Measuring distance between two devices using puck.js

Posted on Wed 23rd, May 2018

• #1

Saurabh

Hi friends,

I am working on some project in which we have to measure the distance between two nearby device using puck.js . if distance is less then a meter . we need to emit LED.

One device is puck.js and other one is ESP32.
Help me to figure out this.
• #2

Gordon
Assuming the ESP32 is advertising, you should be able to use something like:
```
NRF.setScan(function(d) {
  if (d.addr=="...") LED.write(d.rssi>-70);
});
```
You'll need to change the address and probably the RSSI value as well, but that should be a good start :)
• #3

Saurabh

Thanks its working
• #4

Gordon

Just a quick note that doing this does use a lot of power (as the radio is always receiving) so will run the battery down quite quickly - so you might want a way of only enabling it when you need it.

Post a reply
- Bold
- Italics
- Link
- Image
- List
- Quote
- code
- Preview
Formatting Help

Don't worry about formatting, just type in the text and we'll take care of making sense of it. We will auto-convert links, and if you put asterisks around words we will make them bold.

Tips:

Create headers by underlining text with ==== or ----

To *italicise* text put one asterisk each side of the word

To **bold** text put two asterisks each side of the word

Embed images by entering:
![](https://www.google.co.uk/images/srpr/logo4w.png)
That's the hard one: exclamation, square brackets and then the URL to the image in brackets.

* Create lists by starting lines with asterisks

1. Create numbered lists by starting lines with a number and a dot

> Quote text by starting lines with >

Mention another user by @username

For syntax highlighting, surround the code block with three backticks:

```
Your code goes here
```
Just like Github, a blank line must precede a code block.

If you upload more than 5 files we will display all attachments as thumbnails.

For a full reference visit the Markdown syntax.