VerneMQ how to disconnect clients forceably per command line
There is a command vmq-admin session show which will show you the currently connected clients: Unfortunately, this output is truncated for a total width of 80 characters (no matter how many would fit) and there is currently no indication that it is. See this VerneMQ Github issue: https://github.com/vernemq/vernemq/issues/1200 To disconnect clients you need the client_id…
WeiterlesenPaho failure to subscribe
Problem AMQJS0005E Internal error. Error Message: Cannot read property ‘show’ of undefined This error is shown sporadically, especially when you Shift-Reload the whole page. Solution I have a Vue.js Plugin to show “toast” messages (Vue.toasted). I currently use it for debugging purposes. Everything worked fine initially, as my code was executed after Vue was initialized…
WeiterlesenFirst message from picockpit client rendered!
Today, 7.8.2019, at around 18:16 the code is in place for the first message to have been rendered: Thus the Pi “Alexander” is shown as online. Thanks to the magic of vue.js, MQTT, VerneMQ, AdminLTE, Crystal Lang, Python, Paho, AXIOS and much much more! This is the effort of around 320 hours of work…
WeiterlesenGetting POST requests to work with Axios, Kemal (crystal lang), vue.js
In picockpit.com, I am using AJAX requests to communicate with the backend for update operations. For instance, if you want to change the name of this Pi, you would select: which shows an inline form: how to show this inline form with vue.js is besides the point of this post (even though very interesting!) Clicking…
WeiterlesenVerneMQ MQTT connection lost (8): AMQJS0008I Socket closed. different mountpoints
In my setup, I am rewriting the mountpoints of clients from the ones set up by the listeners to individual mountpoints depending on client group. The idea behind this is perfect isolation of multi-tenancy on the server. Individual clients from different groups thus are not able to see each other, even when subscribing to “#”…
WeiterlesenShopify & Langify modify checkout link
Shopify checkout is multilingual The shopify checkout is multilingual: The trick is to have a &locale=en or &locale=en at the end of the link: You can therefore create buttons, etc. which take your user to the checkout, under the links of https://buyzero.de/checkout?locale=de https://buyzero.de/checkout?locale=en which will set the locale to the appropriate language. (replace buyzero.de by…
WeiterlesenBooting Alpine Linux on the Raspberry Pi Compute Module
In our project for a client we are using the Raspberry Pi Compute Module, along with a custom compute module carrier board (called the PCCB – Pi Control Carrier Board) which provides RS485, CAN, RS232, LAN, USB and a step-down for input voltages of 6 – 24 V. (If you are interested in customized hardware…
WeiterlesenDebugging File upload / multipart upload and other HTTP requests
Sometimes you want to see the request as it is received by the server, without any handling / obscuring of the original request. For instance, to see whether different browsers handle file uploads differently. On the other hand, you do not want to write up your own mockup server, just to handle these requests, or…
WeiterlesenLetsTrust TPM SLB 9670VQ2.0 or SLB 9670XQ2.0?
A customer approached us about the difference between SLB 9670VQ2.0 and SLB 9670XQ2.0. VQ has a standard temperature range of (-20 .. +85°C), and XQ is the enhanced temperature range version (-40 .. + 85°C). As the Raspberry Pi itself has a standard temperature range, we use the VQ version on the LetsTrust TPM.
WeiterlesenChanging the mountpoint on auth_on_register webhook for VerneMQ
It is possible to pass modifiers along with the “result”: “ok” return value of your webhook for VerneMQ. The official documentation of VerneMQ gives some examples for the syntax. changing the mountpoint It is also possible to change the mountpoint, however the client_id apparently has to be passed in as well! I have raised an…
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