Just a clarification regarding the decrypt node

[luca-ferrari-roma]

Hi again Markus.
I have created this simple decrypting node, but, a cannot more be able to decrypt any simple payload message.

The output message is:
Network Key issue! Raw packet: Message Type = Data
PHYPayload = 4010190126006B0003DCB3C9BA1C8B494D0207EB837C2128F565E988
( PHYPayload = MHDR[1] | MACPayload[..] | MIC[4] )
MHDR = 40
MACPayload = 10190126006B0003DCB3C9BA1C8B494D0207EB837C2128
MIC = F565E988

( MACPayload = FHDR | FPort | FRMPayload )
FHDR = 10190126006B00
FPort = 03
FRMPayload = DCB3C9BA1C8B494D0207EB837C2128

( FHDR = DevAddr[4] | FCtrl[1] | FCnt[2] | FOpts[0..15] )
DevAddr = 26011910 (Big Endian)
FCtrl = 00
FCnt = 006B (Big Endian)
FOpts =
Message Type = Unconfirmed Data Up
Direction = up
FCnt = 107
FCtrl.ACK = false
FCtrl.ADR = false
FCtrl.ADRACKReq = false

Some ideas?
Thank you
Luca

Here the simple flow.
[{"id":"4a73d0d8.89431","type":"tab","label":"LoraWAN Decrypt","disabled":false,"info":""},{"id":"34a6ef3f.aaf37","type":"debug","z":"4a73d0d8.89431","name":"Decrypted","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":670,"y":480,"wires":[]},{"id":"3ca8a885.bea768","type":"function","z":"4a73d0d8.89431","name":"Extract Packet","func":"devid="12345678901 "\n\n// the lora lora-packet-converter package expect device id (12) as a string before the Lora wan Packet\nmvk=msg.payload.rxpk[0].data // from the injection \nnode.warn(mvk)\n//test={"rxpk":[{"data":"QIoaASYAYAABTqf1tMolR+Q=","time":"2019-10-16T02:43:52.558399Z","chan":0,"tmst":110465012,"stat":1,"modu":"LORA","lsnr":1,"rssi":-113,"rfch":0,"codr":"4/5","freq":903.9,"datr":"SF7BW125","size":17}]}\n//msg={}\nmsg.payload=mvk\n\nreturn msg;","outputs":1,"noerr":0,"x":220,"y":320,"wires":[["8ad92548.375908","89b28976.c54888"]]},{"id":"81099f12.8eafa","type":"inject","z":"4a73d0d8.89431","name":"LoraWAN message form pi with CPU load","props":[{"p":"payload","v":"{"rxpk":[{"tmst":361263036,"time":"2020-11-15T14:17:19.861818Z","chan":1,"rfch":0,"freq":868.300000,"stat":1,"modu":"LORA","datr":"SF9BW125","codr":"4/5","lsnr":10.0,"rssi":-49,"size":28,"data":"QBAZASYAawAD3LPJuhyLSU0CB+uDfCEo9WXpiA=="}]}","vt":"json"},{"p":"topic","v":"test message","vt":"string"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"test message","payload":"{"rxpk":[{"tmst":361263036,"time":"2020-11-15T14:17:19.861818Z","chan":1,"rfch":0,"freq":868.300000,"stat":1,"modu":"LORA","datr":"SF9BW125","codr":"4/5","lsnr":10.0,"rssi":-49,"size":28,"data":"QBAZASYAawAD3LPJuhyLSU0CB+uDfCEo9WXpiA=="}]}","payloadType":"json","x":320,"y":180,"wires":[["3ca8a885.bea768"]]},{"id":"6af837af.47c558","type":"function","z":"4a73d0d8.89431","name":"Sensor data to