Electronics and Programming tutorials and projects

Here are the frequently asked questions (FAQ) about us and the projects:

How can I order a customized copy of a firmware which is available in your website?

You can either use our contact form or send an e-mail, please refer to: https://wicard.net/contact/

How can I pay with crypto?

It’s simple, please refer to the following for more information:

Projects FAQ

i can not calibrate my microphone on esp8266

http://192.168.x.x/cal didnt work
http://192.168.x.x works fine
can you help me please?

Sometimes it takes a little while until the system put itself in the “idle” state. Also you should not open more than one web page from your module at the same time.

So I suggest these two ways:
1- Close the root page ( and then after a few seconds open calibration page (
2- Close all the pages. Re-start the module, then open calibration page after the module connected to the modem.