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user118216

Member since Sep 2020 • Last active Jan 2021
  • 3 conversations
  • 22 comments

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    • 31 comments
    • 5,923 views
    @user118216 replied

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Sorry fanoush correction. I used a modified version of bleak.
    Original version worked!! at last thanks to you and Gordon.
    I have plenty more to do with this but I hope I wont have to bother you too soon.
    For completeness
    Watch No change from above.

    Console

    Connecting...
Connected
Writing command
Waiting for data
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'=undefined\r\n>')
RX> bytearray(b'=undefined\r\n>')
Done!

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Hi fanoush,
    Thanks.
    I presumed you meant I should add your suggestion to my code app.
    I did that and still no result yet.
    Code on watch

    E.showMessage("Hello Code");

function Y(dict) {
  E.showMessage(dict.Code);
  
}

    Console

    Connecting...
Connected
Writing command
RX> bytearray(b"Y(\'+json.dumps(dict)")
RX> bytearray(b"Y(\'+json.dumps(dict)")
RX> bytearray(b"+\')\r\n")
RX> bytearray(b"+\')\r\n")
Waiting for data
RX> bytearray(b'Uncaught Error: Cann')
RX> bytearray(b'Uncaught Error: Cann')
RX> bytearray(b"ot read property \'sp")
RX> bytearray(b"ot read property \'sp")
RX> bytearray(b"lit\' of undefined\r\n ")
RX> bytearray(b"lit\' of undefined\r\n ")
RX> bytearray(b'at line 1 col 249\r\n.')
RX> bytearray(b'at line 1 col 249\r\n.')
RX> bytearray(b'..Rect(c/2-b,44,c/2+')
RX> bytearray(b'..Rect(c/2-b,44,c/2+')
RX> bytearray(b'b,45)}b=e.split("\\n"')
RX> bytearray(b'b,45)}b=e.split("\\n"')
RX> bytearray(b');var h=(f-16*b.leng')
RX> bytearray(b');var h=(f-16*b.leng')
RX> bytearray(b'th...\r\n             ')
RX> bytearray(b'th...\r\n             ')
RX> bytearray(b'                 ^\r\n')
RX> bytearray(b'                 ^\r\n')
RX> bytearray(b'in function called f')
RX> bytearray(b'in function called f')
RX> bytearray(b'rom line 1 col 24\r\nE')
RX> bytearray(b'rom line 1 col 24\r\nE')
RX> bytearray(b'.showMessage(dict.Co')
RX> bytearray(b'.showMessage(dict.Co')
RX> bytearray(b'de);\r\n              ')
RX> bytearray(b'de);\r\n              ')
RX> bytearray(b'         ^\r\nat line ')
RX> bytearray(b'         ^\r\nat line ')
RX> bytearray(b'1 col 24\r\nE.showMess')
RX> bytearray(b'1 col 24\r\nE.showMess')
RX> bytearray(b'age(dict.Code);\r\n   ')
RX> bytearray(b'age(dict.Code);\r\n   ')
RX> bytearray(b'                    ')
RX> bytearray(b'                    ')
RX> bytearray(b'^\r\nin function "Y" c')
RX> bytearray(b'^\r\nin function "Y" c')
RX> bytearray(b'alled from line 1 co')
RX> bytearray(b'alled from line 1 co')
RX> bytearray(b"l 23\r\nY(\'+json.dumps")
RX> bytearray(b"l 23\r\nY(\'+json.dumps")
RX> bytearray(b"(dict)+\')\r\n         ")
RX> bytearray(b"(dict)+\')\r\n         ")
RX> bytearray(b'             ^\r\n>')
RX> bytearray(b'             ^\r\n>')
Done!