hex/decode","func":"\nbytes=msg.payload.out // sensor/LoraWAN data playload\n\nnewbytes=Buffer.from(bytes, 'hex')\nnode.warn(newbytes) ///yeah\n\n//decode ...payload\n//https://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nCPU_Load = (newbytes[0] << 8) | newbytes[1];\noTemperature = (newbytes[2] << 8) | newbytes[1];\n \nmsg.payload.CPU_Load = CPU_Load / 100;\nmsg.payload.oTemperature = oTemperature / 100;\n \nreturn msg;\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","outputs":1,"noerr":0,"x":700,"y":380,"wires":[["fea8e687.81dab8"]]},{"id":"d790ce78.ea957","type":"comment","z":"4a73d0d8.89431","name":"Example of Decryptin and decoding LoraWAN message","info":"Note:\nI use the APP & network key form TheThinkNetwork\n\nmy Hardware was a pycom LoPY as Single Channel Gateway\nand a Lora PI Bonnet using python\nhttps://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nI want to send the Lora Message directly via mqtt to node-red and process\nthem there with out the need of a loraWAN server\n\n\nhere a good link for testing\nhttps://lorawan-packet-decoder-0ta6puiniaut.runkit.sh\nhere more infos\nhttps://github.com/anthonykirby/lora-packet/blob/master/demo/demo1.js\nmore infos\nhttps://forum.pycom.io/topic/3958/how-decrypt-lora-data/3\nhttps://codebeautify.org/string-hex-converter","x":520,"y":40,"wires":[]},{"id":"fea8e687.81dab8","type":"debug","z":"4a73d0d8.89431","name":"Sensor Data Decoded","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":980,"y":380,"wires":[]},{"id":"8ad92548.375908","type":"debug","z":"4a73d0d8.89431","name":"InComing LoraWAN","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":480,"y":320,"wires":[]},{"id":"e9b2f33b.9c62d","type":"comment","z":"4a73d0d8.89431","name":"Example payload with CPU and temp","info":"{\n "value": "hello",\n "type": "dev",\n "msgid": 0,\n "data": {\n "rxpk": [\n {\n "data": "QIoaASYAYAABTqf1tMolR+Q=",\n "time": "2019-10-16T02:43:52.558399Z",\n "chan": 0,\n "tmst": 110465012,\n "stat": 1,\n "modu": "LORA",\n "lsnr": 1,\n "rssi": -113,\n "rfch": 0,\n "codr": "4/5",\n "freq": 903.9,\n "datr": "SF7BW125",\n "size": 17\n }\n ]\n }\n}","x":470,"y":80,"wires":[]},{"id":"2f0f1699.9ad3ba","type":"comment","z":"4a73d0d8.89431","name":"Network Key","info":"27E87B6710ACC5FB9098F19AE77DC62B","x":710,"y":80,"wires":[]},{"id":"d8b1e23c.4017b","type":"comment","z":"4a73d0d8.89431","name":"App Key","info":"B887FD00569BE0746E8020746EFC9BA8","x":700,"y":120,"wires":[]},{"id":"89b28976.c54888","type":"lorawan-packet-decrypt-nwkey-appkey","z":"4a73d0d8.89431","name":"","nsw":"27E87B6710ACC5FB9098F19AE77DC62B","asw":"B887FD00569BE0746E8020746EFC9BA8","x":410,"y":380,"wires":[["6af837af.47c558","34a6ef3f.aaf37"]]}]

