MDBT42Q vars and heap

Posted on Thu 28th, May 2020

• #1

MaBe

To get details about vars I use process.memory().

How to get detail about heap?
• #2

Gordon

0x20010000 - process.memory().stackEndAddress should give you an idea of stack size.

Normal Espruino devices don't actually have a heap since they don't use malloc/free, so there's not normally any need :)
• #3

MaBe
Ok, the reason is that I have no clue how much memory is need for loading all firmware and additional modules.

Decide to remove some firmware module and reduced vars to 1700 and check the free stack size .....
```
0x20010000 - process.memory().stackEndAddress
=20264
```
I can definitely bump vars up again a litte and load some mode JS modules like mqtt and oled and more :)
• #4

Gordon

Yes - loading JS modules shouldn't affect the available memory you see there at all.

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.