@scalz
Partially agree. Ideally, the ground distance from the antenna should be > 30mm. This condition is not feasible :). In my case, as far as possible... Generally a big issue to the most printed antenna. How well these printed antennas are calculated on all these radio modules :)). But this already the twists and turns... However, thanks for the advice, not in my rules to give up reasonable, kind and free advice 
@openhardware-io
Maybe, but no problem noticed, this device is powered by battery, not by pulse power supply. There's no PWM, no induction. Work perfectly. There are no lines behind the transmitting antenna
This adapter for these devices https://www.openhardware.io/view/589/Temperature-and-humidity-sensor
@gohan
Even if you make a mini device, you still need to leave the possibility of firmware bootloader and sketches because first of all it is a DIY device
@gohan
Use is very simple and convenient. This is an adapter for my mini devices. I would be glad if others start to use.
@dakipro Hello, I have been working with this controller for two years. The server is running on Orange Pi Zero
No stencil?
will add later ...
PCB manufacturing process
Making Circuit Boards Using a Laser Printer - Ec-Projects – 16:56
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MyS Duino