dest Override########');
console.log('##############################');
response.destination_address = "0000ffff";
};
return response;
};
const parse_fly = (frame) => {
let firmware = frame[2];
if(firmware > 5){
const interface_types = ["rtd_2_wire", "rtd_3_wire", "rtd_4_wire"];
const rtd_types = ["rtd_pt_100", "rtd_pt_1000"];
return {
'firmware': frame[2],
'sensor_interface_ch1': interface_types[frame[12]],
'sensor_type_ch1': rtd_types[frame[13]],
'sensor_interface_ch2': interface_types[frame[14]],
'sensor_type_ch2': rtd_types[frame[15]],
'hardware_id': frame.slice(16, 19),
'report_rate': frame.slice(19, 23).reduce(msbLsb) + " sec",
'tx_life_counter': frame.slice(23, 27).reduce(msbLsb),
'machine_values': {
'firmware': frame[2],
'sensor_interface_ch1': frame[12],
'sensor_type_ch1': frame[13],
'sensor_interface_ch2': frame[14],
'sensor_type_ch2': frame[15],
'hardware_id': frame.slice(16, 19),
'report_rate': frame.slice(19, 23),
'tx_life_counter': frame.slice(23, 27)
}
}
}
};
const parse = (payload, parsed, mac) => {
if(parsed.firmware > 5){
let reserved = payload[7] >> 1; // Fault status (1-bit left shifted)
let fault_status = '';
if (reserved === 0) {
fault_status = 'data_valid';
} else if (reserved === 15) {
fault_status = 'data_invalid';
} else {
const fault_bits = (reserved >> 2) & 0b00001111;
switch (fault_bits) {
case 8:
fault_status = 'ref_in_vbias';
break;
case 4:
fault_status = 'ref_in_force_close';
break;
case 2:
fault_status = 'rtd_in_force_open';
break;
case 1:
fault_status = 'over_under_voltage';
break;
}
const channel_bits = reserved & 0b00000011;
switch (channel_bits) {
case 1:
fault_status = fault_status + '_ch1';
break;
case 2:
fault_status = fault_status + '_ch2';
break;
}
}
return {
fault_status: fault_status,
temperature_1: signInt(payload.slice(8, 12).reduce(msbLsb), 32) / 100,
temperature_2: signInt(payload.slice(12, 16).reduce(msbLsb), 32) / 100
};
} else {
return {
temperature_1: signInt(payload.slice(8, 12).reduce(msbLsb), 32) / 100,
temperature_2: signInt(payload.slice(12, 16).reduce(msbLsb), 32) / 100
};
}
};
// --- 2. EXPORT THE MODULE ---
// Export the module with all the necessary functions and properties
// that need to be called from outside the scrip
return {
type: 54,
name: '2-Channel RTD Temperature Sensor',
parse,
get_write_buffer_size,
get_config_map,
sync_parse,
parse_fly
};
};