ble MESH：how to delete a provisioned-node in Serial example (Pyaci)

In this April , Nordic Semiconductor release their Mesh SDK version 2.0.1
in Serial example, this example let：
- a nRF52 connect with a Windows or embedded system with UART
- a nRF52 (program serial example)act as provisioner and config client
- the provision and config records store in JSON database in  a Windows or embedded system
- the Windows or embedded system  control the nRF52 with python script
(named  interactive_pyaci.py)

for detail plz check in Nordic website：
serial example 


However the scripts doesn't have function to delete provisioned records.
That means if the node is reset, this serial example can not provision it again.
Or, if a node leave this Mesh network, the provision is not able to delete it.

In this article , I implement a script to delete the record.
name as delete_provisioned_node.py

#power by Agatha Kuan 05/16/2018

import json as JSON
import os
import sys

def check_provisioned_node(file_name):
    with open(file_name) as f:
        load_in = JSON.load(f)
        print(load_in["nodes"])


        for p in load_in["nodes"]:
            print("device name = "+p["name"])


def delete_node(undeleted_node,file_name):
    with open(file_name) as f:
        load_in = JSON.load(f)
        for p in load_in["nodes"]:
            print("list name = "+p["name"])

        for i in range(len(load_in["nodes"])):
            if load_in["nodes"][i]["name"] == undeleted_node:
                load_in["nodes"].pop(i)
                print("success delete ", undeleted_node)
                break

        open(file_name, "w").write(JSON.dumps(load_in, sort_keys=False, indent=4, separators=(',', ':')))


def main():
#sys.argv[0]  是這個腳本的檔名
    if("-c" == sys.argv[1]):
        print("check recent node")
        print("open file:", sys.argv[2])
        check_provisioned_node(sys.argv[2])

    elif("-d" == sys.argv[1]):
        print("delete device :",sys.argv[2])
        delete_node(sys.argv[2],sys.argv[3])

    elif("?" == sys.argv[1]):
        print("Functions:")
        print("1.for check provisioned node:")
        print("     -c FILE_NAME e.g -c example_database.json")
        print("2.after checking nodes, to select which to delete:")
        print("     -d DEVICE_NAME FILE_NAME e.g -d node_01 example_database.json")




if __name__ == "__main__":
    main()

Demostration：

I provision a node "0577"

in database will add a nodes record:

"nodes": [
    {
      "UUID": "0059ffff0000000009f5cf71a0100577",
      "appKeys": [
        0
      ],
      "cid": "0059",
      "configComplete": false,
      "crpl": 32,
      "deviceKey": "dd5baeb65d8ab9eb709c45397a285ab4",
      "elements": [
        {
          "index": 0,
          "location": "0000",
          "models": [
            {
              "modelId": "0000"
            },
            {
              "modelId": "0002"
            },
            {
              "bind": [
                0
              ],
              "modelId": "00590000"
            }
          ]
        }
      ],
      "features": {
        "friend": 2,
        "lowPower": 2,
        "proxy": 2,
        "relay": 0
      },
      "name": "0577",
      "netKeys": [
        0
      ],
      "pid": "0000",
      "security": "low",
      "unicastAddress": 16,
      "vid": "0000"
    }
]

Than put "delete_provisioned_node.py " in :

../script/interactive_pyaci/database

and run it in CMD :

$ database python delete_provisioned_node.py ?

it will show you operation command



So, if I want to delete "0577" , command

$ database python delete_provisioned_node.py -d 0577 example_database.json

reference：
http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v2.0.1%2Fmd_scripts_interactive_pyaci_doc_demo_configuration.html&cp=4_1_0_1_1_3_2