We are having issues with data not being relayed across the mesh network.
BACKGROUND
Here is some background information on the project.
The device is an industrial IoT sensor that uses Bluetooth Mesh to relay data to a Gateway device. The Gateway writes the data to a time series database for later analysis.
We started by using the mesh sensor example. We then expanded the number of bytes transmitted in the example code. Initially we used 20 bytes, now we use 24.
The sensor node records multiple data points and populates the "p_out" array defined in the Nordic mesh sensor example. The array is automatically formatted as a Bluetooth mesh message by the SDK and is transmitted across the network.
We changed the default TTL in the example code from 15 to 5. The transmit power is set to +8dB.
We have tried two different mesh setups. In one, each sensor node publishes to a single unicast address (the gateway). In the other, each node publishes to a group and the gateway subscribes to that group. Also, we have integrated a closed source data processing library from Bosch Sensortec (BSEC) which processes some sensor data before the messages are sent.
Initially, we were using a Waveshare Development kit for each node, but now we are using our own PCB design that incorporates an Ebyte E73-2G4M08S1C BT module. The gateway device is still a Waveshare development kit board.
PROBLEMS
We are experiencing two different (but we suspect related) issues.
ISSUE #1:
Data is not being relayed reliably. We have seen two different behaviors (one on site at our developer's, one on site here) but have not been able to isolate the cause of the difference.
In case 1, when any node is out of range of the base station, it's data will not be arrive at the gateway. nRFMesh reports that "relay" is enabled. The node will send data without issue when in range of the gateway, but its data does not get relayed if it is within range of another node but out of range of the gateway. The nodes in this mesh are set with retransmit = 3, and the transmit interval for the message broadcast timing is 10s.
In case 2, data sometimes gets relayed, but the behavior is not consistent or reliable.
ISSUE #2 (paired with case 1)
If I attempt to change settings using nRFMesh, I cannot change settings for nodes that are out of range of the device I use for provisioning. I have to physically move closer to the device and connect nRFMesh to that specific device.
We are using the Android version of nRFMesh for provisioning (v3.1.6).
nRFMesh profiles from the two different mesh networks (our developer and mine) are below.
CASE 1:
{
"$schema": "http://json-schema.org/draft-04/schema#",
"id": "http://www.bluetooth.com/specifications/assigned-numbers/mesh-profile/cdb-schema.json#",
"version": "1.0.0",
"meshUUID": "533EC1F9-015C-404F-8979-F75A04CB7525",
"meshName": "nRF Mesh Network",
"timestamp": "2021-06-07T14:48:28-04:00",
"partial": false,
"netKeys": [
{
"name": "Network Key 1",
"index": 0,
"key": "1D302E47F46621ECCDA3E0AB1735E565",
"phase": 0,
"minSecurity": "insecure",
"timestamp": "2021-06-07T12:22:06-04:00"
}
],
"appKeys": [
{
"name": "Application Key 1",
"index": 0,
"boundNetKey": 0,
"key": "61AA9C33FDCD9484EEC87DB0A0311076"
},
{
"name": "Application Key 2",
"index": 1,
"boundNetKey": 0,
"key": "E13FDDB390685F599A27C8991DDC2395"
},
{
"name": "Application Key 3",
"index": 2,
"boundNetKey": 0,
"key": "F1F668DC96E20AC9DAA960B42D31FB37"
}
],
"provisioners": [
{
"provisionerName": "nRF Mesh Provisioner",
"UUID": "B40CF49B-6333-4FC5-B36F-4889E17E4DC1",
"allocatedUnicastRange": [
{
"lowAddress": "0001",
"highAddress": "199A"
}
],
"allocatedGroupRange": [
{
"lowAddress": "C000",
"highAddress": "CC9A"
}
],
"allocatedSceneRange": [
{
"firstScene": "0001",
"lastScene": "3333"
}
]
}
],
"nodes": [
{
"UUID": "B40CF49B-6333-4FC5-B36F-4889E17E4DC1",
"name": "nRF Mesh Provisioner",
"deviceKey": "4A89FD09D846ADEC3065138D786E30D3",
"unicastAddress": "0001",
"security": "insecure",
"configComplete": true,
