Software

A Teaser of What to expect from our upcoming WiFi connected 2 channel relay board.

Web UI of the relay board

Main control screen and part of the configuration

Main control screen

Part of the configuration

Schedule editor

Hi,

A simple i2c driver for the Microchip’s TCN75A thermometer – supports up to 8 thermometers. Driver works in one shot mode which is suitable for battery powered operations. The chip is with quite good specs for its price.

Code at github esp_i2c_tcn75a .

Usage:  checkout user/user_main.c for example usage.

Enjoy!

73

 

After a lots of lots of wasted hours  debugging an I2C driver it came out that the noise from the connected cheep USB2TTL converter is way too much. Would have lost months without the help of the new DS1054z scope i’ve got.

So i came up with this – a simple UDP debugging.

Simple socket to send udp messages.

dbg

Call dbg_udp_start(0) and you are ready to go. If you prefer not to flood your LAN with debug messages broadcasts then instead of 0 provide your workstation IP address.

In case you’ve missed it! Kicad is going to get some really nice features!

While working on a current project i’ve faced an issue with code reuse. Espressif sdk allows only one interrupt handler for all GPIOs. That’s fine for monolithic code but since we like modular code a dispatcher comes handy.

The little inconvenience i’ve had was like this. I wanted to use the drivers/key.c code but it does use the data argument , so i’ve had to modify it to use a global variable. So i can call it from my own interrupt handler. And that is ugly.

$ open devlog

I’ve back imported footprints for a .cmp file and I’ve misunderstood  kicad’s question about the imported footprints visibility, so all went visible.

And surprise, you can not edit visibility for all fields at once.

So  little utility was born – fixvis.

Usage is pretty simple:
./fixvis file.sch fieldid newval
where fieldid is:
0 - Reference
1 - Value
2 - Footprint
3 - Datasheet
4+ - custom
newval: 0000 = visible, 0001 = hidden

Spend last weekend trying to make apache with proxy_wstunnel to work.
The solution recommended is to add this in the apache config:


ProxyRequests off

ProxyPass /mqtt ws://127.0.0.1:8082

ProxyPassReverse /mqtt ws://127.0.0.1:8082

But no matter what it is a no go. So, where is the problem?

It’s the libwebsockets it doesn’t understand custom http headers X-… but apache adds some.

To add support for them in the file lextable-strings.h append before the blank string :


“x-forwarded-server”,

“x-forwarded-for”,

“x-forwarded-host”,