How to address web socket correctly

[JonahPi]

Hi all, I'd like to use the web-socket to control the wordclock from Node-Red but I don't know how to address it correctly. I see that my connection request reaches the Raspberry but the connection is immediately terminated without any error message. From the client side I get the message: "ws:undefined : Error: not opened". As URL I use "ws://192.168.0.58:8081". Beside this I also don't know exactly how the payload of the JSON file should look like, I've seen that there is one parameter "API" which should be 2 but I have no idea what this means. Has anybody a sample Websocket request which e.g. activates the pluging "sunrise" ? Cheers Jo

[bk1285]

Hi @JonahPi this is currently a bit experimental. Best practice would be to use the version on feature/refactoring branch The according interfaces are listed here: https://github.com/bk1285/rpi_wordclock/blob/feature/refactoring/wordclock_interfaces/web_interface.py

• eg. "/set/plugin"
• eg. "/get/list" Example, how it's used is here https://github.com/bk1285/rpi_wordclock/blob/feature/refactoring/wordclock_interfaces/static/js/form.js

Best, Bernd

[JonahPi]

Hi Bernd Unfortunately that doesn't help me much since I am a beginner in terms of python programming. Not sure if you know Node-Red but it makes it usually pretty easy to connect to Websocket, you have Web-socket client node (which I configured to connect to ws://192.168.0.58:8081) and then you use an inject node for the payload (I selected to inject a JSON formated payload ) However the file wordclock_socket.py exits in the part below, it seems self.request.recv doesn't receive any data

def recv_msg(self):

Read message length and unpack it into an integer

raw_msglen = self.__recvall(4) if not raw_msglen: raise msglen = struct.unpack('>I', raw_msglen)[0]

Read the message data

return self.__recvall(msglen)

def __recvall(self, n):
    # Helper function to recv n bytes or return None if EOF is hit
    data = ''
    while len(data) < n:
        packet = self.request.recv(n - len(data))
        if not packet:
            return None
        data += packet
    return data

.

Cheers Jo

[bk1285]

Hi @JonahPi

checkout latest develop, which contains the lastest documented json-api.

Best, Bernd

[bk1285]

Visit http://192.168.X.Y/api to access the latest api.

... after replacing 192.168.X.Y with your wordclocks IP.