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Looks like my code didnt post well, I will try again.

    bleak code

    #!/usr/bin/env python3

import asyncio
import array
from bleak import discover
from bleak import BleakClient
import json

[#create](https://forum.espruino.com/search/?q=%23create) dictionary for the data to be sent
dict = {'Code': '10'}

address = "D8:AB:E0:B7:F5:AE"
UUID_NORDIC_TX = "6e400002-b5a3-f393-e0a9-e50e24dcca9e"
UUID_NORDIC_RX = "6e400003-b5a3-f393-e0a9-e50e24dcca9e"

command = "Y('+json.dumps(dict)+')\n"


def uart_data_received(sender, data):
    print("RX> {0}".format(data))

async def run():
    devices = await discover()
    for d in devices:
        print(d)

print("Connecting...")
async def run(address, loop):
    async with BleakClient(address, loop=loop) as client:
        print("Connected")
        await client.start_notify(UUID_NORDIC_RX, uart_data_received)
        print("Writing command")
        c=command
        while len(c)>0:
          await client.write_gatt_char(UUID_NORDIC_TX,bytearray((c[0:20]),'utf-8') , True)
          c = c[20:]
        print("Waiting for data")
        await asyncio.sleep(1.0, loop=loop) # wait for a response
        print("Done!")


loop = asyncio.get_event_loop()
loop.run_until_complete(run(address, loop))

    Console

    Connecting...
Connected
Writing command
Waiting for data
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'Uncaught Error: Func')
RX> bytearray(b'Uncaught Error: Func')
RX> bytearray(b'tion "split" not fou')
RX> bytearray(b'tion "split" not fou')
RX> bytearray(b'nd!\r\n at line 1 col ')
RX> bytearray(b'nd!\r\n at line 1 col ')
RX> bytearray(b'250\r\n...ect(c/2-b,44')
RX> bytearray(b'250\r\n...ect(c/2-b,44')
RX> bytearray(b',c/2+b,45)}b=e.split')
RX> bytearray(b',c/2+b,45)}b=e.split')
RX> bytearray(b'("\\n");var h=(f-16*b')
RX> bytearray(b'("\\n");var h=(f-16*b')
RX> bytearray(b'.length)...\r\n       ')
RX> bytearray(b'.length)...\r\n       ')
RX> bytearray(b'                    ')
RX> bytearray(b'                    ')
RX> bytearray(b'   ^\r\nin function ca')
RX> bytearray(b'   ^\r\nin function ca')
RX> bytearray(b'lled from line 1 col')
RX> bytearray(b'lled from line 1 col')
RX> bytearray(b' 19\r\nE.showMessage(d')
RX> bytearray(b' 19\r\nE.showMessage(d')
RX> bytearray(b'ict);\r\n             ')
RX> bytearray(b'ict);\r\n             ')
RX> bytearray(b'     ^\r\nat line 1 co')
RX> bytearray(b'     ^\r\nat line 1 co')
RX> bytearray(b'l 19\r\nE.showMessage(')
RX> bytearray(b'l 19\r\nE.showMessage(')
RX> bytearray(b'dict);\r\n            ')
RX> bytearray(b'dict);\r\n            ')
RX> bytearray(b'      ^\r\nin function')
RX> bytearray(b'      ^\r\nin function')
RX> bytearray(b' "Y" called from lin')
RX> bytearray(b' "Y" called from lin')
RX> bytearray(b'e 1 col 17\r\nY({"Code')
RX> bytearray(b'e 1 col 17\r\nY({"Code')
RX> bytearray(b'": "10"})\r\n         ')
RX> bytearray(b'": "10"})\r\n         ')
RX> bytearray(b'       ^\r\n>')
RX> bytearray(b'       ^\r\n>')

    Code on watch

    E.showMessage("Hello Code");

function Y(dict) {
  E.showMessage(dict);
  
}

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Thanks Gordon,
    So I now have double quotes back in and I have tested the connection and it has worked ok so far in terms of not giving the connection error.However the console output looks werid and the watch display is blank.
    So I will post the complete code.

