Salut à tous,
J’aimerais pouvoir decoder une trame d’un capteur Bluetooth.
J’ai mis en service un shelly avec bluetooth et un sript qui va bien comme celui-ci:
/**
* This script uses the BLE scan functionality in scripting
* Selects Shelly BLU DoorWindow from the aired advertisements, decodes
* the service data payload and toggles a relay on the device on
* button push
*/
// Shelly BLU devices:
// SBBT - Shelly BLU Button
// SBDW - Shelly BLU DoorWindow
// sample Shelly DW service_data payload
// 0x40 0x00 0x4E 0x01 0x64 0x05 0x00 0x00 0x00 0x2D 0x01 0x3F 0x00 0x00
// First byte: BTHome device info, 0x40 - no encryption, BTHome v.2
// bit 0: “Encryption flag”
// bit 1-4: “Reserved for future use”
// bit 5-7: “BTHome Version”
// AD 0: PID, 0x00
// Value: 0x4E
// AD 1: Battery, 0x01
// Value, 100%
// AD 2: Illuminance, 0x05
// Value: 0
// AD 3: Window, 0x2D
// Value: true, open
// AD 4: Rotation, 0x3F
// Value: 0
// Device name can be obtained if an active scan is performed
// You can rely only on the addresss filtering and forego device name matching
// CHANGE HERE
function triggerAutomation() {
print("Window is opened, will toggle the output");
Shelly.call("Switch.Set", { id: 0, on: true });
}
function printClosed() {
print("Window is opened, will toggle the output");
Shelly.call("Switch.Set", { id: 0, on: false });
}
// remove name prefix to not filter by device name
// remove address to not filter by address
let CONFIG = {
//shelly_blu_name_prefix: 'SBDW',
//"BIND" to only this address
shelly_blu_address: "bc:02:6e:c3:c9:0f",
actions: [
{
cond: {
Window: 0,
},
action: triggerAutomation,
},
{
cond: {
Window: 1,
},
action: printClosed,
},
],
};
// END OF CHANGE
let ALLTERCO_MFD_ID_STR = "0ba9";
let BTHOME_SVC_ID_STR = "fcd2";
let ALLTERCO_MFD_ID = JSON.parse("0x" + ALLTERCO_MFD_ID_STR);
let BTHOME_SVC_ID = JSON.parse("0x" + BTHOME_SVC_ID_STR);
let SCAN_DURATION = BLE.Scanner.INFINITE_SCAN;
let ACTIVE_SCAN =
typeof CONFIG.shelly_blu_name_prefix !== "undefined" &&
CONFIG.shelly_blu_name_prefix !== null;
let uint8 = 0;
let int8 = 1;
let uint16 = 2;
let int16 = 3;
let uint24 = 4;
let int24 = 5;
function getByteSize(type) {
if (type === uint8 || type === int8) return 1;
if (type === uint16 || type === int16) return 2;
if (type === uint24 || type === int24) return 3;
//impossible as advertisements are much smaller;
return 255;
}
let BTH = [];
BTH[0x00] = { n: "pid", t: uint8 };
BTH[0x01] = { n: "Battery", t: uint8, u: "%" };
BTH[0x05] = { n: "Illuminance", t: uint24, f: 0.01 };
BTH[0x1a] = { n: "Door", t: uint8 };
BTH[0x20] = { n: "Moisture", t: uint8 };
BTH[0x2d] = { n: "Window", t: uint8 };
BTH[0x3a] = { n: "Button", t: uint8 };
BTH[0x3f] = { n: "Rotation", t: int16, f: 0.1 };
let BTHomeDecoder = {
utoi: function (num, bitsz) {
let mask = 1 << (bitsz - 1);
return num & mask ? num - (1 << bitsz) : num;
},
getUInt8: function (buffer) {
return buffer.at(0);
},
getInt8: function (buffer) {
return this.utoi(this.getUInt8(buffer), 8);
},
getUInt16LE: function (buffer) {
return 0xffff & ((buffer.at(1) << 8) | buffer.at(0));
},
getInt16LE: function (buffer) {
return this.utoi(this.getUInt16LE(buffer), 16);
},
getUInt24LE: function (buffer) {
return (
0x00ffffff & ((buffer.at(2) << 16) | (buffer.at(1) << 8) | buffer.at(0))
);
},
getInt24LE: function (buffer) {
return this.utoi(this.getUInt24LE(buffer), 24);
},
getBufValue: function (type, buffer) {
if (buffer.length < getByteSize(type)) return null;
let res = null;
if (type === uint8) res = this.getUInt8(buffer);
