How to set custom timeframe (on Chart or Value Widget and other Functions)

The Chart, Value Widget and Rules come with options to set a custom time range.

In addition, the Chart Widget comes with time range presets that can be overridden by a custom one. In this guide you will find a short introduction to the various options available.

Examples

Rolling last 24 Hours: 24 hours ago ( or 1 day ago) to now
Rolling last Week: 1 week ago (or 7 days ago) to now

Relative Time Range Options

1 day ago
1 hour ago
7 days ago
1 week ago
1 month ago
last year

Absolute Time Range Options

Resolution

On some Widgets, for example the Chart Widget, you find an additional parameter to specify the resolution in which the data is fetched from the database. This settings specifies the time between datapoints within the given time range.

Best Practices

||| Please be careful when setting the resolution and chose a suitable resolution wisely. The reason for this is that a high resolution also leads to significantly longer loading times, since the data must first be retrieved from the server. This can take much longer with higher resolution and also slow down the entire loading process. We therefore suggest the following:

Daily Trends with High Resolution

We recommend to use high resolution data (like resolutions within minutes, for example 5 minutes) only in combination with time frames that go back to maximum of 48 hours. So you could

Question 2

How do I cancel my subscription?

Accepted Answer

|| There are multiple types of subscriptions on Datacake. Here's how to cancel them:

Devices

To stop your device from being billed, you can either move it to the Free plan (each Workspace can have up to two Devices on the Free plan) or delete it. Both actions are available on the Device's configuration tab at the very bottom.

Cake Red

You can cancel your Cake Red subscription from the Billing page.

White Label

You can cancel your White Label site from its settings page.

Question 3

How do I create an API Token

Accepted Answer

How to create an API Token

If you want to connect a LoRaWAN Network Server, you mostly need to create an API Token and add this to your API Integration on your Network Server. Please see the following guide on our Documentation on how to create a new API Token.

https://docs.datacake.de/portal/members/apiuser

Question 4

How to remove VAT from invoice (Tax Exemption)?

Accepted Answer

Background

In most cases, charges are subject to German VAT ("Umsatzsteuer"). There are a few cases where there is an exemption, though:

Outside EU

| You are a registered company outside the EU. If you update your billing address to include your company's name and address outside of the EU, no VAT will be charged.

Inside EU with Tax ID

| You are a registered company outside of Germany and can provide a European tax id. If you update your billing address to include your company's name, the address and provide a valid tax id, reverse charge will apply and no VAT is added.

Setup

If you want to store your tax information in Datacake, you can do so through the billing settings. To do this, navigate to the billing settings using the sidebar.

In the Billing Section now click on "Update" to open up the Billing-Address-Settings.

This will bring up the following modal, where you can enter your custom Tax-ID:

Question 5

How to Encode Measurements into Bytes with JavaScript

Accepted Answer

How to Encode Measurements into Bytes with JavaScript

In many IoT (Internet of Things) and embedded systems applications, it's essential to encode sensor measurements or other data into byte arrays before transmitting them over networks. This process often involves converting numerical values into a format that can be efficiently sent over communication protocols that accept binary or byte data. This article demonstrates how to encode measurements into bytes using JavaScript, focusing on a specific case where an integer larger than 255 needs to be split into two bytes.

Encoding Function

Our primary tool for encoding measurements in a Downlink is the Encoder function. This function takes two parameters: measurements, which is the numerical value you wish to encode, and port, which can be used to specify different encoding behaviors based on the application's requirements.

The Encoder Function

```javascript function Encoder(measurements, port) { // Assuming 'measurements' is the integer we want to split, // and it's larger than 255 but fits within a 16-bit range (0 to 65535). var integer = measurements; // For clarity, assuming 'measurements' is a single integer.

var lowerByte = integer & 0xFF; // Extract lower 8 bits
var higherByte = (integer >> 8) & 0xFF; // Shift right 8 bits and extract lower 8 bits

// The function returns an array of bytes. 
// Adjusted order to [lowerByte, higherByte] if that matches your expe

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