[lorenzozaccomer]

I have the same issue, @luca-ferrari-roma have you solved?

[markusvankempen]

Hello @luca-ferrari-roma @lorenzozaccomer

i could not import your flow. If you use your own payload make sure to update the nwkey and appkey.
Also the message maybe still encrypted with cayennelpp and you need run it thru cayennelpp decypter?
hope that helps
Cheers

example flow

[{"id":"a74db0e0.91ab1","type":"debug","z":"ec5503c5.67d66","name":"Decrypted","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":310,"y":460,"wires":[]},{"id":"c5c58eb3.53e3e","type":"function","z":"ec5503c5.67d66","name":"Extract Packet","func":"devid="12345678901 "\n\n// the lora lora-packet-converter package expect device id (12) as a string before the Lora wan Packet\nmvk=msg.payload.data.rxpk[0].data // from the injection \nnode.warn(mvk)\n//test={"rxpk":[{"data":"QIoaASYAYAABTqf1tMolR+Q=","time":"2019-10-16T02:43:52.558399Z","chan":0,"tmst":110465012,"stat":1,"modu":"LORA","lsnr":1,"rssi":-113,"rfch":0,"codr":"4/5","freq":903.9,"datr":"SF7BW125","size":17}]}\n//msg={}\nmsg.payload=mvk\n\nreturn msg;","outputs":1,"noerr":0,"x":220,"y":320,"wires":[["cc7f2fac.17caa","7bd0e5e1.8efacc"]]},{"id":"beec1fb9.09351","type":"inject","z":"ec5503c5.67d66","name":"LoraWAN message form pi with CPU load","topic":"test message","payload":"{"value":"hello","type":"dev","msgid":0,"data":{"rxpk":[{"data":"QIoaASYAYAABTqf1tMolR+Q=","time":"2019-10-16T02:43:52.558399Z","chan":0,"tmst":110465012,"stat":1,"modu":"LORA","lsnr":1,"rssi":-113,"rfch":0,"codr":"4/5","freq":903.9,"datr":"SF7BW125","size":17}]}}","payloadType":"json","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":300,"y":260,"wires":[["c5c58eb3.53e3e"]]},{"id":"dcee074f.b269e8","type":"function","z":"ec5503c5.67d66","name":"Sensor data to hex/decode","func":"\nbytes=msg.payload.out // sensor/LoraWAN data playload\n\nnewbytes=Buffer.from(bytes, 'hex')\nnode.warn(newbytes) ///yeah\n\n//decode ...payload\n//https://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nCPU_Load = (newbytes[0] << 8) | newbytes[1];\noTemperature = (newbytes[2] << 8) | newbytes[1];\n \nmsg.payload.CPU_Load = CPU_Load / 100;\nmsg.payload.oTemperature = oTemperature / 100;\n \nreturn msg;\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","outputs":1,"noerr":0,"x":500,"y":380,"wires":[["7217258b.549fbc"]]},{"id":"6b9a2213.c47d7c","type":"comment","z":"ec5503c5.67d66","name":"Example of Decryptin and decoding LoraWAN message","info":"Note:\nI use the APP & network key form TheThinkNetwork\n\nmy Hardware was a pycom LoPY as Single Channel Gateway\nand a Lora PI Bonnet using python\nhttps://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nI want to send the Lora Message directly via mqtt to node-red and process\nthem there with out the need of a loraWAN server\n\n\nhere a good link for testing\nhttps://lorawan-packet-decoder-0ta6puiniaut.runkit.sh\nhere more infos\nhttps://github.com/anthonykirby/lora-packet/blob/master/demo/demo1.js\nmore infos\nhttps://forum.pycom.io/topic/3958/how-decrypt-lora-data/3\nhttps://codebeautify.org/string-hex-converter","x":320,"y":200,"wires":[]},{"id":"7217258b.549fbc","type":"debug","z":"ec5503c5.67d66","name":"Sensor Data Decoded","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":780,"y":380,"wires":[]},{"id":"cc7f2fac.17caa","type":"debug","z":"ec5503c5.67d66","name":"InComing LoraWAN","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":480,"y":320,"wires":[]},{"id":"da7046c8.55b788","type":"comment","z":"ec5503c5.67d66","name":"Example payload with CPU and temp","info":"{\n "value": "hello",\n "type": "dev",\n "msgid": 0,\n "data": {\n "rxpk": [\n {\n "data": "QIoaASYAYAABTqf1tMolR+Q=",\n "time": "2019-10-16T02:43:52.558399Z",\n "chan": 0,\n "tmst": 110465012,\n "stat": 1,\n "modu": "LORA",\n "lsnr": 1,\n "rssi": -113,\n "rfch": 0,\n "codr": "4/5",\n "freq": 903.9,\n "datr": "SF7BW125",\n "size": 17\n }\n ]\n }\n}","x":830,"y":200,"wires":[]},{"id":"8fc08934.101638","type":"comment","z":"ec5503c5.67d66","name":"Network Key","info":"27E87B6710ACC5FB9098F19AE77DC62B","x":750,"y":240,"wires":[]},{"id":"4954ca3.46bdf34","type":"comment","z":"ec5503c5.67d66","name":"App Key","info":"B887FD00569BE0746E8020746EFC9BA8","x":740,"y":280,"wires":[]},{"id":"7bd0e5e1.8efacc","type":"lorawan-packet-decrypt-nwkey-appkey","z":"ec5503c5.67d66","name":"Decrypt LoRaWAN","nsw":"27E87B6710ACC5FB9098F19AE77DC62B","asw":"B887FD00569BE0746E8020746EFC9BA8","x":210,"y":380,"wires":[["a74db0e0.91ab1","dcee074f.b269e8"]]},{"id":"c19d4d58.67d4c","type":"cayennelpp-decoder","z":"ec5503c5.67d66","name":"","x":480,"y":580,"wires":[["8a34ab1f.0facf8"]]},{"id":"b78dae98.1744","type":"inject","z":"ec5503c5.67d66","name":"","topic":"","payload":"016700f6017300aa01020000020200640103020402030064","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":170,"y":580,"wires":[["c19d4d58.67d4c"]]},{"id":"8a34ab1f.0facf8","type":"debug","z":"ec5503c5.67d66","name":"Decrypted","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":730,"y":580,"wires":[]}]