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 2,
"relay": 2
},
"defaultTTL": 5,
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
},
{
"index": 1,
"updated": false
},
{
"index": 2,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0001",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0001",
"bind": [],
"subscribe": []
}
]
}
],
"excluded": false
},
{
"UUID": "3A7AD8F9-4C5F-45E0-98AC-8580EBF9835C",
"name": "AC:D8 | Gateway 002",
"deviceKey": "06C583603DF413580C01D7D0D2628B2D",
"unicastAddress": "0002",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 40,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0002",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
}
]
},
{
"name": "Element: 0x0003",
"index": 1,
"location": "0000",
"models": [
{
"modelId": "1102",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "C010",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 0,
"resolution": 100
},
"retransmit": {
"count": 3,
"interval": 100
},
"credentials": 0
}
}
]
},
{
"name": "Element: 0x0004",
"index": 2,
"location": "0000",
"models": [
{
"modelId": "1102",
"bind": [],
"subscribe": []
}
]
}
],
"excluded": false
},
{
"UUID": "0BE911BD-0CCA-48F5-8AB6-14E66ADA663D",
"name": "B6:0A | Sensor 005",
"deviceKey": "A12C0C5F56C74994BC70EABDD1ED56BE",
"unicastAddress": "0005",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 5,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0005",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 1000
},
"retransmit": {
"count": 3,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C010"
]
}
]
}
],
"excluded": false
},
{
"UUID": "9CCC2791-5A3B-4455-903C-8B63F9C66906",
"name": "3C:10 | Sensor 006",
"deviceKey": "C4896A346D6FBBAFF01E8B61FF5E41BD",
"unicastAddress": "0006",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 5,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0006",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 1000
},
"retransmit": {
"count": 3,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C010"
]
}
]
}
],
"excluded": false
},
{
"UUID": "A543C586-0FB0-49A6-ADD6-E3F12067C1FA",
"name": "D6:ED | Sensor 007",
"deviceKey": "405D6468086C1D786A8DB2DA5C82AD01",
"unicastAddress": "0007",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 5,
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0007",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 1000
},
"retransmit": {
"count": 3,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C010"
]
}
]
}
],
"excluded": false
},
{
"UUID": "2CF17CCA-F8EB-403D-9E8B-B8C1A060AF7A",
"name": "8B:DE Sensor 008",
"deviceKey": "DE5400C62131AAB749BB9F48ED1E01C9",
"unicastAddress": "0008",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 5,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0008",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 1000
},
"retransmit": {
"count": 3,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C010"
]
}
]
}
],
"excluded": false
}
],
"groups": [
{
"name": "SensorData",
"address": "C000",
"parentAddress": "0000"
},
{
"name": "TimeSync",
"address": "C010",
"parentAddress": "0000"
}
],
"scenes": [],
"networkExclusions": []
}
CASE 2:
{
"$schema": "http://json-schema.org/draft-04/schema#",
"id": "http://www.bluetooth.com/specifications/assigned-numbers/mesh-profile/cdb-schema.json#",
"version": "1.0.0",
"meshUUID": "983CE91B-414E-4D96-BDB1-5969DB5C03B3",
"meshName": "nRF Mesh Network",
"timestamp": "2021-06-28T16:06:57+05:00",
"partial": false,
"netKeys": [
{
"name": "Network Key 1",
"index": 0,
"key": "40CBF89E2BFE863A5E4658645751B734",
"phase": 0,
"minSecurity": "insecure",
"timestamp": "2021-02-13T17:23:41+05:00"
}
],
"appKeys": [
{
"name": "Application Key 1",
"index": 0,
"boundNetKey": 0,
"key": "D2FD66073905935CC0976D10FEF0A2E0"
},
{
"name": "Application Key 2",
"index": 1,
"boundNetKey": 0,
"key": "6DEFA24ACC8E8AC35DBDC5EE7F645883"
},
{
"name": "Application Key 3",
"index": 2,
"boundNetKey": 0,
"key": "BCD694C61CD3E63FC3C7D62D352B9E2C"
}
],
"provisioners": [
{
"provisionerName": "nRF Mesh Provisioner",