    ``
    #!/usr/bin/env python3

    import asyncio
    import array
    from bleak import discover
    from bleak import BleakClient
    import json

    #create dictionary for the data to be sent
    dict = {'Code': '10'}

    address = "D8:AB:E0:B7:F5:AE"
    UUID_NORDIC_TX = "6e400002-b5a3-f393-e0a9-e50e24dcca9e"
    UUID_NORDIC_RX = "6e400003-b5a3-f393-e0a9-e50e24dcca9e"
    #command = "X("+json.dumps(dict)+")\n"
    #command = b"E.showMessage('Hello','A Title')/n"
    command = "Y("+json.dumps(dict)+")\n"

    def uart_data_received(sender, data):

    print("RX> {0}".format(data))

    You can scan for devices with:

    async def run():

    devices = await discover()
for d in devices:
    print(d)

    print("Connecting...")
    async def run(address, loop):

    async with BleakClient(address, loop=loop) as client:
    print("Connected")
    await client.start_notify(UUID_NORDIC_RX, uart_data_received)
    print("Writing command")
    c=command
    while len(c)>0:
      await client.write_gatt_char(UUID_NORDIC_TX,bytearray((c[0:20]),'utf-8') , True)
      c = c[20:]
    print("Waiting for data")
    await asyncio.sleep(1.0, loop=loop) # wait for a response
    print("Done!")

    loop = asyncio.get_event_loop()
    loop.run_until_complete(run(address, loop))

    My app. Note function is now Y.

    E.showMessage("Hello Code");

    function Y(dict) {
    E.showMessage(dict);

    }

    and the console

    Connecting...
    Connected
    Writing command
    Waiting for data
    RX> bytearray(b'Y({"Code": "10"})\r\n')
    RX> bytearray(b'Y({"Code": "10"})\r\n')
    RX> bytearray(b'Uncaught Error: Func')
    RX> bytearray(b'Uncaught Error: Func')
    RX> bytearray(b'tion "split" not fou')
    RX> bytearray(b'tion "split" not fou')
    RX> bytearray(b'nd!\r\n at line 1 col ')
    RX> bytearray(b'nd!\r\n at line 1 col ')
    RX> bytearray(b'250\r\n...ect(c/2-b,44')
    RX> bytearray(b'250\r\n...ect(c/2-b,44')
    RX> bytearray(b',c/2+b,45)}b=e.split')
    RX> bytearray(b',c/2+b,45)}b=e.split')
    RX> bytearray(b'("\n");var h=(f-16*b')
    RX> bytearray(b'("\n");var h=(f-16*b')
    RX> bytearray(b'.length)...\r\n ')
    RX> bytearray(b'.length)...\r\n ')
    RX> bytearray(b' ')
    RX> bytearray(b' ')
    RX> bytearray(b' ^\r\nin function ca')
    RX> bytearray(b' ^\r\nin function ca')
    RX> bytearray(b'lled from line 1 col')
    RX> bytearray(b'lled from line 1 col')
    RX> bytearray(b' 19\r\nE.showMessage(d')
    RX> bytearray(b' 19\r\nE.showMessage(d')
    RX> bytearray(b'ict);\r\n ')
    RX> bytearray(b'ict);\r\n ')
    RX> bytearray(b' ^\r\nat line 1 co')
    RX> bytearray(b' ^\r\nat line 1 co')
    RX> bytearray(b'l 19\r\nE.showMessage(')
    RX> bytearray(b'l 19\r\nE.showMessage(')
    RX> bytearray(b'dict);\r\n ')
    RX> bytearray(b'dict);\r\n ')
    RX> bytearray(b' ^\r\nin function')
    RX> bytearray(b' ^\r\nin function')
    RX> bytearray(b' "Y" called from lin')
    RX> bytearray(b' "Y" called from lin')
    RX> bytearray(b'e 1 col 17\r\nY({"Code')
    RX> bytearray(b'e 1 col 17\r\nY({"Code')
    RX> bytearray(b'": "10"})\r\n ')
    RX> bytearray(b'": "10"})\r\n ')
    RX> bytearray(b' ^\r\n>')
    RX> bytearray(b' ^\r\n>')
    Done!

    ```
    Any help most appreciated.

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Thanks Gordon,
    I have tried your suggestion but bleak throws an error, which I will show below.
    My single quotes show jason.dump etc as before. This is also below.
    However I am confused, as per conversation with fanoush, I thought my problem is for my function to convert the bytearray back to a string using javascript. ( Icant find a way to do this yet) but any clarity on this matter would help.
    With the following

    command = "Y("+json.dumps(dict)+")\n"

    gives an error. Note I am not convinced that this is due to the command line as bleak seems a bit unstable.