[lorenzozaccomer]

@markusvankempen I copied your new flow but I can't, there are some errors ...

In your original flow I use my own payload and my appkey and nwkey and I obtain the error that @luca-ferrari-roma have posted.

On the website the same datas that I used on Node-RED work perfectly.

[markusvankempen]

@lorenzozaccomer try this flow which is the org. (in the once above i added lpp decrypt https://flows.nodered.org/node/node-red-contrib-cayennelpp-extended)

here the org flow maybe use this add your payload and keys and post back here if you can

[{"id":"a74db0e0.91ab1","type":"debug","z":"ec5503c5.67d66","name":"Decrypted","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":310,"y":460,"wires":[]},{"id":"c5c58eb3.53e3e","type":"function","z":"ec5503c5.67d66","name":"Extract Packet","func":"devid="12345678901 "\n\n// the lora lora-packet-converter package expect device id (12) as a string before the Lora wan Packet\nmvk=msg.payload.data.rxpk[0].data // from the injection \nnode.warn(mvk)\n//test={"rxpk":[{"data":"QIoaASYAYAABTqf1tMolR+Q=","time":"2019-10-16T02:43:52.558399Z","chan":0,"tmst":110465012,"stat":1,"modu":"LORA","lsnr":1,"rssi":-113,"rfch":0,"codr":"4/5","freq":903.9,"datr":"SF7BW125","size":17}]}\n//msg={}\nmsg.payload=mvk\n\nreturn msg;","outputs":1,"noerr":0,"x":220,"y":320,"wires":[["cc7f2fac.17caa","7bd0e5e1.8efacc"]]},{"id":"beec1fb9.09351","type":"inject","z":"ec5503c5.67d66","name":"LoraWAN message form pi with CPU load","topic":"test message","payload":"{"value":"hello","type":"dev","msgid":0,"data":{"rxpk":[{"data":"QIoaASYAYAABTqf1tMolR+Q=","time":"2019-10-16T02:43:52.558399Z","chan":0,"tmst":110465012,"stat":1,"modu":"LORA","lsnr":1,"rssi":-113,"rfch":0,"codr":"4/5","freq":903.9,"datr":"SF7BW125","size":17}]}}","payloadType":"json","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":300,"y":260,"wires":[["c5c58eb3.53e3e"]]},{"id":"dcee074f.b269e8","type":"function","z":"ec5503c5.67d66","name":"Sensor data to hex/decode","func":"\nbytes=msg.payload.out // sensor/LoraWAN data playload\n\nnewbytes=Buffer.from(bytes, 'hex')\nnode.warn(newbytes) ///yeah\n\n//decode ...payload\n//https://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nCPU_Load = (newbytes[0] << 8) | newbytes[1];\noTemperature = (newbytes[2] << 8) | newbytes[1];\n \nmsg.payload.CPU_Load = CPU_Load / 100;\nmsg.payload.oTemperature = oTemperature / 100;\n \nreturn msg;\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","outputs":1,"noerr":0,"x":500,"y":380,"wires":[["7217258b.549fbc"]]},{"id":"6b9a2213.c47d7c","type":"comment","z":"ec5503c5.67d66","name":"Example of Decryptin and decoding LoraWAN message","info":"Note:\nI use the APP & network key form TheThinkNetwork\n\nmy Hardware was a pycom LoPY as Single Channel Gateway\nand a Lora PI Bonnet using python\nhttps://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nI want to send the Lora Message directly via mqtt to node-red and process\nthem there with out the need of a loraWAN server\n\n\nhere a good link for testing\nhttps://lorawan-packet-decoder-0ta6puiniaut.runkit.sh\nhere more infos\nhttps://github.com/anthonykirby/lora-packet/blob/master/demo/demo1.js\nmore infos\nhttps://forum.pycom.io/topic/3958/how-decrypt-lora-data/3\nhttps://codebeautify.org/string-hex-converter","x":320,"y":200,"wires":[]},{"id":"7217258b.549fbc","type":"debug","z":"ec5503c5.67d66","name":"Sensor Data Decoded","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":780,"y":380,"wires":[]},{"id":"cc7f2fac.17caa","type":"debug","z":"ec5503c5.67d66","name":"InComing LoraWAN","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":480,"y":320,"wires":[]},{"id":"da7046c8.55b788","type":"comment","z":"ec5503c5.67d66","name":"Example payload with CPU and temp","info":"{\n "value": "hello",\n "type": "dev",\n "msgid": 0,\n "data": {\n "rxpk": [\n {\n "data": "QIoaASYAYAABTqf1tMolR+Q=",\n "time": "2019-10-16T02:43:52.558399Z",\n "chan": 0,\n "tmst": 110465012,\n "stat": 1,\n "modu": "LORA",\n "lsnr": 1,\n "rssi": -113,\n "rfch": 0,\n "codr": "4/5",\n "freq": 903.9,\n "datr": "SF7BW125",\n "size": 17\n }\n ]\n }\n}","x":830,"y":200,"wires":[]},{"id":"8fc08934.101638","type":"comment","z":"ec5503c5.67d66","name":"Network Key","info":"27E87B6710ACC5FB9098F19AE77DC62B","x":750,"y":240,"wires":[]},{"id":"4954ca3.46bdf34","type":"comment","z":"ec5503c5.67d66","name":"App Key","info":"B887FD00569BE0746E8020746EFC9BA8","x":740,"y":280,"wires":[]},{"id":"7bd0e5e1.8efacc","type":"lorawan-packet-decrypt-nwkey-appkey","z":"ec5503c5.67d66","name":"Decrypt LoRaWAN","nsw":"27E87B6710ACC5FB9098F19AE77DC62B","asw":"B887FD00569BE0746E8020746EFC9BA8","x":210,"y":380,"wires":[["a74db0e0.91ab1","dcee074f.b269e8"]]}]

