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Uplink messages are those sent from the sensor to the network.

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You can also refer to our Java Script payload decoder shared on the Github.

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The device has four (4) types of Uplink messages:

1. Parking status - port 1

2. Heartbeat - port 2

3. Startup - port 3

4. User Registration - port 10

The simplest method of getting occupancy status from 1 and 2 is shown in the following Java Script code example:

payload = "E91F345678"

// cut out 1st byte and convert to integer
first_byte = parseInt(payload.slice(0,2), 16)

// the sensor is occupied if 1st bit is 1
occupied = Boolean(first_byte & 0x01 === 1)

console.log("Occupied: ", occupied);

payload = [0xE9, 0x1F, 0x34, 0x56, 0x78]

// the sensor is occupied if 1st bit of the first byte is 1
occupied = Boolean(payload[0] & 0x01 === 1)

console.log("Occupied: ", occupied);

Please refer to the sections below for detailed information on message payload structure.

4.2.1 Parking status

The parking status message uses port 1 and is confirmed by default. It may be configured as unconfirmed with or without repetitions (see downlink messages).

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