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@sanchox
Created Apr 29, 2020
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ChirpStack JS decoder for VEGA TS-11 (https://en.iotvega.com/product/tester) payloads
// 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]
// - variables contains the device variables e.g. {"calibration": "3.5"} (both the key / value are of type string)
// The function must return an object, e.g. {"temperature": 22.5}
function Decode(fPort, bytes, variables) {
output = {}
if (fPort == 4) {
flag_bits = bytes[0].toString(2).split('').reverse()
if (flag_bits[0] == 1) {
output.rssi = -bytes[5]
output.snr = bytes[6] > 127 ? bytes[6] - 256 : bytes[6]
}
if (flag_bits[1] == 1) {
output.battery_voltage_mV = (bytes[3] << 8) + bytes[4]
}
if (flag_bits[2] == 1) {
output.downlink_packet_count = bytes[2]
}
if (flag_bits[3] == 1) {
output.uplink_packet_count = bytes[1]
}
if (flag_bits[4] == 1) {
output.navigation_data_available = true
}
if (flag_bits[5] == 1) {
output.send_by_timer_event = false
output.send_by_button_press_event = true
} else {
output.send_by_timer_event = true
output.send_by_button_press_event = false
}
if (flag_bits[6] == 1) {
output.temperature_data_available = true
}
}
return output
}
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