[lorenzozaccomer]

@markusvankempen what do you mean with .org.?
I copied that but there are some errors, I cannot import it ...

This is my version, I put my payload on data field (inject node) and my nwkey,appkey on Decrypt node.

Payload: 404A23C1AB0085010174F2F25959595D2BAC0E5D7F8B4DCFF7463930682D
Appkey: 744826b8703e23a2e6cb8d79eed484bb
Nwkey: 238792b74801de223b50ddd309b8f139

The decrypted message is: T:25:U:1566:X:111

On the bottom there's the flow, if you want to test it, the error is:
Error: Expected DevAddr to be defined

[
    {
        "id": "e3322e49.7b59f",
        "type": "tab",
        "label": "LoraWAN Decrypt",
        "disabled": false,
        "info": ""
    },
    {
        "id": "cd91624b.2fa5c",
        "type": "debug",
        "z": "e3322e49.7b59f",
        "name": "Decrypted",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "x": 310,
        "y": 460,
        "wires": []
    },
    {
        "id": "b449b928.92c388",
        "type": "function",
        "z": "e3322e49.7b59f",
        "name": "Extract Packet",
        "func": "devid=\"12345678901 \"\n\n// the lora lora-packet-converter package expect device id (12) as a string before the Lora wan Packet\nmvk=msg.payload.data.rxpk[0].data // from the injection \nnode.warn(mvk)\n//test={\"rxpk\":[{\"data\":\"QIoaASYAYAABTqf1tMolR+Q=\",\"time\":\"2019-10-16T02:43:52.558399Z\",\"chan\":0,\"tmst\":110465012,\"stat\":1,\"modu\":\"LORA\",\"lsnr\":1,\"rssi\":-113,\"rfch\":0,\"codr\":\"4/5\",\"freq\":903.9,\"datr\":\"SF7BW125\",\"size\":17}]}\n//msg={}\nmsg.payload=mvk\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 220,
        "y": 320,
        "wires": [
            [
                "a0b02dbe.69862",
                "b34f45d7.9b6328"
            ]
        ]
    },
    {
        "id": "d9a7e541.245dd8",
        "type": "inject",
        "z": "e3322e49.7b59f",
        "name": "LoraWAN message form pi  with CPU load",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "test message",
        "payload": "{\"value\":\"hello\",\"type\":\"dev\",\"msgid\":0,\"data\":{\"rxpk\":[{\"data\":\"404A23C1AB0085010174F2F25959595D2BAC0E5D7F8B4DCFF7463930682D\",\"time\":\"2019-10-16T02:43:52.558399Z\",\"chan\":0,\"tmst\":110465012,\"stat\":1,\"modu\":\"LORA\",\"lsnr\":1,\"rssi\":-113,\"rfch\":0,\"codr\":\"4/5\",\"freq\":903.9,\"datr\":\"SF7BW125\",\"size\":17}]}}",
        "payloadType": "json",
        "x": 300,
        "y": 260,
        "wires": [
            [
                "b449b928.92c388"
            ]
        ]
    },
    {
        "id": "7055b83c.074f68",
        "type": "function",
        "z": "e3322e49.7b59f",
        "name": "Sensor data to hex/decode",
        "func": "\nbytes=msg.payload.out // sensor/LoraWAN data playload\n\nnewbytes=Buffer.from(bytes, 'hex')\nnode.warn(newbytes) ///yeah\n\n//decode ...payload\n//https://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nCPU_Load = (newbytes[0] << 8) | newbytes[1];\noTemperature = (newbytes[2] << 8) | newbytes[1];\n   \nmsg.payload.CPU_Load = CPU_Load / 100;\nmsg.payload.oTemperature = oTemperature / 100;\n  \nreturn msg;\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
        "outputs": 1,
        "noerr": 0,
        "x": 500,
        "y": 380,
        "wires": [
            [
                "71678020.4fb4d"
            ]
        ]
    },
    {
        "id": "ed2894f.322f168",