"UUID": "9C81581D-6AC0-4266-8796-DDEC3B4A7F3E",
"allocatedUnicastRange": [
{
"lowAddress": "0001",
"highAddress": "199A"
}
],
"allocatedGroupRange": [
{
"lowAddress": "C000",
"highAddress": "CC9A"
}
],
"allocatedSceneRange": [
{
"firstScene": "0001",
"lastScene": "3333"
}
]
}
],
"nodes": [
{
"UUID": "9C81581D-6AC0-4266-8796-DDEC3B4A7F3E",
"name": "nRF Mesh Provisioner",
"deviceKey": "A58EB545939B465CE570D1C715D4D7D8",
"unicastAddress": "0001",
"security": "insecure",
"configComplete": true,
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 2,
"relay": 2
},
"defaultTTL": 5,
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
},
{
"index": 1,
"updated": false
},
{
"index": 2,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0001",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0001",
"bind": [],
"subscribe": []
}
]
}
],
"excluded": false
},
{
"UUID": "B67735AF-7EA4-4195-B93E-AA5BE5247957",
"name": "nRF5x Mesh Sensor Client",
"deviceKey": "2F356FF1C12C4CCA95EF74ADDA57CC7D",
"unicastAddress": "0002",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 40,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0002",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
}
]
},
{
"name": "Element: 0x0003",
"index": 1,
"location": "0000",
"models": [
{
"modelId": "1102",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "C001",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 0,
"resolution": 100
},
"retransmit": {
"count": 1,
"interval": 100
},
"credentials": 0
}
}
]
},
{
"name": "Element: 0x0004",
"index": 2,
"location": "0000",
"models": [
{
"modelId": "1102",
"bind": [],
"subscribe": []
}
]
}
],
"excluded": false
},
{
"UUID": "AFDF401E-2C98-4D22-8A7E-D10619E0B50C",
"name": "nRF5x Mesh Sensor Setup Serve",
"deviceKey": "6EF5BA2EA63B3AE407A55DA38F3E5884",
"unicastAddress": "0005",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 15,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0005",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 100
},
"retransmit": {
"count": 1,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C001"
]
}
]
}
],
"excluded": false
},
{
"UUID": "240113A6-84C5-491E-AFCF-911C921BB4A0",
"name": "nRF5x Mesh Sensor Setup Serve",
"deviceKey": "3B55DAC7DF919F76635D9B1DD2DE6054",
"unicastAddress": "0006",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 15,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0006",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 100
},
"retransmit": {
"count": 1,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C001"
]
}
]
}
],
"excluded": false
},
{
"UUID": "5423B734-E079-4C50-B0D9-E2D8BC25FA9C",
"name": "nRF5x Mesh Sensor Setup Serve",
"deviceKey": "A8CB21F75A106C8125A26A627B2D57E6",
"unicastAddress": "0008",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 15,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0008",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 100
},
"retransmit": {
"count": 1,
"interval": 100
},
"credentials": 0
}
},
{
"modelId": "1101",
"bind": [
0
],
"subscribe": [
"C001"
]
}
]
}
],
"excluded": false
},
{
"UUID": "0F2EAF58-0D3F-439F-BB24-D199F320A8BE",
"name": "nRF5x Mesh Sensor Setup Serve",
"deviceKey": "A6E2F8DA93A0B71B3BC50C0D4232312B",
"unicastAddress": "0009",
"security": "insecure",
"configComplete": false,
"cid": "0059",
"pid": "0000",
"vid": "0000",
"crpl": "0028",
"features": {
"friend": 2,
"lowPower": 2,
"proxy": 1,
"relay": 1
},
"defaultTTL": 15,
"networkTransmit": {
"count": 2,
"interval": 20
},
"netKeys": [
{
"index": 0,
"updated": false
}
],
"appKeys": [
{
"index": 0,
"updated": false
}
],
"elements": [
{
"name": "Element: 0x0009",
"index": 0,
"location": "0000",
"models": [
{
"modelId": "0000",
"bind": [],
"subscribe": []
},
{
"modelId": "0002",
"bind": [],
"subscribe": []
},
{
"modelId": "1100",
"bind": [
0
],
"subscribe": [],
"publish": {
"address": "0003",
"index": 0,
"ttl": 1,
"period": {
"numberOfSteps": 10,
"resolution": 100
},
"retransmit": {
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