====== Documentation Camel V1 ======

----

tags: camel, camel V1

{{:products:camel:camel_2021-nov-12_16h33.png?400|}}

===== - Fichier de configuration json =====

Configuration avec communication radio en LoRa:
<file json flipper_config.json>
{
    "rtc_type": "am1805",
    "time_between_measures_s": 600,
    "number_measures_before_write_sd": 18,
    "number_writes_in_interval_file": 8,
    "lora_active": true
}
</file>

Configuration sans communication radio:
<file json flipper_config.json>
{
    "rtc_type" : "am1805",
    "time_between_measures_s" : 600,
    "number_measures_before_write_sd" : 18,
    "number_writes_in_interval_file" : 8,
    "lora_active" : false
}
</file>

===== - Manuel utilisateur =====
{{ :products:camel:camelv1_user_manual_fr.pdf |}}

===== - Javascript Codec to decode LoRaWAN frames =====

The function used to parse the bytes transmitted in LoRaWAN

<sxh javascript; first-line: 1;>
// Decode decodes an array of bytes into an object.
//  - fPort contains the LoRaWAN fPort number
//  - bytes is an array of bytes, e.g. [225, 230, 255, 0]
// The function must return an object, e.g. {"temperature": 22.5}
var TEMP_BYTE_0_IDX = 0;
var TEMP_BYTE_1_IDX = 1;
var RH_BYTE_0_IDX = 2;
var RH_BYTE_1_IDX = 3;
var VOLT_BYTE_0_IDX = 4;
var LORA_MIN_BATT_VAL = 1;
var LORA_MAX_BATT_VAL = 254;
var LORA_BATT_RANGE = LORA_MAX_BATT_VAL - LORA_MIN_BATT_VAL;
var LORA_BATT_ERROR = 255;
var BATT_VOLTAGE_LOW = 3.0;
var BATT_VOLTAGE_HIGH = 4.2;


function Decode(fPort, bytes) {

    var temperature_code = 0;
    var humidity_code = 0;
    var temperature = 0.0;
    var humidity = 0.0;
    var voltage_code = 0;
    var voltage = 0.0
    temperature_code =  (bytes[TEMP_BYTE_0_IDX] << 8 ) + bytes[TEMP_BYTE_1_IDX];
    humidity_code = (bytes[RH_BYTE_0_IDX] << 8 ) + bytes[RH_BYTE_1_IDX];
    voltage_code = bytes[VOLT_BYTE_0_IDX];
    
    temperature = ((175.72 * temperature_code) / 65536.0) - 46.85;
    humidity = ((125.0 * humidity_code) / 65536.0) - 6.0;
    var data = {};
    if (voltage_code !=  LORA_BATT_ERROR) {
        voltage = (((voltage_code - LORA_MIN_BATT_VAL) * (BATT_VOLTAGE_HIGH - BATT_VOLTAGE_LOW))/LORA_BATT_RANGE) + BATT_VOLTAGE_LOW;
        data = 
        {
            "temperature": temperature,
            "humidity": humidity,
            "voltage" : voltage,
            "raw": bytes,
        };
    }
    else {
        data = 
        {
            "temperature": temperature,
            "humidity": humidity,
            "raw": bytes,
        };
    }

    return data;
}
</sxh>