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Johnathan B

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SKSignal K

•Created by Johnathan B on 5/10/2024 in #questions

Generate Notification from "True" "False"

Thank you

7 replies

SKSignal K

•Created by Johnathan B on 3/26/2024 in #sensors

Johnathan B - HiCould someone point me in the ...

For anyone reading this in the future, it appears that what I am trying to do is not possible. And it is not possible to update a path's value via the rest API and it can only be done via a websockets / UDP connection.

11 replies

SKSignal K

•Created by Johnathan B on 4/2/2024 in #questions

Help Posting Values to SK

thank you

11 replies

SKSignal K

•Created by Johnathan B on 4/2/2024 in #questions

Help Posting Values to SK

11 replies

SKSignal K

•Created by Johnathan B on 4/2/2024 in #questions

Help Posting Values to SK

Thanks Paddy. When sending over UDP how are you authenticating with SK?

11 replies

SKSignal K

•Created by Johnathan B on 4/2/2024 in #questions

Help Posting Values to SK

thank you everyone

11 replies

SKSignal K

•Created by Johnathan B on 3/26/2024 in #sensors

Johnathan B - HiCould someone point me in the ...

I have tried this as well as sending it as a string - and I get the same result. This morning I rewrote the code in micropython and I get the same result as I do in Python and circuit Python. I really don't understand. I communicate with some of my Victron kit in exactly this way but I must be doing something wrong. In signalK is there a way of seeing the 'bad' inbound json string? I can only see log that says SyntaxError: Unexpected token " in JSON at position 0 at JSON.parse (<anonymous>) at createStrictSyntaxError I don't know where to go now. Any help from anyone would be appreciated. Below is the output of my code. With the headers, json and response printed to the screen. {'Authorization': 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6ImFkbWluIiwiaWF0IjoxNzExOTY0NjI2LCJleHAiOjE3OTgzNjQ2MjZ9.uWqOLURCasix1-LsDRmJSpjC-bkdnlPLjpiMbFnjL90', 'Content-Type': 'application/json'} {"updates": [{"values": [{"path": "electrical.batteries.999.capacity.timeRemaining", "value": 1234}]}]} http://192.168.2.133:3000/signalk/v1/api/ Error writing to Signal K path: api/. Status code: 400 ** RESPONSE ** <html> <head> <meta charset='utf-8'> <title>SyntaxError: Unexpected token " in JSON at position 0</title>

11 replies

SKSignal K

•Created by Johnathan B on 3/26/2024 in #sensors

Johnathan B - HiCould someone point me in the ...

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import requests
import json

# Replace with your Signal K server URL and API token
server_url = "http://192.168.2.133:3000"
api_token = ""

# Path to write to
path = "api/"   #----------------------Changed here 
value = 120  # Example value in minutes
# Construct URL with path
url = f"{server_url}/signalk/v1/{path}"

# Function to obtain an authentication token
def get_token():
    login_url = "http://192.168.2.133:3000/signalk/v1/auth/login"
    credentials = {"username": "admin", "password": "******"}
    response = requests.post(login_url, json=credentials)
    if response.status_code == 200:
        return response.json().get("token")
    else:
        print("Failed to authenticate.")
        return None

api_token=get_token()
# Set headers with API token
headers = {
    "Authorization": f"Bearer {api_token}",
    "Content-Type": "application/json",
}

# Data to send in PUT request
#----------------------Changed here  this json works fine int he data fiddler
data = {"updates": [{"values": [{"path": "electrical.batteries.999.capacity.timeRemaining", "value": 1234}]}]}
print(headers)
print(json.dumps(data))
print(url)
try:
  # Send PUT request
  response = requests.put(url, headers=headers, json=json.dumps(data))

  # Check for successful response
  if response.status_code == 200:
    print("Value written successfully to Signal K path:", path)
  else:
    print(f"Error writing to Signal K path: {path}. Status code: {response.status_code}")
    print("********** RESPONSE **********")
    print(response.text)

except requests.exceptions.RequestException as e:
  print(f"Error: {e}")

)

11 replies

SKSignal K

•Created by Johnathan B on 3/26/2024 in #sensors

Johnathan B - HiCould someone point me in the ...

