47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
// Decode uplink function.
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//
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// Input is an object with the following fields:
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// - bytes = Byte array containing the uplink payload, e.g. [255, 230, 255, 0]
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// - fPort = Uplink fPort.
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// - variables = Object containing the configured device variables.
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//
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// Output must be an object with the following fields:
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// - data = Object representing the decoded payload.
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// AT configuration for Dragino RS485-BL and RS485 PM 1.0/2.5/10 sensor
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// AT+5VT=3000
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// AT+MBFUN=1
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// AT+BAUDR=9600
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// AT+COMMAND1=01 03 00 00 00 03 ,1 AT+SEARCH1=0,0 AT+DATACUT1=0,0,0 AT+CMDDL1=2000
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function decodeUplink(input) {
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var bytes = input.bytes;
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// Only accept fPort=2. Ignore fPort=4
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if(input.fPort != 2) {
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return {"data": {}};
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}
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var BatV = (bytes[0] << 8 | bytes[1]) / 1000 + 0.277;
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var PayVER = bytes[2];
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// If AT+DATAUP=1, PayloadCount=1 byte, payload#=1 byte
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var PM2_5 = bytes[3] == 0xff && bytes[4] == 0xff? -1: bytes[3] << 8 | bytes[4];
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var PM10 = bytes[5] == 0xff && bytes[6] == 0xff? -1: bytes[5] << 8 | bytes[6];
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var PM1_0 = bytes[7] == 0xff && bytes[8] == 0xff? -1: bytes[7] << 8 | bytes[8];
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return {
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data: {
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"BatV": BatV, "PM2_5": PM2_5, "PM10": PM10, "PM1_0": PM1_0
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}
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};
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}
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// Encode downlink function.
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//
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// Input is an object with the following fields:
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// - data = Object representing the payload that must be encoded.
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// - variables = Object containing the configured device variables.
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//
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// Output must be an object with the following fields:
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// - bytes = Byte array containing the downlink payload.
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function encodeDownlink(input) {
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return {bytes: []};
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}
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