        "type": "comment",
        "z": "e3322e49.7b59f",
        "name": "Example of Decryptin and decoding LoraWAN message",
        "info": "Note:\nI use the APP & network key form TheThinkNetwork\n\nmy Hardware was a pycom LoPY as Single Channel Gateway\nand a Lora PI Bonnet using python\nhttps://learn.adafruit.com/using-lorawan-and-the-things-network-with-circuitpython?view=all\n\nI want to send the Lora Message directly via mqtt to node-red and process\nthem there with out the need of a loraWAN server\n\n\nhere a good link for testing\nhttps://lorawan-packet-decoder-0ta6puiniaut.runkit.sh\nhere more infos\nhttps://github.com/anthonykirby/lora-packet/blob/master/demo/demo1.js\nmore infos\nhttps://forum.pycom.io/topic/3958/how-decrypt-lora-data/3\nhttps://codebeautify.org/string-hex-converter",
        "x": 320,
        "y": 200,
        "wires": []
    },
    {
        "id": "71678020.4fb4d",
        "type": "debug",
        "z": "e3322e49.7b59f",
        "name": "Sensor Data Decoded",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "x": 780,
        "y": 380,
        "wires": []
    },
    {
        "id": "a0b02dbe.69862",
        "type": "debug",
        "z": "e3322e49.7b59f",
        "name": "InComing LoraWAN",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "x": 480,
        "y": 320,
        "wires": []
    },
    {
        "id": "7a41cd57.b1ce94",
        "type": "comment",
        "z": "e3322e49.7b59f",
        "name": "Example payload with CPU and temp",
        "info": "{\n    \"value\": \"hello\",\n    \"type\": \"dev\",\n    \"msgid\": 0,\n    \"data\": {\n        \"rxpk\": [\n            {\n                \"data\": \"QIoaASYAYAABTqf1tMolR+Q=\",\n                \"time\": \"2019-10-16T02:43:52.558399Z\",\n                \"chan\": 0,\n                \"tmst\": 110465012,\n                \"stat\": 1,\n                \"modu\": \"LORA\",\n                \"lsnr\": 1,\n                \"rssi\": -113,\n                \"rfch\": 0,\n                \"codr\": \"4/5\",\n                \"freq\": 903.9,\n                \"datr\": \"SF7BW125\",\n                \"size\": 17\n            }\n        ]\n    }\n}",
        "x": 830,
        "y": 200,
        "wires": []
    },
    {
        "id": "a819c4e6.287908",
        "type": "comment",
        "z": "e3322e49.7b59f",
        "name": "Network Key",
        "info": "27E87B6710ACC5FB9098F19AE77DC62B",
        "x": 750,
        "y": 240,
        "wires": []
    },
    {
        "id": "f0f1f445.6237e8",
        "type": "comment",
        "z": "e3322e49.7b59f",
        "name": "App Key",
        "info": "B887FD00569BE0746E8020746EFC9BA8",
        "x": 740,
        "y": 280,
        "wires": []
    },
    {
        "id": "b34f45d7.9b6328",
        "type": "lorawan-packet-decrypt-nwkey-appkey",
        "z": "e3322e49.7b59f",
        "name": "Decrypt LoRaWAN",
        "nsw": "238792b74801de223b50ddd309b8f139",
        "asw": "744826b8703e23a2e6cb8d79eed484bb",
        "x": 210,
        "y": 380,
        "wires": [
            [
                "cd91624b.2fa5c",
                "7055b83c.074f68"
            ]
        ]
    },
    {
        "id": "798d38ee4bc21107",
        "type": "cayennelpp-decoder",
        "z": "e3322e49.7b59f",
        "name": "",
        "x": 190,
        "y": 540,
        "wires": [
            []
        ]
    }
]

