TTN or ChirpStack Payload Decode Codec for the Dragino LHT65 Remote Sensor

LHT65-chirpstack-decoder.js

/* 
 * ChirpStack Payload Decode Codec for the Dragino LHT65 Remote Sensor
 * Version 0.1.0 - 2020-08-14 - Matt Rude <[email protected]>
 * 
 * *******************************************************************************
 * 
 * Copyright (c) 2020 Matt Rude <[email protected]>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * *******************************************************************************
 */

function Decode(fPort, bytes) {
  switch(fPort) {
    
    case 2:
      return {
      // External sensor
        external_sensor:
        {
            "0":"None",
            "1":"Temperature Sensor",
            "4":"Interrupt Sensor send",
            "5":"Illumination Sensor",
            "6":"ADC Sensor",
            "7":"Interrupt Sensor count",
        }[bytes[6]&0x7F],
           
        // battery, units:V
        battery:parseFloat(((bytes[0]<<8 | bytes[1]) & 0x3FFF)/1000),
           
        // SHT20, temperature, units:°C
        temperature:parseFloat(((bytes[2]<<24>>16 | bytes[3])/100).toFixed(2)),
           
        // SHT20, humidity, units:%
        humidity:parseFloat(((bytes[4]<<8 | bytes[5])/10).toFixed(1)),
           
        // DS18B20, external_temperature, units:°C
        external_temperature:
        {
        	"1":parseFloat(((bytes[7]<<24>>16 | bytes[8])/100).toFixed(2)),
        }[bytes[6]&0xFF],       
           
        // External pin level, PA4
        external_pin_level:
        {
            "4":bytes[7] ? "High":"Low",
        }[bytes[6]&0x7F], 
           
        // External pin status, PA4
        external_status:
        {
            "4":bytes[8] ? "True":"False",
        }[bytes[6]&0x7F],    
           
        // BH1750, illumination, units:lux
        external_illumination:
        {
            "5":parseFloat(bytes[7]<<8 | bytes[8]),
        }[bytes[6]&0x7F],  
        
        // ADC, PA4, units:V
        external_adc_voltage:
        {
            "6":parseFloat((bytes[7]<<8 | bytes[8])/1000),
        }[bytes[6]&0x7F],  
           
        // External count, PA4, units:times
        external_count:
        {
             "7":(bytes[7]<<8 | bytes[8]),
        }[bytes[6]&0x7F],  
            
        // Applicable to working mode 4567,and working mode 467 requires short circuit PA9 and PA10
        no_connect:
        {
             "1":"Sensor no connection",
        }[(bytes[6]&0x80)>>7],  
      };
      
    default:
      return {
        Error: "No port configured, check the upload payload file."
      };
  }
}

LHT65-ttn-decoder.js

/* 
 * TTN Payload Decode Codec for the Dragino LHT65 Remote Sensor
 * Version 0.1.0 - 2020-08-14 - Matt Rude <[email protected]>
 * 
 * *******************************************************************************
 * 
 * Copyright (c) 2020 Matt Rude <[email protected]>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * *******************************************************************************
 */
 
function Decoder(bytes, port) {

  switch(port) {
    
    case 2:
      return {
      // External sensor
        external_sensor:
        {
            "0":"None",
            "1":"Temperature Sensor",
            "4":"Interrupt Sensor send",
            "5":"Illumination Sensor",
            "6":"ADC Sensor",
            "7":"Interrupt Sensor count",
        }[bytes[6]&0x7F],
           
        // battery, units:V
        battery:parseFloat(((bytes[0]<<8 | bytes[1]) & 0x3FFF)/1000),
           
        // SHT20, temperature, units:°C
        temperature:parseFloat(((bytes[2]<<24>>16 | bytes[3])/100).toFixed(2)),
           
        // SHT20, humidity, units:%
        humidity:parseFloat(((bytes[4]<<8 | bytes[5])/10).toFixed(1)),
           
        // DS18B20, external_temperature, units:°C
        external_temperature:
        {
        	"1":parseFloat(((bytes[7]<<24>>16 | bytes[8])/100).toFixed(2)),
        }[bytes[6]&0xFF],       
           
        // External pin level, PA4
        external_pin_level:
        {
            "4":bytes[7] ? "High":"Low",
        }[bytes[6]&0x7F], 
           
        // External pin status, PA4
        external_status:
        {
            "4":bytes[8] ? "True":"False",
        }[bytes[6]&0x7F],    
           
        // BH1750, illumination, units:lux
        external_illumination:
        {
            "5":parseFloat(bytes[7]<<8 | bytes[8]),
        }[bytes[6]&0x7F],  
        
        // ADC, PA4, units:V
        external_adc_voltage:
        {
            "6":parseFloat((bytes[7]<<8 | bytes[8])/1000),
        }[bytes[6]&0x7F],  
           
        // External count, PA4, units:times
        external_count:
        {
             "7":(bytes[7]<<8 | bytes[8]),
        }[bytes[6]&0x7F],  
            
        // Applicable to working mode 4567,and working mode 467 requires short circuit PA9 and PA10
        no_connect:
        {
             "1":"Sensor no connection",
        }[(bytes[6]&0x80)>>7],  
      };
      
    default:
      return {
        Error: "No port configured, check the upload payload file."
      };
  }
}