    File "/home/pi/.local/lib/python3.7/site-packages/bleak/backends/bluezdbus/client.py", line 146, in connect
    raise BleakError(str(e))
bleak.exc.BleakError: org.bluez.Error.Failed: Software caused connection abort

    With this

    command = "Y('+json.dumps(dict)+')\n"

``Console gives

    Connecting...
    Connected
    Writing command
    RX> bytearray(b"Y(\'+json.dumps(dict)")
    RX> bytearray(b"Y(\'+json.dumps(dict)")
    RX> bytearray(b"+\')")
    RX> bytearray(b"+\')")
    RX> bytearray(b'\r\n')
    RX> bytearray(b'\r\n')
    Waiting for data
    RX> bytearray(b'=undefined\r\n>')
    RX> bytearray(b'=undefined\r\n>')
    Done!

    The watch displays

    +json.dumps(dict)+
    ```

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Sorry console didnt post right

    Connecting...
Connected
Writing command
Waiting for data
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'Y({"Code": "10"})\r\n')
RX> bytearray(b'Uncaught ReferenceEr')
RX> bytearray(b'Uncaught ReferenceEr')
RX> bytearray(b'ror: "nY" is not def')
RX> bytearray(b'ror: "nY" is not def')
RX> bytearray(b'ined\r\n at line 1 col')
RX> bytearray(b'ined\r\n at line 1 col')
RX> bytearray(b" 25\r\nY(\'+json.dumps(")
RX> bytearray(b" 25\r\nY(\'+json.dumps(")
RX> bytearray(b'dict)+\')/nY({"Code":')
RX> bytearray(b'dict)+\')/nY({"Code":')
RX> bytearray(b' "10"})/nY({"Code": ')
RX> bytearray(b' "10"})/nY({"Code": ')
RX> bytearray(b'"10"}...\r\n          ')
RX> bytearray(b'"10"}...\r\n          ')
RX> bytearray(b'              ^\r\n>')
RX> bytearray(b'              ^\r\n>')
Done!

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Thanks got you.
    I now get output on the watch. Not what I want but progress.
    Watch shows

    +json.dumps(dict)+

    Console shows

    Connecting... Connected Writing command Waiting for data RX> bytearray(b'Y({"Code": "10"})\r\n') RX> bytearray(b'Y({"Code": "10"})\r\n') RX> bytearray(b'Uncaught ReferenceEr') RX> bytearray(b'Uncaught ReferenceEr') RX> bytearray(b'ror: "nY" is not def') RX> bytearray(b'ror: "nY" is not def') RX> bytearray(b'ined\r\n at line 1 col') RX> bytearray(b'ined\r\n at line 1 col') RX> bytearray(b" 25\r\nY(\'+json.dumps(") RX> bytearray(b" 25\r\nY(\'+json.dumps(") RX> bytearray(b'dict)+\')/nY({"Code":') RX> bytearray(b'dict)+\')/nY({"Code":') RX> bytearray(b' "10"})/nY({"Code": ') RX> bytearray(b' "10"})/nY({"Code": ') RX> bytearray(b'"10"}...\r\n ') RX> bytearray(b'"10"}...\r\n ') RX> bytearray(b' ^\r\n>') RX> bytearray(b' ^\r\n>') Done! `
    I will try the acii next.
    Thanks

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    I am sorry I dont understand what you mean?

  • Connect RPI with Bangle and send data
    in Bangle.js •
    Avatar for user118216

    Hi fanoush, thanks for your patience.
    So to go back I made the following changes but I stiil get no display on the watch. Just to note the function has changed to Y rather than X.
    This is the console output.

    Connecting...
Connected
Writing command
Waiting for data
RX> bytearray(b'Y({"Code": "10"})/n')
RX> bytearray(b'Y({"Code": "10"})/n')
Done!

    Putting the command back to what is was

    command = "Y("+json.dumps(dict)+")/n"

    and my app function is now

    E.showMessage("Hello Code");

function Y(dict) {
  E.showMessage(dict);

}
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