if (type === int8) res = this.getInt8(buffer);
if (type === uint16) res = this.getUInt16LE(buffer);
if (type === int16) res = this.getInt16LE(buffer);
if (type === uint24) res = this.getUInt24LE(buffer);
if (type === int24) res = this.getInt24LE(buffer);
return res;
},
unpack: function (buffer) {
// beacons might not provide BTH service data
if (typeof buffer !== "string" || buffer.length === 0) return null;
let result = {};
let _dib = buffer.at(0);
result["encryption"] = _dib & 0x1 ? true : false;
result["BTHome_version"] = _dib >> 5;
if (result["BTHome_version"] !== 2) return null;
//Can not handle encrypted data
if (result["encryption"]) return result;
buffer = buffer.slice(1);
let _bth;
let _value;
while (buffer.length > 0) {
_bth = BTH[buffer.at(0)];
if (_bth === "undefined") {
console.log("BTH: unknown type");
break;
}
buffer = buffer.slice(1);
_value = this.getBufValue(_bth.t, buffer);
if (_value === null) break;
if (typeof _bth.f !== "undefined") _value = _value * _bth.f;
result[_bth.n] = _value;
buffer = buffer.slice(getByteSize(_bth.t));
}
return result;
},
};
let ShellyBLUParser = {
getData: function (res) {
let result = BTHomeDecoder.unpack(res.service_data[BTHOME_SVC_ID_STR]);
result.addr = res.addr;
result.rssi = res.rssi;
return result;
},
};
let last_packet_id = 0x100;
function scanCB(ev, res) {
if (ev !== BLE.Scanner.SCAN_RESULT) return;
// skip if there is no service_data member
if (
typeof res.service_data === "undefined" ||
typeof res.service_data[BTHOME_SVC_ID_STR] === "undefined"
)
return;
// skip if we are looking for name match but don't have active scan as we don't have name
if (
typeof CONFIG.shelly_blu_name_prefix !== "undefined" &&
(typeof res.local_name === "undefined" ||
res.local_name.indexOf(CONFIG.shelly_blu_name_prefix) !== 0)
)
return;
// skip if we don't have address match
if (
typeof CONFIG.shelly_blu_address !== "undefined" &&
CONFIG.shelly_blu_address !== res.addr
)
return;
let BTHparsed = ShellyBLUParser.getData(res);
// skip if parsing failed
if (BTHparsed === null) {
console.log("Failed to parse BTH data");
return;
}
// skip, we are deduping results
if (last_packet_id === BTHparsed.pid) return;
last_packet_id = BTHparsed.pid;
console.log("Shelly BTH packet: ", JSON.stringify(BTHparsed));
// execute actions from CONFIG
let aIdx = null;
for (aIdx in CONFIG.actions) {
// skip if no condition defined
if (typeof CONFIG.actions[aIdx]["cond"] === "undefined") continue;
let cond = CONFIG.actions[aIdx]["cond"];
let cIdx = null;
let run = true;
for (cIdx in cond) {
if (typeof BTHparsed[cIdx] === "undefined") run = false;
if (BTHparsed[cIdx] !== cond[cIdx]) run = false;
}
// if all conditions evaluated to true then execute
if (run) CONFIG.actions[aIdx]["action"](BTHparsed);
}
}
BLE.Scanner.Start({ duration_ms: SCAN_DURATION, active: ACTIVE_SCAN }, scanCB);
Ca marche nickel.
Mais je n’ai pas envie d’acheter plusieurs shelly pour mettre chez moi donc je me suis dit pourquoi pas utiliser ma cle sena . J’ai reussi avec TheengsGateway à avoir cettre trame :
{"servicedatauuid": "fcd2", "servicedata": "4400e60164052003002d013f3800", "manufacturerdata": "a90b0101000b02000a509e40abef60", "name": "SBDW-002C", "id": "60:EF:AB:40:9E:50", "rssi": -54, "mfr": "Allterco Robotics ltd"}
Quelqu’un serait-il capable de me transformer ca en un script qui va bien.
Du style je remonte le service data dans Jmqtt et je sors les infos.
Je fais des testes mais absolument rien de convaincant étant un noob en programmation.
Merci de votre aide.