[markusvankempen]

Hello @lorenzozaccomer
I found the issue - your payload needs to be in base64

404A23C1AB0085010174F2F25959595D2BAC0E5D7F8B4DCFF7463930682D (hex)
QEojwasAhQEBdPLyWVlZXSusDl1/i03P90Y5MGgt (base64)

you can convert it like
node.warn(Buffer.from("404A23C1AB0085010174F2F25959595D2BAC0E5D7F8B4DCFF7463930682D", 'hex').toString('base64'))

incoming message example with your payload

{
"value": "hello",
"type": "dev",
"msgid": 0,
"data": {
"rxpk": [
{
"data": "QEojwasAhQEBdPLyWVlZXSusDl1/i03P90Y5MGgt",
"time": "2019-10-16T02:43:52.558399Z",
"chan": 0,
"tmst": 110465012,
"stat": 1,
"modu": "LORA",
"lsnr": 1,
"rssi": -113,
"rfch": 0,
"codr": "4/5",
"freq": 903.9,
"datr": "SF7BW125",
"size": 17
}
]
}
}

and than just do a

bytes=msg.payload.out // sensor/LoraWAN data playload
newbytes=Buffer.from(bytes, 'hex') // detcrypted payload in hex
node.warn(newbytes.toString() ) /// detcrypted payload in ascii

That should do the trick ...
decode payload = "T:25:U:1566:X:111"

here the output ...

{"_msgid":"4066ca3a.d39ea4","topic":"test message","payload":{"in":"QEojwasAhQEBdPLyWVlZXSusDl1/i03P90Y5MGgt","out":"543a32353a553a313536363a583a313131","buffers":{"PHYPayload":[64,74,35,193,171,0,133,1,1,116,242,242,89,89,89,93,43,172,14,93,127,139,77,207,247,70,57,48,104,45],"MHDR":[64],"MACPayload":[74,35,193,171,0,133,1,1,116,242,242,89,89,89,93,43,172,14,93,127,139,77,207,247,70],"MACPayloadWithMIC":[74,35,193,171,0,133,1,1,116,242,242,89,89,89,93,43,172,14,93,127,139,77,207,247,70,57,48,104,45],"MIC":[57,48,104,45],"FCtrl":[0],"FOpts":[],"FHDR":[74,35,193,171,0,133,1],"DevAddr":[171,193,35,74],"FCnt":[1,133],"FPort":[1],"FRMPayload":[116,242,242,89,89,89,93,43,172,14,93,127,139,77,207,247,70]},"assci":"T:25:U:1566:X:111"}}

[lorenzozaccomer]

Thank you @markusvankempen for your replies, I solved my problem!