Thanks for taking the time to reply Roger.
Here is is the same code but this time it includes getting a token when first run instead of using and access request. This gives a response of 400, but returns some HTML saying their is a problem with the Json. The output of my code looks like this. If I check the posted json in the datafiddler it validates post fine. {'Authorization': 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6ImFkbWluIiwiaWF0IjoxNzExNTM4MjU0LCJleHAiOjE3OTc5MzgyNTR9.oo0FWBOFVRbzv-bA0TzEqzyG4ydAPZL5AkfJRmtF37Y', 'Content-Type': 'application/json'} {"updates": [{"values": [{"path": "electrical.batteries.999.capacity.timeRemaining", "value": 1234}]}]} http://192.168.2.133:3000/signalk/v1/api/ Error writing to Signal K path: api/. Status code: 400 html> <head> <meta charset='utf-8'> <title>SyntaxError: Unexpected token " in JSON at position 0</title> ...... more HTML The stakctrace is: <ul id="stacktrace"><li>    at JSON.parse (<anonymous>)</li><li>    at createStrictSyntaxError (/usr/local/lib/node_modules/signalk-server/node_modules/body-parser/lib/types/json.js:169:10)</li><li>    at parse (/usr/local/lib/node_modules/signalk-server/node_modules/body-parser/lib/types/json.js:86:15)</li><li>    at /usr/local/lib/node_modules/signalk-server/node_modules/body-parser/lib/read.js:128:18</li><li>    at AsyncResource.runInAsyncScope (node:async_hooks:203:9)</li><li>    at invokeCallback (/usr/local/lib/node_modules/signalk-server/node_modules/raw-body/index.js:238:16)</li><li>    at done (/usr/local/lib/node_modules/signalk-server/node_modules/raw-body/index.js:227:7)</li><li>    at IncomingMessage.onEnd (/usr/local/lib/node_modules/signalk-server/node_modules/raw-body/index.js:287:7)</li> The odd thing is I can successfully post the same json using websockets in Python. My test code for the output above is:

11 replies

SKSignal K

•Created by Johnathan B on 3/26/2024 in #sensors

Johnathan B - HiCould someone point me in the ...

Thanks for your help Roger I had tried the json previously. Here is the same code but no using the url /signalk/v1/api and some json that works fine in the data fiddler. Again I get this errror Error writing to Signal K path: api/. Status code: 401 You do not have permission to view this resource, <a href='/admin/#/login'>Please Login</a> Previously I have tried the same code but creating the token based on an u / p login - with the same issue. (


import requests

# Replace with your Signal K server URL and API token
server_url = "http://192.168.2.133:3000"
api_token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkZXZpY2UiOiJ5b3VyX2RldmljZV9pZCIsImlhdCI6MTcxMTQ2Nzg1N30.X2wxz-qzux0RWQyFq8zQ8v1La9jGBf9r1iL0xgjtliE"

# Path to write to
path = "api/"   #----------------------Changed here 

# Value to write (replace with desired time remaining value)
value = 120  # Example value in minutes

# Construct URL with path
url = f"{server_url}/signalk/v1/{path}"

# Set headers with API token
headers = {
    "Authorization": f"Bearer {api_token}",
    "Content-Type": "application/json",
}

# Data to send in PUT request
#----------------------Changed here 
data = {"updates": [{"values": [{"path": "electrical.batteries.999.capacity.timeRemaining", "value": 1234}]}]}

try:
  # Send PUT request
  response = requests.put(url, headers=headers, json=data)

  # Check for successful response
  if response.status_code == 200:
    print("Value written successfully to Signal K path:", path)
  else:
    print(f"Error writing to Signal K path: {path}. Status code: {response.status_code}")
    print(response.text)

except requests.exceptions.RequestException as e:
  print(f"Error: {e}")

)

11 replies

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